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| CONSTITUTIVE MODEL OF ROCK UNDER ONE-DIMENSIONAL HIGH STRESS AND REPEATED IMPACT LOADING |
| WANG Chun，TANG Lizhong，CHENG Luping，DENG Lifan，JIAN Yinghua，JIANG Feng |
| (School of Resources and Safety Engineering，Central South University，Changsha，Hunan 410083，China) |
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Abstract The significance of study on constitutive model of rock under one-dimensional high stress and repeated impact loading was expounded. By the research methods of combination model，rock may be regarded as an elastic element and a cohesive element in series，then with a damage mass Da1 parallel，then with a damage mass Da2 in series，forming a rock combination mechanical model. Then，the constitutive model equation of rock under one-dimensional high stress and repeat impact loading was elucidated. The rock mechanical test of skarn and serpentine under one-dimensional high stress and repeated impact loading was designed. The test results show that before the peak stress，the trends of dynamic stress-strain curve is consistent，without pressure dense phase，only the elastic stage and nonlinear deformation stage. There are two phenomena after the peak stress，one is rebound phenomenon，and the other is not rebound. By comparison between the test results and the theoretical results，it is shown that there is a good coherence between theoretical stress-strain curves and experimental stress-strain curves.
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2015, Vol. 34 
