绝热剪切研究进展

从实验技术、分析手段和数值模拟技术等三方面对近年来绝热剪切研究相关的工作成果进行了总结和评述,指出了现有工作的不足,即:尚不明了绝热剪切带内微观组织演化规律及尚未建立相应的力学模型;绝热剪切带的静水压相关性仍有待进一步探索;描述绝热剪切的自组织行为的模型需进一步完善;绝热剪切数值模拟精度有待提高等。最后,结合国内外最新的研究动态对绝热剪切研究的发展趋势提出了自己的观点。

Progress in Research on Adiabatic Shearing

Recent progress and achievements of adiabatic shearing study were reviewed based on the experimental techniques, analysis methodology and numerical simulation. Some shortcomings in existing investigation were indicated. That is: the microstructure characteristics in adiabatic shear bands are still unclear, the corresponding mechanical model is not established yet; the pressure sensitivity of adiabatic shear bands remains not fully explored; the shear band spacing depends on the constitutive relation employed, model describing the self organization of multiple shear bands remains to be further perfected; the numerical simulation accuracy of adiabatic shear bands needs to be improved. Finally, the future development trends of adiabatic shearing investigation are presented in this paper based on the domestic and overseas up to date developments.