Peak Load Response of a Concrete Beam in Mixed-Mode Fracture

摘要：

　　A major difficulty in simulating load response of a concrete structure in mixed-mode fracture lies in the fact that crack path is not known a priori.Predicting both the crack path and the associated load response involves advanced simulation techniques and novel numerical methodologies.Here,an intrinsic cohesive crack model is employed to study mixed-mode fracture in a concrete beam.The present approach requires neither preliminary results from linear elastic fracture mechanics simulations nor a re-meshing procedure or special implementation to prevent crack locking.Simulations with regular meshes illustrate that this concise approach can provide a reasonable estimation of peak load of the pre-cracked concrete beams in mixed-mode fracture.This study shows that the energy ratio in the bilinear softening law has larger effects than the stress ratio.

关键词： Peak load mixed-mode fracture cohesive crack model

作者: Xiang Guo Ray KL Su Ben Young

作者单位: School of Mechanical Engineering,Tianjin University,Tianjin 300072,China Department of Civil Engineering,The University of Hong Kong,Pokfulam Road,Hong Kong,China

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 272-275

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）