S9-1 PAT328, Section 9, September 2004 Copyright 2004 MSC.Software Corporation SECTION 9 SUPPORT OF MSC.NASTRAN PLY DEFINITION (PCOMPG) BY MSC.PATRAN v2005

S9-2 PAT328, Section 9, September 2004 Copyright 2004 MSC.Software Corporation

S9-3 PAT328, Section 9, September 2004 Copyright 2004 MSC.Software Corporation MSC.NASTRAN LAYER RESULTS (PCOMP) n Previously an n-ply composite material laminate was specified using the PCOMP entry of MSC.Nastran. The laminate material (layer) format was used, as opposed to the ply format. n The results from MSC.Nastran were in layer (at a constant value of z, where z is a coordinate normal to a shell element), as opposed to ply format. n MSC.Patran was only able to u Output PCOMP MSC.Nastran entries u Read results directly from MSC.Nastran in layer, not ply, format n Now u MSC.Patran can output PCOMPG MSC.Nastran entries. u MSC.Patran can read directly MSC.Nastran ply based stress results.

S9-4 PAT328, Section 9, September 2004 Copyright 2004 MSC.Software Corporation MSC.PATRAN 2005 SUPPORTS MSC.NASTRAN PLY (PCOMPG) n MSC.Patran / MSC.Laminate Modeler used to create a laminate (layup) model u As previously the geometry, mesh, constraints, loads, and basic materials (e.g. 2d Orthotropic) are created using MSC.Patran. u MSC.Laminate Modeler accesses the mesh and material properties u Plys and a layup are created using MSC.Laminate Modeler u It is possible to create the plys and layup using other software u MSC.Laminate Modeler creates material and element properties in MSC.Patran n MSC.Patran creates bulk data file for MSC.Nastran, including ply (PCOMPG) entries u Nodes (GRIDs) and elements (e.g. CQUAD4), constraints, loads created u PCOMPG data is created n MSC.Nastran run, e.g. linear statics u Ply based stress is obtained, as opposed to layer (zone) based stress n MSC.Patran used to display ply stress directly from MSC.Nastran u Ply based stress selected under a result case position, e.g. Position…(Layer 1003), where Layer 1003 refers to ply 3

S9-5 PAT328, Section 9, September 2004 Copyright 2004 MSC.Software Corporation EXAMPLE: SIMPLE MODEL A composite plate is reinforced with two strips of material, oriented perpendicular to each other

S9-6 PAT328, Section 9, September 2004 Copyright 2004 MSC.Software Corporation The model is clamped (all 6 DOFs constrained) on one of its edges Further, the model is pinned (DOFs 1-3 constrained) at two central points opposite the clamped edge Point loads are applied, normal to the plate, centrally at four points and at two corners opposite the clamped edge An image of the FEM is shown as follows The plys and layup are completed MSC.Nastran is run, and the results obtained EXAMPLE: SIMPLE MODEL

S9-7 PAT328, Section 9, September 2004 Copyright 2004 MSC.Software Corporation MSC.Nastran results viewed directly by layer, not ply EXAMPLE: SIMPLE MODEL Layer 1 Layer 2 Layer 3

S9-8 PAT328, Section 9, September 2004 Copyright 2004 MSC.Software Corporation MSC.Nastran results viewed directly by ply, not layer (at a level (constant value of z)) EXAMPLE: SIMPLE MODEL Layer 1001 Layer 1002 Layer 1003

S9-9 PAT328, Section 9, September 2004 Copyright 2004 MSC.Software Corporation EXERCISE Perform Workshop 8 Viewing Results for MSC.Nastran Ply PCOMPG Entries Using MSC.Patran v2005 in your exercise workbook

S9-10 PAT328, Section 9, September 2004 Copyright 2004 MSC.Software Corporation