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不同围压作用下非均匀岩石水压致裂过程的数值模拟 总被引:2,自引:0,他引:2
从岩石细观非均匀性的特点出发,提出一个描述非均匀材料渗流和破裂相互作用的数值模型。在这个数值模型中,单元的力学、水力学性质根据统计分布而变化,以体现材料的随机不均质性,材料在开裂破坏过程中流体压力传递通过单元渗流,损伤耦合迭代来实现。算例表明,该模型能较好地模拟出岩石类材料在水力压裂作用下,微结构非均匀分布和不同围压比对破裂模式、失稳压力的影响,非均匀性导致试件的开裂压力、失稳压力明显不同,裂纹扩展路径不规则发展,模拟结果和实验结果较为一致。 相似文献
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Spline finite strip has been successfully applied in solving right plates and shells by Cheung et al in 1982. In this paper, the method is extended to the analysis of parallelogram plate. This extension still retains the banded nature of the spline finite strip and only small amount of extra computing effort is required. Further-more, the discretisation error of the above method is established theoretically as a general case for the spline finite strip method. 相似文献
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Spline finite strip has been successfully applied in solving right plates and shells by Cheung et al in 1982. In this paper, the method is extended to the analysis of parallelogram plate. This extension still retains the banded nature of the spline finite strip and only small amount of extra computing effort is required. Furthermore, the discretisation error of the above method is established theoretically as a general case for the spline finite strip method. 相似文献
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IntroductionTherearetwoclassesofsolutionsforseepageproblemswithfreesurfaces ,i.e .,theadaptivemeshmethodsandthefixedmeshmethods.Theadaptivemeshmethodsinvolvetoolargeamountofcomputationforinhomogeneoussoilsandoftenleadtodivergentcalculations,andhence,arenowbeingsupercededbythefixedmeshmethods.Thefixedmeshmethodsfallintotwocategories,theintuitivemethodsandthevariationalinequalitymethods.Theintuitivemethods[1- 3]establishusuallytheiterativeproceduresbaseduponthefactthatthereisnodischargebetweenth… 相似文献