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Catastrophe model and its experimental verification of static loading rock system under impact load

ISSN号：1003-6326
期刊名称：《中国有色金属学报：英文版》
时间：0
分类：TU452[建筑科学—岩土工程;建筑科学—土工工程]
作者机构：[1]School of Resources ＆ Safety Engineering, Central South University, Changsha 410083, China, [2]Research Center for Numerical Tests on Material Failure, Dalian University, Dalian 116622, China, [3]School of Resources ＆ Civil Engineering, Northeastern University, Shenyang 110004, China
相关基金：Project（50490272,50490274,10472134） supported by the Natural Science Foundation of China; project（2005038250） supported by the China Postdoctoral Foundation

作者：左宇军[1,2,3], 李夕兵[1], 王卫华[1], 张义平[1], 马春德[1], 闫长斌[1]

关键词：岩石试验, 静载荷, 冲击负载, 稳定性, 突变模型, static loading rock system, impact load, instability, catastrophic model, coupled static-dynamic loading

中文摘要：

根据为装载结构的静电干扰弄弯的影响的大祸模型的意见，为装载一个静态的装载岩石系统的失败的影响的一个新大祸模型被建立，并且一个尺寸(1D ) 大祸模型被分析。分析结果显示大祸可以发生的分叉收集是不仅由机械系统本身决定了而且联系到外面的装载，它与分叉收集自己由系统的力学仅仅是坚定的并且与外面的装载没关系的在单音静电干扰的装载下面获得的结果不同。另外，相应 1D coupledstatic 动态的装载实验被设计验证大祸模型的分析结果。测试用完控制的 Instron 1342 电镀物品伺服测试系统，在媒介，种类率被单音升起引起动态负担。参数被获得把理论模型与实验相结合。批评动态负担对静态的负担的试验性、理论的曲线相当被与一致，因此，新模型被证明正确。

英文摘要：

According to the catastrophe model for impact buckling of static loading structures, a new catastrophe model for impact loading failure of a static loading rock system was established, and one dimension （1D） catastrophe model was analyzed. The analysis results indicate that the furcation collection where catastrophe may take place is not only decided by mechanical system itself but also relates to exterior loading, which is different from the results obtained under mono-static loading where the bifurcation collection is only determined by mechanics of the system itself and has nothing to do with exterior loading. In addition, the corresponding 1D coupled static-dynamic loading experiment is designed to verify the analysis results of catastrophe model. The test is done with Instron 1342 electroservo controlled testing system, in which medium strain rate is caused by monotony rising dynamic load. The parameters are obtained combining theoretical model with experiment. The experimental and theoretical curves of critical dynamic load vs static load are rather coincided, thus the new model is proved to be correct.