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http://ir.ncue.edu.tw/ir/handle/987654321/17962

题名:  Study of Nonlinear Behaviors of Geological Materials 
作者:  Huang, TsunHui;Yang, ShyueCheng;Shieh, ChiouFen 
贡献者:  車輛科技研究所 
关键词:  Nonlinear;Soliton;Stressstrain 
日期:  201305

上传时间:  20140115T04:19:44Z

出版者:  Saudi Society for Geosciences 
摘要:  Two polynomial constitutive equations of nonlinear stressstrain relationship were used to construct two nonlinear 1D wave equations with external pressure (source term) applied. Nonlinear model 1 was a concave downward curve, and nonlinear model 2 was a concave upward curve. The timedependent stress and strain of a 300m length were calculated. The computation for nonlinear model 1 terminated at time t = 5. 0 s. The evaluated stress versus position at different times was mainly at position x = 0 m. The stress versus position had a concave point at position x = 0. 3 m. Between x = 0 m and x = 0. 3 m, the graph of stress versus position showed a small convex upward curve. Moreover, at the two sides of x = 0. 3 m, the strain position had distinctively different slopes. The distinctive difference in the slope of strain at position x = 0. 3 m can therefore be used to estimate the rupture position of a rock. The terminal evaluation time for nonlinear model 2 was at t = 1. 55 s. The stress versus position and the strain versus position to time change were within the 03 m interval from the pressure end. Time increase produced the phenomenon of stress and strain solitons. These stress and strain solitons moved forward and increased in peak value with time. During the compression process, the stress and strain soliton resulted in instability which rendered the rock situation more easily broken. The position of the rock rupture might have occurred away from the pressure side. 
關聯:  Arabian Journal of Geosciences, 6(5): 16131620 
显示于类别:  [車輛科技研究所] 期刊論文

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