计算力学学报2016，Vol.33Issue(5)：725-731,7.DOI:10.7511/jslx201605011
花岗斑岩Holmquist-Johnson-Cook本构模型参数研究
Study on parameters of Holmquist-Johnson-Cook model for granite porphyry
摘要
Abstract
Quality,elasticity modulus,poisson ratio,uniaxial compressive strength,and tensile strength of granite porphyry from Yulong copper mine were obtained utilizing the relevant experiments.Typical dynamic stress-strain curves were obtained by SHPB test.Using relevant experimental results and finite element software LS-DYNA,HJC model parameters were got.On the basis of parameter sensitivity analysis,the method for taking values of HJC parameters was obtained.There are four parameters (A, B,N,fc )are sensitive.When the four parameters change between -30% and 30%,change rate of strength is greater than 1 1%.By combined with the experimental data and numerical simulation,reliable parameters can be obtained.This method can reflect HJC model based theory and balance workload of experiment and numerical simulation.This study is helpful for numerical simulation of rock dynamics.关键词
岩石/数值模拟/HJC本构模型/实验测定/敏感性Key words
rock/numerical simulation/HJC constitutive model/experimental measurement/sensitivity分类
数理科学引用本文复制引用
闻磊,李夕兵,吴秋红,苏伟..花岗斑岩Holmquist-Johnson-Cook本构模型参数研究[J].计算力学学报,2016,33(5):725-731,7.基金项目
国家自然科学基金(41272304,11472311)资助项目 （41272304,11472311）
