摘要
船舶和海洋工程装备制造业是建设"海洋强国"的重要基石,船舶结构往大型化发展成为必然趋势。大型化船舶发展的过程中,船舶结构所承受的应力及变形越来越大,使得船舶结构的低周疲劳损伤问题十分突出。针对疲劳裂纹扩展的过载效应问题,运用断裂力学理论和弹塑性有限元建模方法,分析了过载后裂纹尖端应力场和位移场,探讨了施加单个拉伸过载作用后裂纹的扩展行为。
Our foreign trade has flourished in recent years, and its dependence on marine environment and resources has increased substantially. Developing marine economy and building a "maritime power" have become an inevitable choice for our economy to reach a new level. The trend of large-scale development of ships is inevitable. However, in the development process of large-scale ships, the stress and deformation of ship structures are so high and large, which makes the problem of low cycle fatigue damage of ship structure very prominent. In order to solve the problem of overload effect, the stress and displacement fields of crack tip were analyzed by using fracture mechanics and elastic-plastic finite element, and the crack propagation behavior after single tensile overload was discussed.
作者
徐庚
董琴
严仁军
陈威
Xu Geng;Dong Qin;Yan Renjun;Chen Wei(Department of Marine and Energy Power Engineering,Wuhan University of Technology,430063,Wuhan,China;Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics,Department of Mechanics and Engineering Structure,Wuhan University of Technology,430070,Wuhan,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2021年第5期2111-2116,共6页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金(51909198)
中央高校基本科研业务费专项资金资助(2019IVA105,2020IVA084,2020IVB030)。
关键词
裂纹扩展
过载
迟滞效应
应力应变场
crack propagation
overload
retardation effect
stress-strain field
