为了对准静态圆弧巴西实验过程中PBX试样的裂纹形成和扩展过程进行模拟,基于EFG方法和内聚力模型,利用LS-DYNA软件的隐式分析模拟计算了实验过程.结果表明,计算结果和文献报道的实验结果吻合较好,证明了该方法的可行性;采用线性内聚力模型可较好地描述PBX炸药的断裂过程,PBX试样的起裂发生在压缩载荷达到峰值后,随着压头的进一步压缩,试样中心的裂纹沿直径向压头方向扩展.%To simulate the crack formation and extension process of PBX sample in the quasi-static circular anvil Brazilian test,based on EFG method and cohesive model,the experimental process was calculated by implicit analysis and simulation of LS-DYNA software.The results show that the calculated results are in good agreement with reported experimental ones in literature,proving the feasibility of the method.The fracture process of PBX can be well described by linear cohesive model.The crack initiation of PBX sample occurs after the compression load reaches the peak value,and with the further compression of compression anvil,the crack of the specimen center extends along the diameter direction to the anvil.
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