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.
2022,44(10): 43-48 收稿日期：2022-03-01
DOI：10.3404/j.issn.1672-7649.2022.10.009
分类号：U672
基金项目：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)
作者简介：杜波(1979-)，男，讲师，研究方向为结构疲劳断裂
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