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| Study on parameters of Holmquist-Johnson-Cook model for granite porphyry |
| Received:March 26, 2015 Revised:September 18, 2015 |
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| DOI：10.7511/jslx201605011 |
| KeyWord:rock numerical simulation HJC constitutive model experimental measurement sensitivity |
| Author | Institution |
| 闻磊 |
中南大学 资源与安全工程学院, 长沙 ;长沙矿山研究院有限责任公司, 长沙 ;金属矿山安全技术国家重点实验室, 长沙 |
| 李夕兵 |
中南大学 资源与安全工程学院, 长沙 |
| 吴秋红 |
中南大学 资源与安全工程学院, 长沙 |
| 苏伟 |
长沙矿山研究院有限责任公司, 长沙 ;金属矿山安全技术国家重点实验室, 长沙 |
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| 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 11%.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. |
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