摘要
文中对含有复杂V形倾斜角的薄板结构应力场进行了理论分析和数值研究.通过建立奇异强度因子as与缺口应力强度因子N-SIF的关系,获得无量纲的N-SIF,在此基础上建立一系列不同几何尺寸、张开角与倾斜角下的有限板宽的斜裂纹切口薄板模型,对切口的应力场进行简化与拟合.通过控制变量法得到奇异强度因子与无量纲N-SIF的关系曲线,拟合得到简易的V形倾斜角的薄板结构应力场和N-SIF评估公式.将拟合出的N-SIF简化计算公式和有限元计算结果与传统文献计算结果进行对比与误差分析.结果表明:拟合出的应力场公式精度较高,可实现复杂倾斜角下V形切口应力场的快速评估.
The stress field of thin plate structure with complex V-shaped inclination angle was theoretically analyzed and numerically studied.By establishing the relationship between singular intensity factor“as”and notch stress intensity factor(N-SIF),dimensionless N-SIF was obtained.On this basis,a series of thin plate models with limited plate width under different geometric dimensions,opening angles and inclination angles were established,and the stress field formula of the notch was simplified and fitted.The relationship curve between singular strength factor and dimensionless N-SIF was obtained by the control variable method,and the simple stress field and N-SIF evaluation formula of thin plate structure with V-shaped inclination angle were obtained by fitting.The fitted simplified calculation formula of N-SIF was compared with the results of finite element method and the results of traditional literature,and the error was analyzed.The results show that the fitted stress field formula has high accuracy,which can realize the rapid evaluation of the stress field of V-notch under complex inclination angle.
作者
谌伟
王宇强
梁贵明
徐双喜
邱屿
SHEN Wei;WANG Yuqiang;LIANG Guiming;XU Shuangxi;QIU Yu(Key Laboratory of High Performance Ship Technology,Ministry of Education,Wuhan University of Technology,Wuhan 430063,China;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2024年第3期448-452,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金(51609185)
武汉理工大学三亚科教创新园项目(2020KF0038)。
