To pass the patch test, the constant strain matrix is modified.

通过修正常应变矩阵，确保单元通过分片检验。

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Thus the theory of constant power matrix equation is enriched.

丰富了定功率矩阵方程序分析理论。

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Thus the theory of constant power matrix equation is enriched.

丰富了定功率矩阵方程序分析理论。

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