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。
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.
出处
《新型工业化》
2015年第9期31-37,共7页
The Journal of New Industrialization
基金
总装备部重点应用项目(总装司第661号)
关键词
穿透裂纹
合并过程
仿真
参数确定
Crack penetration
Merging process
Simulation
Parameter determiner
