S4-1 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation SECTION 4 BUILDING COMPOSITE MODELS WITH MSC.PATRAN

S4-2 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation

S4-3 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation n MSC.Patran/MSC.Nastran, MSC.Patran/MSC.Marc, etc. have similar approach to composites n Based on laminate material representation of the layup n Within each laminate material the lamina sequence, material, thickness, and orientation are constant n Orientations of the laminate material can be defined relative to edges of elements, vectors projected onto elements, or relative to coordinate systems SIMULATION APPROACH

S4-4 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation EXAMPLE: CREATE COMPOSITE MODEL USING MSC.PATRAN Material: Directional strength [Pa] E 11 = 40E6, E 22 = 1E6 v 12 = 0.25 G 12 = G 13 = 0.6E6, G 23 = 0.5E6 Ply thickness 0.01 or Ply orientations 0º or 90º = 90º, t= = 0º, t=0.01 = 90º, t= x z y

S4-5 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation EXAMPLE: CREATE COMPOSITE MODEL USING MSC.PATRAN n Step 1: create composite material u In MSC.Patran Materials menu create new 2D orthotropic material u Under Input Properties… enter material data

S4-6 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation n Step 2: create ply layup from material u Stack plies using the ply material property, Lamina EXAMPLE: CREATE COMPOSITE MODEL USING MSC.PATRAN

S4-7 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation n Step 3: create composite structure u Use MSC.Patran (Element) Properties menu u Select Options: Laminate u Use material Laminate with model surface, Surface 1 EXAMPLE: CREATE COMPOSITE MODEL USING MSC.PATRAN

S4-8 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation EXAMPLE: CREATE COMPOSITE MODEL USING MSC.PATRAN n Step 4: request ply stress data u Use Analysis: Analyze/ Entire Model/Full Run l Subcases…/Output Requests… n Advanced u Select Element Stresses, and Ply & Elem. Stresses

S4-9 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation n Step 5: solve for the results u Run MSC.Nastran u Link the results file to MSC.Patran EXAMPLE: CREATE COMPOSITE MODEL USING MSC.PATRAN

S4-10 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation n Step 6: display stress results u Results: Create/Quick Plot u Display stresses for each ply(refered to as Layer in Results) u Layer 1 is always at the bottom of the element u Beware of drop-offs or reversed element directions EXAMPLE: CREATE COMPOSITE MODEL USING MSC.PATRAN

S4-11 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation UTILITIES LAYUP n Currently, there is an alternative tool in Utilities that can be used for building layups. It is under Materials/Laminate Builder Tool...

S4-12 PAT325, Section 4, February 2004 Copyright 2004 MSC.Software Corporation n Perform Workshop 1 Composite Model of Loaded Flat Plate in your exercise workbook n Be sure to ask for help on anything you dont understand EXERCISE