太原理工大学学报2024，Vol.55Issue(2)：356-364,9.DOI:10.16355/j.tyut.1007-9432.20230047
基于点蚀演化的Q235钢材强度退化行为研究
Analysis of Strength Degradation of Q235 Corroded Steel Based on Pitting Evolution
摘要
Abstract
[Proposes]To evaluate the strength degradation behavior of corroded steel with pitting evolution,an in-situ pitting evolution method is achieved by ABAQUS software combined with Python program according to pit statistics on steel matrix surfaces at different corrosion durations.Following this,the stochastic pitting evolution method for assessing the mechanical properties of corroded steel is pro-posed.[Methods]Then,on the premise of the consistent mass loss rates between the numerical model and the test,the accuracy and applicability of numerical results of corroded steel strength are analysed and verified.Also,a model of strength degradation created by corrosion pits is established.In addition,the degradation laws of yield and ultimate strengths of corroded Q235 steel under the joint influence of mass loss rate and corrosion depth are systematically investigated.Successively,the generalized equations for the evolution of yield and ultimate strengths of corroded steel with the mass loss rate and corrosion depth are proposed.[Findings]The results show that when the pit depth is known,the residual strength de-creases exponentially with the increase of mass loss rate.The yield strength and ultimate strength of steel under the influence of pitting corrosion can be calculated by mass loss rate and pit depth together.关键词
腐蚀钢材/点蚀演化/剩余强度/质量损失率/随机数值分析Key words
corroded steel/pitting evolution/residual strength/mass loss rate/stochastic numerical analysis分类
建筑与水利引用本文复制引用
傅本钊,林瑞宗,赵贇,郭琪,吴泽燕..基于点蚀演化的Q235钢材强度退化行为研究[J].太原理工大学学报,2024,55(2):356-364,9.基金项目
国家自然科学基金资助项目(52208192) （52208192）
山西省基础研究计划资助项目(202103021224047&2202103021224047) （202103021224047&2202103021224047）
