autodyn复合材料模型理论手册.pdf

【核心代码】

Table of Contents
Chapter 1. Introduction.........................................................................................1
Chapter 2. Principal Directions in AUTODYN........................................................2
1. AUTODYN-2D ................................................................................................2
§1. X-Y Space...............................................................................................2
§2. Polar Space ............................................................................................2
§3. I-J Space.................................................................................................3
2. AUTODYN-3D ................................................................................................3
§1. X-Y-Z Space ...........................................................................................4
§2. I-J-K Space .............................................................................................4
Chapter 3. Orthotropic Constitutive Models ..........................................................6
1. Orthotropic Elastic Model................................................................................6
2. Equations of State ..........................................................................................9
§1. Shock Equation of State........................................................................11
§2. Polynomial Equation of State ................................................................12
3. Strength and Hardening Model .....................................................................12
§1. Quadratic Limit Surface.........................................................................13
§2. Stress Return Algorithm ........................................................................15
Chapter 4. Orthotropic Material Failure Models...................................................18
1. Brittle Damage Model ...................................................................................18
§1. Failure Initiation.....................................................................................18
§2. Post-Failure Response..........................................................................19
2. Orthotropic Damage Model...........................................................................22
§1. Failure Initiation.....................................................................................22
§2. Damage Model......................................................................................23
Chapter 5. Material Characterisation Tests.........................................................26
1. Directional Strength Properties .....................................................................26
§1. In-Plane Tension Tests .........................................................................26
§2. Out-of-Plane Shear...............................................................................28
2. Equation of State Properties .........................................................................29
§1. Inverse Flyer Plate Tests ......................................................................29
3. Delamination Properties................................................................................30
§1. Direct Plate Impact - Mode I Delamination Strength..............................30
§2. Double Cantilever Beam – Mode I Delamination Energy.......................31
§3. Double Notch Shear – Mode II Delamination Strength ..........................32
§4. End Notched Flexure - Mode II Delamination Energy............................33
Chapter 6. Derivation of Material Properties .......................................................36
1. Constitutive Properties..................................................................................36
§1. Elastic Properties ..................................................................................36
§2. Plasticity Parameters ............................................................................37
2. Equation of State Parameters.......................................................................40
3. Failure/Softening Properties .........................................................................41
§1. Failure Properties..................................................................................41
§2. Softening Properties..............................................................................42
4. Calculating Laminate Properties from Uni-Directional Data...........................42
Chapter 7. Example Applications........................................................................46
1. Hypervelocity Impacts...................................................................................46
§1. Advanced Material Model for Hypervelocity Impact Simulations............46
§2. Advanced Material Damage Models......................................................48
2. Ballistic Impact Examples .............................................................................51
§1. Ballistic Fragment Impacts on Aramid Composite Plates ......................52
Table of Contents
v Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. – Contains proprietary and confidential information
of ANSYS, Inc and its subsidiaries and affiliates
Published: 2009-11-5.
§2. Polyethylene fibre based armour...........................................................52
3. Bird Strike Example using Composite Shell Elements ..................................53
Chapter 8. Recommendations ............................................................................55
Chapter 9. References........................................................................................56