爆炸与冲击2026，Vol.46Issue(8)：103-116,14.DOI:10.11883/bzycj-2025-0280
基于动静态力学试验下的红砂岩Holmquist-Johnson-Cook本构与数值模拟研究
Static and dynamic mechanical tests and numerical simulation on the Holmquist-Johnson-Cook constitutive model for red sandstone
摘要
Abstract
Rock materials are extensively employed in protective engineering and various civil-works structures such as tunnels;investigating their dynamic mechanical behaviour is therefore of great significance.Red sandstone from a stone quarry in Jinan,was selected as the test material.A triaxial testing machine and a split Hopkinson pressure bar(SHPB)apparatus were used to study the mechanical properties of the sandstone under different confining pressures and strain rates,respectively.On the basis of the static and dynamic test data,the parameters of the Holmquist-Johnson-Cook(HJC)constitutive model for red sandstone were calibrated.Using these calibrated parameters,a finite-element model of the dynamic compression test on a large-diameter SHPB was established;verification was performed by comparing the numerical results with the experimental results in terms of both the failure pattern of the red sandstone and the corresponding stress-strain curves.The results show that:(1)under confining pressure,the propagation direction and extent of internal cracks are constrained,preventing rapid crack penetration,so that the peak stress increases with increasing hydrostatic pressure;(2)under different loading air pressures,red sandstone exhibits a pronounced strain-rate effect,with both dynamic compressive and splitting tensile strengths positively correlated with the average strain rate;(3)analysis of the dynamic increase factors for compressive strength(DIFc)and tensile strength(DIFl)indicates that the strain-rate effect on the dynamic tensile peak stress is more pronounced.The calibrated HJC constitutive parameters accurately reproduce the damage and fracture process of red sandstone under dynamic impact in LS-DYNA;prior to the maximum peak stress,the stress-strain curves obtained numerically are essentially consistent with the experimental curves.The calibrated parameters for this dense,high-strength red sandstone can serve as a reference for future studies on the dynamic mechanical properties of red sandstone and for its engineering applications.关键词
红砂岩/Holmquist-Johnson-Cook本构模型/LS-DYNA/分离式霍普金森压杆Key words
red sandstone/Holmquist-Johnson-Cook constitutive model/LS-DYNA/split Hopkinson pressure bar分类
数理科学引用本文复制引用
周永旺,汪维,刘洁宁,欧阳鑫,刘君..基于动静态力学试验下的红砂岩Holmquist-Johnson-Cook本构与数值模拟研究[J].爆炸与冲击,2026,46(8):103-116,14.基金项目
国家自然科学基金(11302261,11972201) （11302261,11972201）
江汉大学精细爆破全国重点实验室项目(PBSKL25A18) （PBSKL25A18）
