MSC Nastran N is for NonLinear as in SOL400. Shekhar Kanetkar, PhD
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1 MSC Nastran N is for NonLinear as in SOL400 Shekhar Kanetkar, PhD
2 AGENDA What is SOL400? Types of Nonlinearities Contact Defining Contact Moving Rigid Bodies Friction in Contact S2S Contact CASI Solver Live Demo
3 AGENDA What is SOL400? Types of Nonlinearities Contact Defining Contact Moving Rigid Bodies Friction in Contact S2S Contact CASI Solver Live Demo
4 What is SOL400? SOL 129 Town SOL 106 Town Segment-Segment Contact (No More Gaps) Larger than 5% Strain Large Displacement MPCs Adv. Thermal Shell Off-sets Faster Solvers Welcome to SOL 400 Town
5 What is SOL400? Existing Nonlinear SOL 106 Nonlinear Statics SOL 129 Nonlinear Transient Marc Advanced Nonlinear New Capabilities + = Improvements 3D Contact Advanced Elements and Materials Large rotation RBEs SUBCASE STEP HHT Integration Method Friendly Restart Rotor Dynamics Nonlinear Transient Thermal Load Temperature Dependent Composites Thermal Structural Coupled Advanced Nonlinear SOL 400
6 AGENDA What is SOL400? Types of Nonlinearities Contact Defining Contact Moving Rigid Bodies Friction in Contact S2S Contact CASI Solver Live Demo
7 Types of Nonlinearities Geometric Nonlinearity Material Nonlinearity Boundary Condition Nonlinearity - Contact
8 Geometric Non-Linearity Large Disp. and Rotations Large Strain Analyses Buckling of Structures Post-buckling behavior Axially Loading Critical Mode
9 Material Non-Linearity Plastic: Small and large strain Hyper-elastic (for Elastomers) Creep Visco-elastic Temperature dependant Properties
10 Boundary Condition Non-Linearity Contact - Touching Bodies - Glued Bodies
11 AGENDA What is SOL400? Types of Nonlinearities Contact Defining Contact Moving Rigid Bodies Friction in Contact S2S Contact CASI Solver Live Demo
12 Define Contact - The Old Way USER must align nodes USER must align CS NO NEED USER must define coincident nodes correctly
13 Define Contact - The Better Way First define the contact bodies
14 Define Contact - The Better Way What the Nastran entries look like List of elements
15 Define Contact - The Better Way Contact Table G T
16 AGENDA What is SOL400? Types of Nonlinearities Contact Defining Contact Moving Rigid Bodies Friction in Contact S2S Contact CASI Solver Live Demo
17 Contact - Moving Rigid Bodies Node 9999
18 Contact - Moving Rigid Bodies Ball Bearings (Rigid Bodies) to Freely Move/Rotate Use Force/Moment Control Node Node 10001
19 Contact - Moving Rigid Bodies How to Rotate Upper Body? Create a Rigid Surface Glue to Top Mesh (Body) Two Control Nodes Apply Disp or Force to those Nodes
20 Contact - Moving Rigid Bodies O ye Hello O ye You Whats Applied up with Rotation that? in Translation Box It s a trick!!! Node has 3 DOF only So Use 2 Nodes O ye 1,2,3 DOFs on second Node are really 4,5,6 DOF on that Rigid Body
21 AGENDA What is SOL400? Types of Nonlinearities Contact Defining Contact Moving Rigid Bodies Friction in Contact S2S Contact CASI Solver Live Demo
22 Friction in Contact - Setup
23 Friction in Contact - Setup
24 Friction in Contact - Setup
25 Friction in Contact - Setup So which Friction coeff is used? In Contact Body? In Contact Table? OR
26 Friction in Contact - Setup Here is the Rule 1. Contact Table Overrides Contact Body Friction Coeff. 2. If Not Specified in Contact Table Average of Body 1 and Body 2 for a Pair of Deformable Bodies Rigid Body Friction Coeff. Is Used for Pair of Rigid Deformable
27 AGENDA What is SOL400? Types of Nonlinearities Contact Defining Contact Moving Rigid Bodies Friction in Contact S2S Contact CASI Solver Live Demo
28 Contact S2S Improved Accuracy Master-Slave Order Not Important Node to Segment Segment to Segment 29
29 Contact S2S Set up
30 AGENDA What is SOL400? Types of Nonlinearities Contact Defining Contact Moving Rigid Bodies Friction in Contact S2S Contact CASI Solver Live Demo
31 Solver Tips Direct vs CASI CASI Solver Solid Elements Not for Shells/Beams/MPCS
32 Live Demo Complete Setup of Contact Bodies
33 Summary MSC Nastran (N for Nonlinear - SOL 400) Need to Model 3D or Multi-Body Contact Shells Face to Face, Edge to Edge, Edge to Face Contact Beam to Beam, Beam to Shell, Beam to Solid Contact Peeling Glue or Permanent Glue (in Contact) Strain Level > 10-15% Elastic-Plastic or Hyper-Elastic Material Properties are Temperature Dependent Need to Model 3D Solid Composites Analysis Chaining Thermal Structural Coupled Solid Shell (Gradient thorugh Thickness)
34
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