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2458030525新虫 (小有名气)
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[求助]
求救The stress-strain matrix of material 1 is not positive definite,
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The stress-strain matrix of material 1 is not positive definite, which is required for real materials. Being positive definite means that 1.0 - NUXY**2*EX/EY - NUYZ**2*EY/EZ - NUXZ**2*EX/EZ - 2.0*NUXY*NUYZ*NUXZ*EX/EZ must be positive, but is equal to -495237.185. Consider reducing the Poisson's ratios. 请问高手这是什么原因?材性是别人用过的,应该不会错,求救! |
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