SYSWELD之T型接头建模及网格划分

SYSWELD之T型接头建模及网格划分 Visual-Mesh V3.0 Tutorial 13: CAD for ‘T’ Weld Joint VTS-3.0-ME-AT-12 This working document and related know-how herein provided by ESI Group subject to contractual conditions are to remain confidential. The client shall not disclose the documentation and/or related know-how in whole or in part to any third party without the prior written permission of ESI Group Copyright ? ESI Group, 2007. All rights reserved. ESI Group Learning Solutions Visual-Mesh Tutorials 1 JMI, July-06 Prerequisites: It is recommended to have familiarity with the basic features of Visual Mesh. Objective: In this tutorial you will learn how to use Surface and Curve options in Visual Mesh effectively to created CAD model which will represent a Weld Joint Description: In Visual Mesh there are many CAD (Surfaces and Curves) generation and editing methods. We have send some of the CAD editing features in previous tutorials. In the following tutorial you will learn to generate Surfaces and Curves on a new model which will be representation of the weld model, a ‘T’ Joint. Outline: Loading Model .................................................................... 错误～未定义书签。162 Ground Plate Modeling...................................................... 错误～未定义书签。162 Rib Modeling ...................................................................... 错误～未定义书签。164 Filler Material Modeling Gap Modeling Curves Generation Parts Management Saving the Model Duration: This tutorial will take approximately 25 minutes to execute. Files used: This tutorial uses a new model, Document1.vdb ESI Group Learning Solutions Visual-Mesh Tutorials 2 JMI, July-06 Loading Model , Invoke Visual-Mesh. , Click File -> New or press CTRL+N Files , New model window will start with the default name of Document1.vdb Ground Plate Modeling Nodes Creation , Post By XYZ, Locate… GUI from Nodes menu (Nodes -> By XYZ, Locate…) or hit F8 key , With default Node creation method, in the posted GUI enter the 0, -60, 10 in the X, Y & Z fields respectively , The default method will be XYZ and the default ID 1 for the new Node. Click on Create Node and see in the model window that there will be a new node. , For Node 2, enter 0, 60, 10 in the X, Y, Z fields and click on Create Node. , For Node 3, enter 0, -60, 0 in the X, Y, Z fields and click on Create Node. , For Node 4, enter 0, 60, 0 in the X, Y, Z fields and click on Create Node. , The new nodes will have IDs of 1, 2, 3 and 4 respectively. , Close the By XYZ, Locate… ESI Group Learning Solutions Visual-Mesh Tutorials 3 JMI, July-06 To Create a Surfaces with the required size, you need to create Nodes. With the help of these nodes Surface and curves will be created. Surface Creation by Blend , Post Blend GUI from Surface menu (Surface -> Blend (Spline) ) , Change Mesh only option to Surf Only option , In the model window pick Node 1 & Node 2 and confirm by middle mouse button. This becomes first primary edge for the blend Surface. , Pick Node 3 & Node 4 and confirm by middle mouse button. This becomes second primary edge for the blend Surface. , Click on OK to confirm. The new surface will be created and it will be in Part 1 which is default. Surface Creation by Sweep , Post Sweep GUI from Surface menu (Surface -> Sweep (Drag) ) , Change sweeping curve option to Multiple Curves and enter 200 in the Distance field. , Change Mesh only option to Surf Only option ESI Group Learning Solutions Visual-Mesh Tutorials 4 JMI, July-06 , Enter 1 in Part ID filed , Pick the top edge of the newly created Surface as shown in the below picture and confirm , After confirming the sweep curve selection, a Vector Definition GUI is posted , Select Global Axis as the Vector definition option and click on Flip to make the vector in - X direction , Click on Ok/Close in the Vector Definition GUI to accept the Vector and close the GUI ESI Group Learning Solutions Visual-Mesh Tutorials 5 JMI, July-06 , Look the preview of the surface to be generated and confirm it by clicking on Ok in Sweep GUI Follow the same above steps and generate 3 more sweep surfaces by selecting the remaining 3 edges of the blend surface. 1 Blend surface and 4 Sweep surfaces will look like as shown in the picture below. Now you need to copy the Blend surface on the other ends of the Sweep surfaces to represent the closed volume of the Ground plate Surface Transform , Post Surface Transform GUI from Surface menu (Surface -> Transform) , Toggle on Fix option for Y Axis and Z Axis and enter -200 in the dX field , Select the Surface created by blend and confirm by clicking on Update Entities , Toggle Copy option and keep the other options default , Confirm the transformation by Clicking on Copy ESI Group Learning Solutions Visual-Mesh Tutorials 6 JMI, July-06 This completes the modeling of the Ground plate. Now we will model the Rib Plate. Rib Modeling Nodes Creation , Post By XYZ, Locate… GUI from Nodes menu (Nodes -> By XYZ, Locate…) , With default Node creation method, in the posted GUI enter the 0, -5, 12 in the X, Y & Z fields respectively. The ID of the new Node will be 5. , Click on Create Node and see in the model window that there will be a new node. , For Node 6, enter 0, -5, 72 in the X, Y, Z fields and click on Create Node. , For Node 7, enter 0, 5, 12 in the X, Y, Z fields and click on Create Node. , For Node 4, enter 0, 5, 72 in the X, Y, Z fields and click on Create Node. , The new nodes will have IDs of 5, 6, 7 and 8 respectively. ESI Group Learning Solutions Visual-Mesh Tutorials 7 JMI, July-06 , Close the By XYZ, Locate… Surface Creation by Blend , Post Blend GUI from Surface menu (Surface -> Blend (Spline) ) , Change Part ID as 2 and keep other options default , For first primary, pick Node 5 & Node 6 and confirm by middle mouse button. , Pick Node 7 & Node 8 and confirm by middle mouse button. This becomes second primary edge for the blend Surface. , Click on OK to confirm. The new surface will be created and it will be in Part 2 Surface Creation by Sweep , Post Sweep GUI from Surface menu (Surface -> Sweep (Drag) ) , Make sure that the default options in the GUI are Multiple Curves, Distance 200 and Part ID 2. , Pick one edge of the blend surface created in the previous step ESI Group Learning Solutions Visual-Mesh Tutorials 8 JMI, July-06 , When Vector Definition panel is posted see that the default option method will be Global Axis with X – Axis. If required use Flip option to get the surface as shown in below picture Follow the same above steps and generate 3 more sweep surfaces by selecting the remaining 3 edges of the blend surface. 1 Blend surface and 4 Sweep surfaces will look like as shown in the picture below ESI Group Learning Solutions Visual-Mesh Tutorials 9 JMI, July-06 Surface Transform , Post Surface Transform GUI from Surface menu (Surface -> Transform) , Toggle on Fix option for Y Axis and Z Axis and enter -200 in the dX field , Select the Surface created by blend of Part 2 and confirm by clicking on Update Entities ESI Group Learning Solutions Visual-Mesh Tutorials 10 JMI, July-06 , Toggle Copy option and keep the other options default , Confirm the Surface transform by clicking on Copy in the GUI and close the GUI This completes the modeling of the Rib plate. Now we will model the Weld Bead. Filler Material Modeling Nodes Creation , Post By XYZ, Locate… GUI from Nodes menu (Nodes -> By XYZ, Locate…) or hit F8 key , With default Node creation method, in the posted GUI enter the 0, 5, 16 in the X, Y & Z fields respectively. The ID of the new Node will be 5. , Click on Create Node and see in the model window that there will be a new node. , For Node 6, enter 0, 5, 10 in the X, Y, Z fields and click on Create Node. ESI Group Learning Solutions Visual-Mesh Tutorials 11 JMI, July-06 , For Node 7, enter 0, 11, 10 in the X, Y, Z fields and click on Create Node. , The new nodes will have IDs of 9, 10 and 11 respectively. , Close the By XYZ, Locate… GUI Surface Creation by Blend , Post Blend GUI from Surface menu (Surface -> Blend (Spline) ) , Change Part ID as 3 and hit Enter and keep other options default , For first primary, pick Node 9 & Node 10 and confirm by middle mouse button. , Pick Node 11 & Node 10 and confirm by middle mouse button. This becomes second primary edge for the blend Surface. , Click on OK to confirm. The new surface will be created and it will be in Part 3 Surface Creation by Sweep , Post Sweep GUI from Surface menu (Surface -> Sweep (Drag) ) , Make sure that the default options in the GUI are Multiple Curves, Distance 200 and Part ID 3. , Pick one edge of the blend surface created in the previous step ESI Group Learning Solutions Visual-Mesh Tutorials 12 JMI, July-06 , When Vector Definition panel is posted see that the default option method will be Global Axis with X – Axis. If required use Flip option to get the surface as shown in below picture , Follow the same above steps and generate 2 more sweep surfaces by selecting the remaining 2 edges of the blend surface. Surface Transform , Post Surface Transform GUI from Surface menu (Surface -> Transform) , Toggle on Fix option for Y Axis and Z Axis and enter -200 in the dX field , Select the Surface created by blend of Part 3 and confirm by clicking on Update Entities , Make a Copy of the surfaces at the other end. It should be as like done for the Ground Plate This finishes modeling of the Filler Material. Now you will model the Chewing Gum material ESI Group Learning Solutions Visual-Mesh Tutorials 13 JMI, July-06 Gap material Modeling Nodes Creation by Node Drop , Change Entity Selector to Nodes and click on the Disp ID icon. See the picture below , Select all the nodes and see that all the nodes IDs are displayed in the model window , Remove the Node Selection by hitting ESC key or clicking on hitting CTRL+D , Post Drop Points/Curves/ Nodes GUI from Nodes menu. (Nodes -> Drop (Project)) , With all defaults options, select the Node 5 (N -5) and confirm by middle mouse button or click on Update Entities , Click on Select Surfaces and pick the top surface of the Ground Plate ESI Group Learning Solutions Visual-Mesh Tutorials 14 JMI, July-06 , Change the Move option to make a Copy , Confirm the Copying of the Node by clicking on OK and close the GUI. Surface Creation by Blend , Post Blend GUI from Surface menu (Surface -> Blend (Spline) ) , Change Part ID as 4 and hit Enter and keep other options default , For first primary, pick Node 5 & Node 7 and confirm by middle mouse button. , Pick Node 12 & Node 10 and confirm by middle mouse button. This becomes second primary edge for the blend Surface. ESI Group Learning Solutions Visual-Mesh Tutorials 15 JMI, July-06 , Click on OK to confirm. The new surface will be created and it will be in Part 4 Surface Creation by Sweep , Post Sweep GUI from Surface menu (Surface -> Sweep (Drag) ) , Make sure that the default options in the GUI are Multiple Curves, Distance 200 and Part ID 4. , Pick one edge of the blend surface created in the previous step When Vector Definition panel is posted see that the default option , method will be Global Axis with X – Axis. If required use Flip option to get the proper surfaces between the Rib and the Ground Plate , Follow the same above steps and generate 3 more sweep surfaces by selecting the remaining 3 edges of the blend surface. Surface Transform , Post Surface Transform GUI from Surface menu (Surface -> Transform) ESI Group Learning Solutions Visual-Mesh Tutorials 16 JMI, July-06 , Toggle on Fix option for Y Axis and Z Axis and enter -200 in the dX field , Select the Surface created by blend of Part 4 and confirm by clicking on Update Entities , Make a Copy of the surfaces at the other end. It should be as like done for the Ground Plate or the Rib This finishes modeling of the Gap modeling and also modeling of all the surfaces. Now you need to model the curves which will be used to represent the different heat zones of the weld model. For this once again display the IDs of all the nodes. Curves Generation Nodes Transform , Post Nodes Transform GUI from Nodes Menu (Nodes -> Transform) , Select the Node 12 and confirm by middle mouse button on click on Update Entities ESI Group Learning Solutions Visual-Mesh Tutorials 17 JMI, July-06 , In the posted GUI, Fix X and Z axis. Enter -10 in the dY field and toggle on the Copy option , Copy the node by clicking on button Copy , Similarly select the Node 11 and confirm by middle mouse button on click on Update Entities , Fix X and Z axis. Enter 10 in the dY field Copy the node by clicking on Copy , select the Node 9 and confirm by middle mouse button on click on Update Entities , Fix X axis and Y axis, free the Z Axis. Enter 10 in the dZ field Copy the node by clicking on Copy , The new Nodes will have the IDs 13, 14 & 15. Nodes Creation by Node Drop , Post Drop Points/Curves/ Nodes GUI from Nodes menu. (Nodes -> Drop (Project)) , With all defaults options, select the Nodes 10, 11, 12, 13 & 14 (all nodes at the Top Edge of the Ground Plate) and confirm by middle mouse button or click on Update Entities , Click on Select Surfaces and pick the bottom surface of the Ground Plate ESI Group Learning Solutions Visual-Mesh Tutorials 18 JMI, July-06 , Make sure that the option is to make a Copy of nodes Confirm the Copying of the Node by clicking on OK. , , Select Nodes 9 & 15 and confirm. , Select the back surface of the Rib to drop the nodes on it as shown in the below picture. ESI Group Learning Solutions Visual-Mesh Tutorials 19 JMI, July-06 , Confirm the Copying of the Node by clicking on OK and close the GUI Node Align To make sure that the dropped nodes are on the edge of the face, use align node option , Post Align Nodes/Elem. Edges GUI from Node menu (Node -> Align) ESI Group Learning Solutions Visual-Mesh Tutorials 20 JMI, July-06 , Change option Curve to align , Pick the edge of the surface on which the nodes are lying. It will be highlighted. , Now pick all the nodes on that edge and confirm. , Do the same for all the edges where the nodes are located. This is to insure that the nodes are indeed on the edge. Creating Curve by Sketch , Post Sketch GUI from Curve menu (Curve -> Sketch) , With all the default options pick the pairs of nodes that are original and copied by drop options in the earlier step , See the below picture for the curves to be created in the below picture , Once the pair of nodes is selected confirm by middle mouse button to accept the created Curve. , Make sure that the Curves will be in Part 5 ESI Group Learning Solutions Visual-Mesh Tutorials 21 JMI, July-06 Note: To make sure the picked point is on the Node only follow the below procedure. , Pick the first node for the first Curve. It shows the point handle by Curve (a Mark) , Once again click on the same node or the Point handle; it posts a point definition GUI as shown below. ESI Group Learning Solutions Visual-Mesh Tutorials 22 JMI, July-06 , Click on Node in the Snap to option and pick the same node. , This will insure that from here onwards if the point is picked near the node, it will get snapped to the node. Nodes Creation between Points , Fit the model in the window by hitting ‘F’ Key , Change the Display Mode by clicking on the icon , Post Between 2 Points GUI from Nodes menu. (Nodes -> Between 2 Points) , Toggle of Nodes at Ends option and enter 1 for Number of Nodes , Pick the nodes 2 & 14 to create Node 23. Similarly create Node 24 and 25. , See the below picture for the nodes to be created ESI Group Learning Solutions Visual-Mesh Tutorials 23 JMI, July-06 Nodes Creation by Transform , Post Node Transform GUI from Nodes menu (Nodes -> Transform) , Fix: Y Axis and Z Axis and keep only option to Copy the nodes in X Axis , Enter -200 in dX field and make sure that the Copy option is on. ESI Group Learning Solutions Visual-Mesh Tutorials 24 JMI, July-06 , Select Nodes 25, 13, 14, 23, 15 and 24 and confirm by middle mouse button. (See the above picture) , Click on Copy and close the GUI Node Align To make sure that the transformed nodes and the original nodes are on the edge of the face, use align node option. The procedure has to be followed as earlier. , Post Align Nodes/Elem. Edges GUI from Node menu (Node -> Align) , Change option Curve to align ESI Group Learning Solutions Visual-Mesh Tutorials 25 JMI, July-06 , Pick the edge of the surface on which the nodes are lying. It will be highlighted. , Now pick all the nodes on that edge and confirm. , Do the same for all the edges where the nodes are located. This is to insure that the nodes are indeed on the edge. Creating Curve by Sketch , Post Sketch GUI from Curve menu (Curve -> Sketch) , Change the Part ID to 6 for the new Curves. , With all the default options pick the pairs of nodes that are original and copied by drop options in the earlier step , All the new curves should be parallel to Global X Axis , Once the pair of nodes is selected confirm by middle mouse button to accept the created Curve. Parts Management When the entities are generated in different parts, the Parts are created with the default name. With the help of Part Manager we need to give proper names to the parts. , Post Part Manager from Assembly Menu or simply by hitting F11 , In the NAMES column, click on the default name for the part and change the part name accordingly. See the below Part Manager with the part names to be given ESI Group Learning Solutions Visual-Mesh Tutorials 26 JMI, July-06 Cross check the Explorer for the names of the Parts as entered in the Part Manager Saving the Model The model can be saved in different formats. To save VDB format , In the main menu, click File -> Save as … , Choose the path and the file name as T-Joint.vdb and confirm To Export the Model in IGES format , In the main menu, click File -> Export… , Choose the path and the file name as T-Joint.igs and confirm The free nodes that we have in the model were only for the modeling purpose. These nodes now can be deleted before saving the model ESI Group Learning Solutions Visual-Mesh Tutorials 27 JMI, July-06 Visual-Mesh V3.0 ESI Group Learning Solutions Visual-Mesh Tutorials 28 JMI, July-06 Tutorial 14: ‘T’ Weld Joint VTS-3.0-ME-AT-12 This working document and related know-how herein provided by ESI Group subject to contractual conditions are to remain confidential. The client shall not disclose the documentation and/or related know-how in whole or in part to any third party without the prior written permission of ESI Group Copyright ? ESI Group, 2007. All rights reserved. ESI Group Learning Solutions Visual-Mesh Tutorials 29 JMI, July-06 Prerequisites: Execute the Tutorial 13 and also it is recommended to have familiarity with the basic features of Visual Mesh. Objective: In this tutorial you will learn how to create 1D, 2D & 3D mesh with the use of Surface and Curve using Visual Mesh which should be applicable for Welding Joint Description: The requirement for the weld joint mesh is to have very fine elements at the heat affected zone. And also as the region falls away from the Heat zone, the mesh should get coarsen. There should least number of elements with very fine elements at and near the Filler Material. This makes structured mesh for the weld joint. This tutorial gives the way to mesh a ‘T’ Weld Joint. Outline: Loading Model .................................................................... 错误～未定义书签。162 Meshing Filler Material and Heat affected Zone ............. 错误～未定义书签。162 Meshing the Region Away from Hear Affected Zone ..... 错误～未定义书签。164 Meshing the GAP 1D Element Creation and Removing Duplicate Nodes Saving the Model Duration: This tutorial will take approximately 25 minutes to execute. Files used: This tutorial uses a model, T-Joint.igs ESI Group Learning Solutions Visual-Mesh Tutorials 30 JMI, July-06 Loading Model , Invoke Visual-Mesh. , Click File -> Open. Set Files of type to ALL files (*.*) , Choose the file T-Joint.igs and click Open to open the file , Change the display mode to Flat Wireframe by clicking on button , Rotate the model in the model window and observe it from all sides Meshing Filler Material and Heat affected Zone Surface Cleanup , Keep the model in the Isometric View mode by clicking on the icon , Post Surface Cleanup GUI from Surface menu (Surface -> Cleanup) , Change the cleanup method to Stitch , Select the front faces of the Ground Plate, Rib and Weld Bid as shown in the below picture ESI Group Learning Solutions Visual-Mesh Tutorials 31 JMI, July-06 , Confirm the Stitching of the 3 Surfaces into 1 surface by clicking on Check Surfaces and close the GUI 2D Mesh generation by Topology , Locate the stitched surface by selecting the surfaces and hitting the ‘L’ key , Expand the Part folder in the Explorer. Right click on the Part 5 (Base Curve 5) and select Show to see the curves in it. ESI Group Learning Solutions Visual-Mesh Tutorials 32 JMI, July-06 , Post Topo Mesh GUI from 2D Menu , Click on Create Topo and pick the located surface , In the Mesh block of the Topo Mesh GUI, enter Element Size as 2 and click on Re-Seed All ESI Group Learning Solutions Visual-Mesh Tutorials 33 JMI, July-06 , Click on the toggle in-front of Split Face in Edit Group to change the splitting by Curves from Point , Click on Split Face and pick the all the curves on the surfaces. Now we need to mesh only the Heat Zone of the weld which is around the Filler material and Gap , Click on Delete Face and pick the 3 faces at the ends of the Topology , The new topology will look like as shown in below picture. ESI Group Learning Solutions Visual-Mesh Tutorials 34 JMI, July-06 , Toggle on the Edge Handle in the Mesh group (See the picture below) ESI Group Learning Solutions Visual-Mesh Tutorials 35 JMI, July-06 , For the Count in Edge Group, enter 4. Click on Set to Edge and pick all the edges on which the count is 5 , See the above picture. There are 3 edges on which the count is 2 and rest of the edges the count is 4. , Toggle off the Edge Count , Enter the Part ID as 11 ESI Group Learning Solutions Visual-Mesh Tutorials 36 JMI, July-06 , Go to the Method tab of the Mesh group and change the mesh Method to Map. , Click on Select Corner Points and pick the 3 corners of the triangular face of the Topology , Click on Mesh all Faces and see that all the faces are meshed as shown in the picture above. , Click on Detach Mesh and pick the mesh in the model window. This will detach the mesh from the topology and any further operation on the topology will not remove the mesh on it. , Click on Delete Topo button at top. This will delete the current Topology on in the model. Close the Topo Mesh GUI. Map mesh with Corner Points Any complex face can be Meshed like a simple Rectangular or Triangular face to get a structured regular mesh as is done on all the faces here. To do this pick 3 or 4 corner points and make it virtual Rectangular or Triangular face. The above face where 3 corner points are defined because this face have 4 vertices or corners or fixed points and making a Triangular face we need to pick the 3 points ESI Group Learning Solutions Visual-Mesh Tutorials 37 JMI, July-06 3D Mesh by Sweep , Right click in the model window and select Show All , Post Sweep -3D GUI from 3D menu (3D -> Sweep (Drag) ) , Change Sweeping option to Curves from Smooth Points , Select all the 2D Elements by box pick and confirm by clicking on Update Faces or middle mouse button , For Sweeping curve select any of the curve parallel to X-Axis and confirm by clicking on Mesh ESI Group Learning Solutions Visual-Mesh Tutorials 38 JMI, July-06 , This posts Mesh – 3D GUI , Change No. of Layers to 100 and Toggle on No. of Layers display option, , Enter Part ID to 21 and click on Mesh and then Ok to confirm the mesh generation. , Close Sweep – 3D GUI Visualization of CAD and FE , Change the Model Explorer to Part Table , Change for the FE entities visualization option and right click on the DM column header and pick Flat Shaded Wire Frame display mode. ESI Group Learning Solutions Visual-Mesh Tutorials 39 JMI, July-06 , Change for the CAD entities visualization option and right click on the DM column header and pick Wire Frame display mode. , See the changes in the model window , ESI Group Learning Solutions Visual-Mesh Tutorials 40 JMI, July-06 Meshing the Region Away from Heat Affected Zone 2D Mesh generation by 3/4 Point Mesh , Post 3/4 Point Mesh GUI from 2D Menu (2D –>3/4 Point Mesh) , Select the 4 Points at the Topo of the Ground plate as shown in the below picture. , Two points are at the corner nodes of the 3D Mesh and two at the end of the Curve in Part 6 ESI Group Learning Solutions Visual-Mesh Tutorials 41 JMI, July-06 , Click on the Mesh in the 3/4 Point Mesh , In the posted Mesh – 2D GUI toggle on Edge Count. Change Element Size to 4 , Make sure none of the checks are on in the Advance Tab. In the ID Tab give Part ID as 12 , Make sure that there will be count of 50 on Longer Edges and 5 on Shorter Edges. , Create Mesh and click on Ok to accept and close the GUI. ESI Group Learning Solutions Visual-Mesh Tutorials 42 JMI, July-06 , Again select the 4 Points at the Topo of the Ground plate as shown in the below picture. , Two points are at the ends of the Top edge of the Ground plate and two at the end of the Curve in Part 6 , Click on the Mesh in the 3/4 Point Mesh ESI Group Learning Solutions Visual-Mesh Tutorials 43 JMI, July-06 , In the posted Mesh – 2D GUI change Element Size to 8. Keep all the other options as previous. , Make sure that there will be count of 25 on Longer Edges and 3 on Shorter Edges. , Create Mesh and click on Ok to accept and close the GUI. , Close the 3/4 Point Mesh GUI Splitting 2D Elements for Joining , Hide the parts 11 and 21 from the Explorer , Keep the model in XY view by clicking on , Post Split GUI from 2D Menu (2D –> Split–2D) , Select the splitting method by Point and select the Elements of the last row by dragging a box around them. , Confirm the elements selection by clicking middle button or on Update Elem. Sel. Button in the GUI ESI Group Learning Solutions Visual-Mesh Tutorials 44 JMI, July-06 , Pick the points in the model window as shown in the below pictures. The points should be picked so that it will lie approximately at the center of the element. If required, zoom in the model to see the elements properly and pick the points. Also it is not necessary to pick all elements on bottom row at once. Few of the elements can be picked and splitted before going for next , After splitting all the elements the model will look like as below ESI Group Learning Solutions Visual-Mesh Tutorials 45 JMI, July-06 , Select the Elements of the last row of the big elements of size 8 by dragging a box around them. , Confirm the elements selection by clicking middle button or on Update Elem. Sel. Button in the GUI , Pick the points in the model window as shown in the below pictures. The points should be picked so that it will lie approximately at the center of the element , Confirm the splitting by clicking the middle mouse button and close Spit - 2D GUI ESI Group Learning Solutions Visual-Mesh Tutorials 46 JMI, July-06 Locate Part 12 and see how the mesh after split looks like. Connecting the 2D Elements and Smoothing , Post Coincident Node GUI from Checks panel , Click on Check button and see the coincident nodes with the + mark in the model window , Click on Fuse all in the Fuse Nodes option and accept the fusing by clicking on OK , Post Smooth-2D GUI from 2D menu (2D -> Smooth) , Select all the displayed elements by box pick or Shift + A and click on Update Elements , Click on OK to accept the smoothing and close the GUI ESI Group Learning Solutions Visual-Mesh Tutorials 47 JMI, July-06 , After smoothing the elements will look like as shown below 3D Mesh by Sweep , Right click in the model window and select Show All , Change the Model Explorer to Part Table , Change for the FE entities visualization option Flat Shaded Wire Frame , Change for the CAD entities visualization option Wire Frame , Keep the model in Isometric View by clicking on icon and then Fit the model in window , Post Sweep -3D GUI from 3D menu (3D -> Sweep (Drag) ) , Change Sweeping option to Curves from Smooth Points , Click on Select Faces and select the 2D Elements of part 12 by setting the entity selector as Elements by Part , Pick the Part 12 from the model window or enter 12 in the LIST filed of Entity Selector and confirm by clicking middle mouse button or clicking on Update Faces in the GUI , For Sweeping curve select vertical small edge of the Ground Plate and confirm by middle mouse button. , Click on Mesh which will post Mesh – 3D GUI ESI Group Learning Solutions Visual-Mesh Tutorials 48 JMI, July-06 , Change No. of Layers to 4 and Toggle on No. of Layers display option, , Enter Part ID to 22 and click on Mesh and then Ok to confirm the mesh generation. , Close Sweep – 3D GUI Close all the GUIs and see the mesh Generated in Part 21 and 22 in Shaded WF mode ESI Group Learning Solutions Visual-Mesh Tutorials 49 JMI, July-06 Follow the steps of this section (Meshing the model which is away Heat affected Zone) and mesh the remaining portion of the model. Mesh the other side of the Ground Plate and the Rib. Once the mesh is generated the full meshed model with solids will look like as below. Meshing the Gap There is Gap between the Rib and the Ground Plate which is filled by gap material. Follow below steps to fill it by 3D Mesh. 2D Mesh generation by 3/4 Point Mesh , Post 3/4 Point Mesh GUI from 2D Menu (2D –>3/4 Point Mesh) , Select the 4 Points at the end of the Gap between Rib and the Ground Plate. See the below figure for the Points to be selected. ESI Group Learning Solutions Visual-Mesh Tutorials 50 JMI, July-06 , Confirm the points selection and click on Mesh button , In the posted Mesh – 2D GUI, Enter the Element Size as 2, toggle on Edge Count and change the count to 2 & 4 on shorter and longer edges respectively by dragging the handle in the model window. , In the GUI give Part ID as 13 and with Map meshing Method create the Mesh. , Close both the GUIs and see the mesh generated in Part 13. ESI Group Learning Solutions Visual-Mesh Tutorials 51 JMI, July-06 3D Mesh by Sweep , Rotate the model to see the back of the Weld Filler material where the Gap can be seen clearly , Post Sweep -3D GUI from 3D menu (3D -> Sweep (Drag) ) , Change Sweeping option to Smooth Points , Click on Select Faces and select the 2D Elements of part 13 by setting the entity selector as Elements by Part , Pick the Part 13 from the model window or enter 13 in the LIST field of Entity Selector and confirm by clicking middle mouse button or clicking on Update Faces in the GUI , For Sweeping points at the 2 ends of the Gap (See the picture below) and confirm by middle mouse button. ESI Group Learning Solutions Visual-Mesh Tutorials 52 JMI, July-06 , Click on Mesh which will post Mesh – 3D GUI , Change No. of Layers to 100 and Toggle on No. of Layers display option, , Enter Part ID to 23 and click on Mesh and then Ok to confirm the mesh generation. , Close Sweep – 3D GUI This will complete the 3D Mesh generation. But there are the cracks or duplicate nodes in 3D elements of different Parts. Follow the below procedure to close the gap between the Parts 1D Element Creation and Removing Duplicate Nodes 1D Elements Creation , Keep the model in Isometric View by clicking on icon and then Fit the model in window ESI Group Learning Solutions Visual-Mesh Tutorials 53 JMI, July-06 , Post Sketch Curve GUI from Curve menu (Curve -> Sketch) , Change Part ID to 7 and keep all other options default , Pick the 2 nodes of the Filler Material as shown below , Make sure that when a Curve will be generated it will be at center of the top rectangular face of the Filler material , Accept the Curve and close the GUI , Post On Curve -1D GUI from 1D menu (1D -> On Curve) , Change the Number of Elements to 100 and Part ID to 24 , Select the Curve generated in the above step which is in Part 7 and accept by using middle mouse button or clicking on OK , See the preview of the 100 1D elements which will be generated. , Accept the 1D Elements creation and close the GUI ESI Group Learning Solutions Visual-Mesh Tutorials 54 JMI, July-06 Removing the Duplicate nodes , Post Coincident Node GUI from Checks panel (Checks -> Coincident Nodes) , Click on Check button and see the coincident nodes with the + mark in the model window , Click on Fuse all in the Fuse Nodes option and accept the fusing by clicking on OK , Close the Coincident Node GUI This completes the modeling of the ‘T’ Weld Joint. All the CAD and the 2D elements can be deleted if required. Also empty parts can be deleted from the Part Manager or from the Explorer. The final model will look like as shown in the below picture. ESI Group Learning Solutions Visual-Mesh Tutorials 55 JMI, July-06 Saving the Model The model can be saved in different formats. To save VDB format , In the main menu, click File -> Save as … , Choose the path and the file name as T-Joint.vdb and confirm To Export the Model in SYSTUS format , In the main menu, click File -> Save as … , Choose the path and the file name as T-Joint.ASC and confirm ESI Group Learning Solutions Visual-Mesh Tutorials 56 JMI, July-06 ESI Group Learning Solutions Visual-Mesh Tutorials 57 JMI, July-06