WS7-1 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation WORKSHOP 7 CWELD AND CFAST CONNECTORS

WS7-2 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation

WS7-3 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation n Problem Description u Create spot welds and fasteners to connect various surfaces. l Create a set of four spot welds using the axis method l Create four more welds using the projection method l Create four fasteners u Note the options available in Patran for the creation and analysis of these elements. WORKSHOP 7 – CONNECTOR ELEMENTS

WS7-4 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Open the connector database a.File: Open b.Select connector_exercise.db. c.Click OK. b c WORKSHOP 7 – CONNECTOR ELEMENTS a

WS7-5 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 1. Create Four Spot Welds Create four spot welds a.Elements: Create / Connector / Spot Weld b.Set the Method to Projection. c.Enter [ ] [ ] [ ] [ ] as the location list. d.Set the format to Prop to Prop. e.Select an element from the top section. (The properties associated with the element will be selected) f.Select an element from the base section. g.Click Connector Properties. d a b c e g

WS7-6 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 1. Create Four Spot Welds Enter weld properties a.Enter weld1 as the property name for the connector. b.Enter 0.25 as the weld diameter. c.Select steel as the material property set. d.Click OK. d a b c

WS7-7 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 1. Create Four Spot Welds Verify spot welds a.Click Preview. (A plot will be created representing the connectivity and diameter of the welds.) b.Click Apply. a b Note that the Connector locations did not need to match existing nodes.

WS7-8 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 2. Create Four Additional Spot Welds a b Create spot welds using the axis method a.Elements: Create / Connector / Spot Weld b.Set the Method to Axis. c.Enter Node as the Surface A Pierce Nodes. d.Enter Node as the Surface B Pierce Nodes. (Note that the order is important, so the closest nodes get connected.) e.Set the format to Prop to Prop. f.Select an element from the top section. g.Select an element from the base section. h.Click Connector Properties. c d e f g h

WS7-9 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 2. Create Two Additional Spot Welds Enter weld properties a.Select weld1 from the Existing Connector Properties. b.Click OK. a b

WS7-10 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 2. Create Two Additional Spot Welds a b Verify spot welds a.Click Preview. b.Click Apply.

WS7-11 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 3. Create Four Fasteners a b Create fasteners using the projection method a.Elements: Create / Connector / Fastener b.Set the Method to Projection. c.Enter Node as the Node List. (These are four nodes shown highlighted on the base). d.Set the format to Prop to Prop. e.Select the base elements (Elm 757:636). f.Select the tab elements (Elm 937:1116). g.Click Connector Properties. c d e f g

WS7-12 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 3. Create Four Fasteners a b Create fasteners using the projection method a.Enter bolt1 for the Connector Property Name. b.Enter 0.5 for the Fastener Diameter. c.Select coordinate system 0. d.Enter as the stiffness values. Note that stiffness may be different in each direction. e.Leave the Rotational Stiffness set to the default of f.Note that lumped mass of the fastener could be entered if desired. g.Click OK. c d e f g

WS7-13 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 3. Create Four Fasteners a b Verify fasteners a.Click Preview. b.Click Apply.

WS7-14 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 4. Analyze the Model Analyze the model a.Analysis: Analyze / Entire Model / Full Run b.Click Apply. a b

WS7-15 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 4. Analyze the Model Access the results a.Analysis: Access Results / Attach XDB / Result Entities b.Click Select Results File. c.Select connector_exercise.xdb. d.Click OK. e.Click Apply. a e b c d

WS7-16 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 5. View the Results Create a Quick Plot of stresses in the shell elements a.Results: Create / Quick Plot. b.Select Stress Tensor as the Fringe Result. c.Select Displacements, Translational as the Deformation Result. d.Click Apply. a b c d

WS7-17 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation Step 5. View the Results Create a Quick Plot of stresses in the connectors. a.Results: Create / Quick Plot. b.Select Fastener Stress results one at a time and plot them. Also select Weld Stress results one at a time and plot them. a b

WS7-18 PAT328, Workshop 7, September 2004 Copyright 2004 MSC.Software Corporation