[1]徐善华,张海江,张辙洵,等.静载作用下含中心裂纹锈蚀钢板断裂性能退化机理与退化规律[J].东南大学学报(自然科学版),2020,50(5):808-813.[doi:10.3969/j.issn.1001-0505.2020.05.003]
　Xu Shanhua,Zhang Haijiang,Zhang Zhexun,et al.Fracture property degradation mechanism and degradation law of corroded steel plates with central cracks under static tension load[J].Journal of Southeast University (Natural Science Edition),2020,50(5):808-813.[doi:10.3969/j.issn.1001-0505.2020.05.003]
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静载作用下含中心裂纹锈蚀钢板断裂性能退化机理与退化规律()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
50
期数:
2020年第5期
页码:
808-813
栏目:
材料科学与工程
出版日期:
2020-09-20

文章信息/Info

Title:
Fracture property degradation mechanism and degradation law of corroded steel plates with central cracks under static tension load
作者:
徐善华; 张海江; 张辙洵; 温雅鑫
西安建筑科技大学土木工程学院, 西安 710000
Author(s):
Xu Shanhua;  Zhang Haijiang;  Zhang Zhexun;  Wen Yaxin
School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710000, China
关键词:
锈蚀钢材;  断裂力学;  断裂性能退化;  残余名义断裂韧度;  退化规律
Keywords:
corroded steel;  fracture mechanics;  fracture property degradation;  residual nominal fracture toughness;  degradation law
分类号:
TU511.3
DOI:
10.3969/j.issn.1001-0505.2020.05.003
摘要:
以带中心裂纹的锈蚀钢板为研究对象,运用断裂力学的理论和参量,对锈蚀钢板断裂性能的退化机理与退化规律进行研究,建立了锈蚀钢材残余断裂韧度退化的经验模型.结果表明,锈蚀会导致应力强度因子的幅值增加,增大裂纹尖端应力场和位移场的强度,加速既有裂纹的扩展.对于未锈蚀模型和均匀锈蚀模型,裂纹尖端应力强度因子在厚度方向上从模型内部到模型表面逐渐减小;对于点蚀模型,裂纹尖端应力强度因子在厚度方向上从模型内部到表面锈坑底部逐渐增大.锈蚀还会影响J积分-荷载曲线,使J积分值更快达到其临界值,导致钢板断裂提前发生.断裂韧度退化的经验模型结果与断裂试验结果较为符合.
Abstract:
The corroded steel plates with central cracks were prepared to investigate the fracture property degradation mechanism and degradation law of corroded steel plates using the theory and parameters of fracture mechanics. An empirical model for nominal fracture toughness degradation of corroded steel was established. The results show that corrosion can increase the amplitude of the stress intensity factor(SIF), the intensity of the crack tip field and the displacement field, thus accelerating the propagation of existing cracks. For the non-corrosion model and the general-corrosion model, the SIF value at the crack tip decreases gradually from the model interior to the external surface in the thickness direction. For the pitting-corrosion model, the SIF value at the crack tip increases gradually from the model interior to the pit bottom in the thickness direction. Corrosion makes the J-load curves reach the critical value faster, thus leading to the premature fracture of steel plates earlier. The results of the empirical model of fracture toughness degradation agrees well with those of the fracture tests.

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备注/Memo

备注/Memo:
收稿日期: 2020-02-17.
作者简介: 徐善华(1963—),男,博士,教授,博士生导师,xushanhua@163.com.
基金项目: 国家自然科学基金资助项目(51678477)、陕西省教育厅重点实验室科学研究计划资助项目(17JS061).
引用本文: 徐善华,张海江,张辙洵,等.静载作用下含中心裂纹锈蚀钢板断裂性能退化机理与退化规律[J].东南大学学报(自然科学版),2020,50(5):808-813. DOI:10.3969/j.issn.1001-0505.2020.05.003.
更新日期/Last Update: 2020-09-20