双轴非比例低周疲劳载荷下船体裂纹板累积塑性数值分析  

Numerical analysis of accumulative plasticity of hull cracked plate subjected to biaxial non-proportional low-cycle fatigue loading

作　　者：杜波 邱圣临 邓军林 董大伟 卢瑞涛 侯睿涵 DU Bo;QIU Sheng-lin;DENG Jun-lin;DONG Da-wei;LU Rui-tao;HOU Rui-han(School of Mechanical and Marine Engineering,Beibu Gulf University,Qinzhou 535011,China)

机构地区：[1]北部湾大学机械与船舶海洋工程学院,广西钦州535011

出　　处：《舰船科学技术》2022年第10期43-48,共6页Ship Science and Technology

基　　金：国家自然科学基金资助项目(52161042,51809144);广西自然科学基金资助项目(2019GXNSFDA245035,2021GXNSFAA075003)。

摘　　要：仅对单轴载荷下的船体受力情况分析已经不能满足当下船舶工程中存在的问题,本文对双轴非比例低周疲劳载荷作用下考虑累积塑性破坏的船体裂纹板进行理论分析,数值分析,探究在不同相位差、应力比、双轴应力比下的累积塑性破坏与低周疲劳的相互作用关系,为双轴非比例低周疲劳裂纹扩展行为提供合理规律。The analysis of hull stress under uniaxial load can not satisfy the existing problems in the current marine engineering. Therefore, the biaxial non-proportional low-cycle fatigue loading considering accumulative plastic failure with hull crack plate under theory analysis in this paper. The effects of different phase difference, stress ratio and biaxial ratio on accumulative plastic damage was explored by numerical analysis. It provides a reasonable basis for accurate assessment the effect of accumulative plastic on the crack growth behavior of hull plates under non-proportional biaxial low-cycle fatigue.

关 键 词：船体裂纹板 双轴低周疲劳 非比例载荷 累积塑性 数值分析 

分 类 号：U672[交通运输工程—船舶及航道工程]