Example:
Linear Elastic Material definition - Material ID 13 - Young's
Modulus = 21000MPa, Poisson's Ratio = 0.3, 
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(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
MAT1
13
2.1e+11
0.3
7.85e+3
After a mesh is defined, geometric and material properties must be assigned to the elements. The geometric properties are defined on cards starting with the letter P. The PSHELL card, for example, defines a shell property. The geometric property cards also assign the material to a structural component. The geometric property provides the shell thickness for shell models and the cross-sectional properties for truss models. Since the geometry of the structure is defined entirely by the mesh, solid models have no specific geometric properties, but a geometric property card (PSOLID) is still required to assign the material. Select examples of geometric property cards are provided below. For a full list of the geometric properties available in OptiStruct, please see the Properties section on the List of Bulk Data Entries (by function).
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Example: Bar property definition - Property ID 39 - references Material ID 6 - Cross-sectional Area = 2.9, I1 = 8.4, I2 = 5.97, J = 1.1. |
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(9) |
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PBAR |
39 |
6 |
2.9 |
8.4 |
5.97 |
1.1 |
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Example: Shell property definition - Property ID 2 - references Material ID 13 for membrane, bending and transverse shear - Shell thickness of 3.0. |
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(8) |
(9) |
(10) |
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PSHELL |
2 |
13 |
3.0 |
13 |
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13 |
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Example: Solid property definition - Property ID 4 - references Material ID 13. |
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PSOLID |
4 |
13 |
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Material properties are defined on MAT cards. Each different material type defines a different material law. MAT1, for example, defines a linear elastic, homogeneous material. For a full list of the material properties available in OptiStruct, please see the Materials section on the List of Bulk Data Entries (by function). The format of the MAT1 card is shown below as an example:
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Example: Linear Elastic Material definition - Material ID 13 - Young's
Modulus = 21000MPa, Poisson's Ratio = 0.3, |
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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MAT1 |
13 |
2.1e+11 |
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0.3 |
7.85e+3 |
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