为了提高舰船结构的强度，舰船壳体等位置往往采用Q460等高强度钢材，大量的测试和实际船舶碰撞事故表明，舰船高强度钢材结构的失效形式通常不是静强度下的破坏，而是疲劳载荷下的结构失效和断裂，因此舰船高强度钢材的断裂力学特性分析一直是热点研究。本文详细介绍钢材的断裂与弹性力学原理，建立舰船高强度钢材的疲劳载荷分布和S-N曲线，结合有限元仿真软件Ansys进行舰船高强度钢材的板材力学特性仿真。
In order to improve the strength of ship structure, high-strength steel such as Q460 is often used in ship shell and other positions. A large number of tests and actual ship collision accidents show that the failure form of ship high-strength steel structure is usually not the failure under static strength, but the structural failure and fracture under fatigue load. Therefore, fracture mechanics analysis of high strength ship steel has always been a hot topic. This paper introduces the fracture and elastic mechanics principle of steel in detail, establishes the fatigue load distribution and S-N curve of ship high strength steel, and simulates the mechanical characteristics of ship high strength steel plate with Ansys.
2023,45(11): 72-75 收稿日期：2023-01-14
DOI：10.3404/j.issn.1672-7619.2023.11.014
分类号：U617.58
作者简介：葛君超(1988-),女,硕士,讲师,研究方向为塑性变形和断裂及产品结构优化
参考文献：
[1] 张宇, 李大永, 唐伟琴. 高强钢电阻点焊TS试样疲劳寿命预测[J]. 机械强度, 2016, 38(5): 962–966
ZHANG Yu, LI Da-yong, TANG Wei-qin. Fatigue life prediction of TS specimen with high strength steel resistance spot welding[J]. Mechanical Strength, 2016, 38(5): 962–966
[2] 辛克贵, 郭佳, 何铭华. 高强钢的应力强度因子分析[J]. 清华大学学报(自然科学版), 2010, 50(12): 1901-1905.
XIN Ke-gui, GUO Jia, HE Ming-hua. Stress intensity factor of high strength steel Journal of Tsinghua University(Natural Science Edition), 2010, 50(12): 1901-1905.
[3] 褚武扬, 姚玉琴, 林实, 等. 高强钢螺桩应力腐蚀断裂研究[J]. 中国腐蚀与防护学报, 1982(1): 18–26+68-69
CHU Wu-yang, YAO Yu-qin, LIN Shi, et al. Study on stress corrosion fracture of high strength steel screw pile[J]. Journal of Chinese Society for Corrosion and Protection, 1982(1): 18–26+68-69
[4] 钟勇. 断裂力学在一些单位的应用情况介绍[J]. 冶金建筑, 1978(1): 70
ZHONG Yong. Introduction to the application of fracture mechanics in some units[J]. Metallurgical Construction, 1978(1): 70
