作　　者： (钱杰）; (韩靖）; (胡鸣）;

机构地区： 安徽理工大学能源与安全学院,安徽淮南232001

出　　处： 《煤矿安全》 2017年第8期20-22,共3页

摘　　要： 为探究煤岩在动态拉伸载荷下的力学特性,基于ABAQUS显示算法,建立了分离式霍普金森拉杆(SHTB)实验系统模型,选用并改进了朱-王-唐(Z-W-T)本构模型,对煤岩在高应变率下的应力应变关系进行研究。结果表明:数值模拟建立SHTB的实验系统能够实现恒应变率加载,改进后的煤岩本构模型能够较好地符合其在动载荷下的力学行为,煤岩在动态拉伸载荷下表现出了明显的应变率和应变硬化效应。 On the basis of ABAQUS explicit solution, split-Hopkinson tension bar（SHTB） model is built up to investigate the mechanical properties of coal and rock under dynamic tensile impact loading. Thus, the constitutive model of Z-W-T is selected and improved to research the stress-strain relation under high strain rate. The results show that the SHTB system established in this numerical simulation is able to realize a steady strain-rate loading. Besides, the improved constitutive model describes its mechanical behavior well. The strain-rate effect and strain hardening effect is obvious in coal＇s dynamic tension.

关 键 词： 煤岩 动态拉伸 霍普金森拉杆 力学特性 应力应变关系