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代码说明：

说明：  关于复合材料刚度折减，以及损伤演化的用户子程序。程序程序程序程序程序(The commercial FEM software ABAQUS has both powerful capacity for numerically solving varied large-scale nonlinear problems in engineering practice and user-friendly possibility for extending material libraries to consider the given constitutive model of a specific material.)

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1.for