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通过将作者发展的广义自洽有限元迭代平均化方法同用于描述金属塑性损伤的Gurson本构模型相结合,对SiC增强Al5456的细观损伤机制与其宏观性质的关系进行了参数研究。金属基体的细观损伤机制包括两种形式,增强相与金属基体之间界面的脱开及基体内孔洞的成核、长大与汇合。结果表明,界面的脱开增大了金属基复合材料的塑性,但导致了增强相增强作用的降低。
Through the generalized self-consistent finite element iterative averaging method developed by the author and the Gurson constitutive model used to describe metal plastic damage, the parameters of the relationship between the meso-damage mechanism of SiC reinforced Al5456 and its macroscopic properties were studied. The meso-damage mechanism of the metal matrix includes two forms, which enhance the detachment of the interface between the phase and the metal matrix and the nucleation, growth and convergence of the pores in the matrix. The results show that the interfacial delamination increases the plasticity of the metal matrix composites, but leads to the decrease of reinforcing effect.