两平行穿透裂纹合并过程仿真分析.pdfVIP

本文引用格式：刘灿铭，黄劼，秦钦 . 两平行穿透裂纹合并过程仿真分析 [J]. 新型工业化，2015，5（9）：31-37 DOI：10.3969/j.issn.2095-6649.2015.09.006 两平行穿透裂纹合并过程仿真分析 刘灿铭 1 ，黄劼 1 ，秦钦 2 （1.四川大学，四川成都610065；2.东南大学，江苏南京211189） 摘要：本文以断裂力学相关理论为算法基础，以修正后的Paris裂纹增长[1] 方式为前提，对两平行穿透裂纹合 并过程进行软件模拟仿真。软件采用基于MFC类库的C++语言开发，完成了不规则穿透裂纹的自动表征，断裂韧 度评定点的有效性判定，应力强度因子、载荷比以及断裂比的计算，实现了裂纹塑性区的划分，求出了两平行穿 透裂纹尖端塑性区发生接触时的临界间距，并通过断裂载荷比评定点，对两平行穿透裂纹的合并过程进行仿真分析， 最终为多裂纹失效机理的研究提供了手段。 关键词：穿透裂纹；合并过程；仿真；参数确定 Simulation Analysis of Two Parallel Penetrated Cracks for the Merging Process 1 1 2 LIU Can-ming , HUANG Jie , QIN Qin (1.Sichuan University, Sichuan Chengdu 610065, China;2.Southeast University, Jiangsu Nanjing 211189, China) ABSTRACT : In this work,a stimulation software which is on the basis of the algorithm of fracture mechanics and combined with the modified Paris crack growth mode is used to stimulate the merging process of the two parallel penetrated cracks. The stimulation software employs the C ++ language which is based on the MFC class library. It is very usefulin simulating automatic characterization of the irregular penetrated cracks. In addition, the software is also effective inevaluating the effectiveness of the fracture toughness assessment point and calculating of the stress intensity factor, load ratio and the fracture ratio. The simulation result provides the division of the plastic area and get the critical distance of the merging process at the tip of the two parallel penetrated cracks in the plastic area. According to the simulation result of the fracture toughness assessment point and the merging process of the two parallel penetrated cracks, the stimulation software can be a useful means to the studies on the failure mechanism of multiple cracks. KEyWORDS: Crack penetration; Merging process; Simulation; Parameter determiner Citation: LIU Can-ming, HUANG Jie, QIN Qin. Simulation An