Page 71 - 《爆炸与冲击》2026年第8期

第 46 卷 周永旺，等： 基于动静态力学试验下的红砂岩Holmquist-Johnson-Cook本构与数值模拟研究 第 8 期

红砂岩的 HJC 本构模型的 19 个参数进行了确定。确定的 HJC 本构模型参数在 LS-DYAN 中可以较好地
模拟红砂岩在动态冲击的损伤失效过程，在未达到最大峰值应力时，数值模拟与试验的应力-应变曲线基
本一致。确定的致密高强度红砂岩 HJC 本构模型参数可为红砂岩的动态力学性能的研究和工程应用提
供参考。
(2) 随着静水压力的增大，红砂岩的偏应力-应变曲线的线性段和峰值点的范围逐渐增大。在围压环
境下，内部裂纹的扩展方向和程度受到限制，使得裂纹难以快速贯通，从而峰值应力随着静水压力的增
大而增大。
(3) 红砂岩在不同气压的加载下，存在明显率效应现象，动态抗压和劈拉强度与平均应变率呈现正
相关，动态拉伸峰值应力的率效应现象更为明显。

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