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Material Property Checks for MAT3

Material Property Checks for MAT3

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Material Property Checks for MAT3

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MAT3 only applies to axisymmetric elements.

Material Requirements

MAT3

Mathematical

If EX = 0, ETH = 0, EZ = 0 or

NUXTH * NUTHX + NUTHZ * NUZTH + NUZX * NUXZ + 2 * NUXTH * NUTHZ * NUZX = 1,

an error termination will occur (See comment 1).

Semi-stability

If EX < 0, ETH < 0, EZ < 0 or GZX < 0, an error termination will occur.

PARAM,CHECKMAT,NO will disable this error.

Not all zeros

If GZX = 0, a warning is provided.

Consistency

none

Comments

1.By substitution of

mat3_checks

into

NUXTH * NUTHX + NUTHZ * NUZTH + NUZX * NUXZ + 2 * NUXTH * NUTHZ * NUZX = 1,

it can be expressed in terms of

mat3_checks2