岩土力学2017，Vol.38Issue(6)：1805-1812,8.DOI:10.16285/j.rsm.2017.06.031
岩石材料冲击压缩特性细观模拟方法研究
Mesoscopic numerical simulation method of the shock compression properties of rock materials
摘要
Abstract
It is known that mesoscopic characteristics of rock materials have a significant effect on its macroscopic mechanical properties.Based on the electron micrograph of mesostructure of typical rock materials,a mesoscopic simulation model was established to investigate the shock compression behavior of rock materials with different mesostructures,such as particle morphology,porosity and water.Numerical studies of mesoscopic behaviors were conducted on rock materials during the compressive processes using ANSYS Autodyn software.We obtained the effect of particle morphology,porosity and water on shock compressive properties at mesoscale.The Hugoniot parameters of rock materials with different mesostructures were determined,which were further applied in the impact cratering process simulations.The results show that both the Hugoniot parameters at mesoscale and the results of cratering process simulation are in good agreement with existing experimental counterparts in the literature.It is found that the porosity and water content have an obvious negative effect on the shock wave propagation in rock materials.The Hugoniot parameters determined by the mesoscopic simulation are applied to predict dynamic responses of rock materials,which can effectively reflect the effect of particle morphology,porosity and water content on impact cratering.关键词
岩石材料/冲击压缩/细观模型/Hugoniot Data/数值模拟Key words
rock materials/shock compression/mesoscopic model/Hugoniot Data/numerical simulation分类
建筑与水利引用本文复制引用
伍杨,张先锋,熊玮,潘建,乔良,郭磊..岩石材料冲击压缩特性细观模拟方法研究[J].岩土力学,2017,38(6):1805-1812,8.基金项目
爆炸科学与技术国家重点实验室开放基金项目(No.KFJJ15-07M) （No.KFJJ15-07M）
瞬态冲击技术重点实验室基金项目(No.61426060101162606001).This work was supported by the Foundation of State Key Laboratory of Explosion Science and Technology (KFJJ15-07M) and Science and Technology on Transient Impact Laboratory (61426060101162606001). （No.61426060101162606001）
