Research on Series K Criterion of Concrete Fracture Based on numerical simulation

摘要：

Finite element numerical simulation experiment is applicable to the research on macro-mechanical properties of materials. The ascend part of the load versus loading point displacement curves of a series concrete fracture destructive tests are obtained by simulating the loading process of this series tests. Based on the linear asymptotic superposition assumption, the critical effective crack length of the specimen at the time of unstable fracture is calculated by analyzing these curves. The effective fracture toughness considering the impact of fracture process zone is calculated by inserting the maximum load and the critical effective crack length into a formula developed from LEFM. In the end, the series of concrete fracture K criterion considering the influence of fracture process zone are established by analyzing the results of effective fracture toughness of the series test.

关键词： numerical simulation concrete fracture fracture process zone fracture toughness fracture criterion

作者: A. M. Deng D. Y. Xu X. D. Wang

作者单位: Department of Engineering Mechanics, Hohai University, Nanjing 210098, China

会议类型: 国际会议

会议名称: 第三届亚太国际工程中计算方法学术会议暨第五届全国工程中边界元、无网格等数值方法学术会议(ICOME2009)

会议地点: 南京

会议语种:英文

页码: 1-7

在线出版日期: 2009-10-18（万方平台首次上网日期，不代表论文的发表时间）