Fracture Behavior of Mild Steel Based on Numerical Algorithm

IF 1.1 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

International Journal of Steel Structures Pub Date : 2024-10-07 DOI:10.1007/s13296-024-00906-8

Jianguo Zhang, Jianxin Kou, Weiji Sun, Zhongwei Zhao

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引用次数: 0

Abstract

The fracture of randomly corroded steel members is one of the most key issues except the residual strength. Randomly corroded steel member fractures have historically been studied through experimentation. However, experimental results have often been limited in concluding the probabilistic distribution mode of ductility due to corrosion’s randomness. Thus, a corresponding numerical algorithm is necessary to predict the ductility of corroded steel members. The work is conducted based on this background. A numerical algorithm suitable for analyzing fractures is proposed. The reliability of the proposed algorithm is validated by comparison with experimental results and Ls-Dyna code. The influence of element size on ductility is revealed. The factors influencing accuracy of ductility of proposed algorithm are systematically investigated. The fracture of randomly corroded steel bars is analyzed. The results indicated that both E_size and f_s influence ductility. Adjusting the f_s can weaken the influence of E_size. The probabilistic distribution model of maximum strain corresponding to different levels of corrosion severity varies. The work in this paper can provide a novel way for fracture analysis of randomly corroded steel members.

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基于数值算法的低碳钢断裂行为研究

随机腐蚀钢构件的断裂是除残余强度外最关键的问题之一。钢构件随机腐蚀断裂历来都是通过试验来研究的。然而，由于腐蚀的随机性，实验结果往往局限于得出延性的概率分布模式。因此，需要相应的数值算法来预测腐蚀钢构件的延性。本研究就是在这样的背景下进行的。提出了一种适用于裂缝分析的数值算法。通过与实验结果和Ls-Dyna代码的比较，验证了该算法的可靠性。揭示了单元尺寸对塑性的影响。系统地研究了影响该算法延性精度的因素。对随机腐蚀钢筋的断裂进行了分析。结果表明，尺寸和尺寸对延性均有影响。调整fs可以减弱size的影响。不同腐蚀严重程度对应的最大应变概率分布模型是不同的。本文的工作为随机腐蚀钢构件断裂分析提供了一种新的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Steel Structures 工程技术-工程：土木

CiteScore

2.70

自引率

13.30%

发文量

122

审稿时长

12 months

期刊介绍： The International Journal of Steel Structures provides an international forum for a broad classification of technical papers in steel structural research and its applications. The journal aims to reach not only researchers, but also practicing engineers. Coverage encompasses such topics as stability, fatigue, non-linear behavior, dynamics, reliability, fire, design codes, computer-aided analysis and design, optimization, expert systems, connections, fabrications, maintenance, bridges, off-shore structures, jetties, stadiums, transmission towers, marine vessels, storage tanks, pressure vessels, aerospace, and pipelines and more.