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为了探究激光冲击强化对SiCp/Cu复合材料力学性能的影响,采用有限元分析软件ANSYS/LS-DYNA对复合材料单胞模型进行冲击加载,模拟结果显示:在基体金属上存在着广泛的压应力,并且在载荷作用过程中导致了基体的屈服强化,大大提高了基体的强度;在基体与颗粒增强体之间的界面上存在着一定的等效应力值。采用WDW-200微机控制式电子万能试验机对激光冲击强化前后的试样进行拉伸性能对比试验:发现冲击后试样的抗拉强度较未冲击试样的提高了18MPa,且断口呈现韧窝形貌,为微孔聚集形韧性断裂。结果表明:激光冲击强化提高了SiCp/Cu复合材料的力学性能。
In order to investigate the effect of laser shock on the mechanical properties of SiCp / Cu composites, the finite element analysis software ANSYS / LS-DYNA was used to impact the composite cell model. The simulation results show that there is a wide range of compressive stress , And it also leads to the yield hardening of the matrix during the loading process and greatly increases the strength of the matrix. There is a certain equivalent stress value at the interface between the matrix and the particle reinforcement. Using WDW-200 computer-controlled electronic universal testing machine to compare the tensile properties of the samples before and after the laser shock strengthening: The tensile strength of the samples after impact was 18MPa higher than that of the non-impact samples and the fracture was dimple Morphology, micro-pore aggregation toughness fracture. The results show that laser shock strengthening improves the mechanical properties of SiCp / Cu composites.