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1. Composite Material Modeling Introduction
2. Principal Directions in Autodyn
2.1. Autodyn-2D
2.1.1. X-Y Space
2.1.2. Polar Space
2.1.3. I-J-K Space
2.2. Autodyn-3D Lagrange and ALE Parts
2.2.1. X-Y-Z Space
2.2.2. I-J-K Space
2.3. Autodyn-3D Shell Parts
2.3.1. X-Y-Z Space
2.3.2. I-J-K Space
3. Orthotropic Constitutive Models
3.1. Orthotropic Elastic Model
3.2. Equations of State
3.2.1. Shock Equation of State
3.2.2. Polynomial Equation of State
3.3. Strength Models
3.3.1. Elastic
3.3.2. VonMises
3.3.3. Orthotropic Yield Strength and Hardening Model
3.3.3.1. Quadratic Limit Surface
3.3.3.2. Stress Return Algorithm
4. Orthotropic Material Failure Models
4.1. Brittle Damage Model
4.1.1. Failure Initiation
4.1.2. Post-Failure Response
4.1.2.1. Isotropic Post-Failure
4.1.2.2. Orthotropic Post-Failure Response
4.2. Orthotropic Damage Model
4.2.1. Failure Initiation
4.2.2. Damage Model
5. Material Characterization Tests
5.1. Directional Strength Properties
5.1.1. In-Plane Tension Tests
5.1.2. Out-of-Plane Shear
5.2. Equation of State Properties: Inverse Flyer Plate Tests
5.3. Delamination Properties
5.3.1. Direct Plate Impact - Mode I Delamination Strength
5.3.2. Double Cantilever Beam – Mode I Delamination Energy
5.3.3. Double Notch Shear – Mode II Delamination Strength
5.3.4. End Notched Flexure - Mode II Delamination Energy
6. Derivation of Material Properties
6.1. Constitutive Properties
6.1.1. Elastic Properties
6.1.2. Plasticity Parameters
6.2. Equation of State Parameters
6.3. Failure and Softening Properties
6.3.1. Failure Properties
6.3.2. Softening Properties
6.4. Calculating Laminate Properties from Uni-Directional Data
7. Example Applications
7.1. Hypervelocity Impacts
7.1.1. Advanced Material Model for Hypervelocity Impact Simulations
7.1.2. Advanced Material Damage Models
7.2. Ballistic Impact Examples
7.2.1. Ballistic Fragment Impacts on Aramid Composite Plates
7.2.2. Polyethylene Fiber-Based Armor
7.3. Bird Strike Example using Composite Shell Elements
8. Recommendations
9. References