摘要
薄壁方形截面管广泛应用于建筑、机械、石油化工等领域,随着使用年限的增加和人为因素的影响,薄壁管会产生裂纹。应力强度因子作为一个断裂参量,在工程构件断裂分析过程中起着重要的作用。在以往的研究中,几乎所有关于同一个裂纹截面含多个不同奇异应力场的情形都被回避。以弯曲载荷作用下薄壁方形截面管周期角裂纹问题为例,利用初等力学和守恒律的概念,通过找出不同应力强度因子之间的简单关系,提出了一种简便的求解同一截面上不同应力强度因子的方法。同时也给出了有限元数值解与本文解的比较,两者吻合较好。
Thin-walled square-section tubes are widely used in construction, machinery, petrochemical and other fields. With the increase of service life and human factors, thin-walled tubes will crack. As a fracture parameter, the stress intensity factor plays an important role in the fracture analysis of engineering components. In previous studies, almost all cases that the same crack section contained multiple different singular stress fields were avoided. In this paper, taking the periodic angle crack of thin-walled square-section tube under bending load as an example, using the concept of elementary mechanics and conservation law, a simple relationship between different stress intensity factors was proposed to solve a simple cross section. At the same time, the comparison between the finite element numerical solution and the solution was carried out, and the results from present method were accordant with those from finite element method.
作者
李龙
袁浩
谢禹钧
LI Long;YUAN Hao;XIE Yu-jun(College of Mining Engineering,Liaoning Shihua University,Liaoning Fushun 113001,China;College of Architecture&Storage Engineering,China University of Petroleum(East China),Shandong Qingdao 266555,China)
出处
《当代化工》
CAS
2020年第5期903-906,934,共5页
Contemporary Chemical Industry
基金
国家自然科学基金项目(50771052,50971068,11272141)资助
关键词
薄壁方形截面管
应力强度因子
裂纹
守恒律
有限元
Thin-walled square section tube
Stress intensity factor
Crack
Conservation law
Finite element
