采矿与安全工程学报Issue(1)：158-164,7.DOI:10.13545/j.cnki.jmse.2016.01.025
基于HJC本构模型的煤岩SHPB实验数值模拟
Numerical simulation of SHPB tests for coal by using HJC model
摘要
Abstract
By using the Holmquist-Johnson-Cook (HJC), the constitutive model, the Φ50 mm split Hopkinson pressure bar (SHPB) tests for coal have been numerically simulated with the finite element analysis software LS-DYNA. The simulation results have reoccurred the stress waves shape, stress vari-ation and the destruction process of coal specimen during the SHPB tests. By contrast, it has been found that the numerical simulation is similar to the experiment results, and that the dynamic destruction pro-cess of coal specimen during the SHPB tests can be reoccurred reasonably with HJC constitutive model. The numerical simulation has shown that:1) The coal specimens have been destroyed firstly from around with the destruction mode of splitting failure in the axial direction mainly. 2) When the impact velocity is about 3 m/s, the destruction of the coal is caused by both compression and tensile;When im-pact velocity is about 9 m/s, the destruction of the coal is caused mainly by compression. 3) The de-struction of the coal is out of sync with the peak stress:when the dynamic load is lower, the destruction of coal specimens lags behind the stress peak;when the dynamic load is higher, the destruction of coal specimens is ahead of the stress peak.关键词
煤岩/霍普金森压杆/HJC本构模型/冲击破坏Key words
coal/split Hopkinson pressure bar/Holmquist-Johnson-Cook constitutive model/impact damage分类
矿业与冶金引用本文复制引用
李成武,王金贵,解北京,孙英峰..基于HJC本构模型的煤岩SHPB实验数值模拟[J].采矿与安全工程学报,2016,(1):158-164,7.基金项目
国家自然科学基金项目(51274206) （51274206）
