含裂纹结构拘束相关断裂韧性预测程序研究
A Study on Constraint-Related Fracture Toughness Prediction Program for Cracked Structures
DOI: 10.12677/mos.2024.134406, PDF,    国家自然科学基金支持
作者: 张应华, 杨 杰*：上海理工大学能源与动力工程学院，上海市动力工程多相流动与传热重点实验室，上海；刘 芳, 崔元元：上海理工大学机械工程学院，上海；王骁晓：华东理工大学承压系统与安全教育部重点实验室，上海
关键词: 拘束；断裂韧性；预测程序；Constraint； Fracture Toughness； Prediction Program
摘要: 基于统一拘束参数Ap及拘束相关断裂韧性确定方法，采用Matlab软件编写了包含Python脚本的拘束相关断裂韧性预测程序，并借助Matlab App Designer功能完成了对预测程序主界面的设计。预测程序包括3个模块：ODB&MAT模块，Auto Monitor模块和Manu Monitor模块，预测流程主要包括5个步骤。基于编写好的程序，以单边缺口弯曲(SENB)试样和紧凑拉伸(CT)试样为研究对象，对不同拘束下各试样拘束相关的断裂韧性进行了预测。预测结果显示：预测程序所得开动力曲线与文献中所得具有很好的一致性，对J积分和等值线所围区域面积捕捉正确，对拘束参数Ap的计算及对开动力曲线的绘制准确。通过预测程序所确定的拘束相关断裂韧性与文献中所确定的在10%误差带内，可以较好地对不同拘束下含裂纹结构的拘束相关断裂韧性进行预测。
Abstract: Based on the unified constraint parameter Ap and the determining method of the constraint-re- lated fracture toughness, a constraint-related fracture toughness prediction program with Python script was written in Matlab software, and the main interface of the prediction program was designed with the help of Matlab App Designer. The prediction program includes three modules: ODB&MAT module, Auto Monitor module and Manu Monitor module, and the prediction process mainly includes five steps. Based on the written program, the prediction of the constraint-related fracture toughness of each specimen under different constraints was carried out by taking the single edge notched bending (SENB) specimen and the compact tensile (CT) specimen as the objects. The results show that the driving force curves obtained by the prediction program are in good agreement with those obtained in the literature, the J-integral and the area of the region surrounded by the isolines are correctly captured, and the calculation of the constraint parameter Ap and the plotting of the driving force curves are accurate. The constraint-related fracture toughness determined by the prediction program is within the 10% error band of that determined in the literature, which can be used to predict the constraint-related fracture toughness of cracked structures under different constraints.
文章引用：张应华, 刘芳, 崔元元, 王骁晓, 杨杰. 含裂纹结构拘束相关断裂韧性预测程序研究[J]. 建模与仿真, 2024, 13(4): 4498-4506. https://doi.org/10.12677/mos.2024.134406

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