摘要：本文应用滑移型裂纹模型并基于裂纹扩展过程中的能量平衡原理，建立了花岗岩材料的动态本构模型。分析结果表明，模型结果与实验结果符合得比较好。本文还进一步分析裂纹扩展引起的非线性应变特征。结果表明，在裂纹的扩展过程中，由于裂纹扩展引起的非线性应变对侧向应变的影响比轴向应变大，初始裂纹的滑移在花岗岩材料的非线性应变的贡献不能忽略。 关键词：裂纹扩展 能量平衡 花岗岩 动态本构 Study on constitutive relation of rock under dynamic compression based on energy balance during crack growth* Abstract: Based on the sliding crack model and energy balance during crack growth， the dynamic constitutive relation of rock under different strain rates is established. It is shown that
