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偏应力对材料层裂强度影响的实验研究

DOI: 10.11858/gywlxb.2008.02.003, PP. 125-130

Keywords: 层裂强度,偏应力场,预应力状态,球面层裂

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Abstract:

采用热装配方法对平面样品施加径向应力,获得不同程度的偏应力,通过轻气炮实验获得了不同预应力下LY12铝合金层裂信号,结果表明:即使在相同撞击速度下,材料的层裂强度差异也发生明显变化。偏应力越大,材料的层裂强度越小,由于不同的球面层裂具有不同的偏应力场,通过本实验方法有可能将球面层裂与一维平变下的层裂联系起来。

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