The structural strain method for fatigue evaluation of welded components: closed-form solutions

结构工程 焊接 材料科学 有限元法 结构材料 平面应力 可塑性 压力(语言学) 航程(航空) 拉伤 应力-应变曲线 变形(气象学) 复合材料 工程类 医学 语言学 哲学 内科学
作者
Zhigang Wei,Pingsha Dong,Xianjun Pei
出处
期刊:International Journal of Fatigue [Elsevier BV]
卷期号:180: 108119-108119 被引量:4
标识
DOI:10.1016/j.ijfatigue.2023.108119
摘要

A consistent and unified analysis framework is proposed in this paper for extending the early traction-based structural stress method to low-cycle fatigue regimes in fatigue evaluation of welded structures through a novel structural strain method. Instead of local strain or notch strain, the structural strain here refers to a through-thickness strain distribution that satisfies plane-remains-plan conditions under elastic-plastic deformation conditions. This paper provides closed-form solutions to structural strain distributions corresponding to loading and unloading, structural strain range, an equivalent structural strain range, and the structural stress-strain relation by considering elastic-perfectly plastic material behavior. Both finite element method (FEA) simulations and in-house modeling tools confirm the accuracy of these closed-form analytical solutions. Although these solutions are derived based on elastic-perfectly plastic material assumption, the resulting structural strain range, as a unique fatigue damage parameter for welded components, is shown essentially the same as those obtained numerically by considering a modified Ramberg-Osgood material model under pulsating loading condition, i.e., stress ratio equals zero. Good data correlation between the equivalent structural strain range predicted results and the test results obtained for a welded steel structure under the same loading condition is achieved. Finally, the structural strain range-based parameter is proven effective in correlating a large number of both low-cycle and high-cycle fatigue test data of welded structures made of several structural materials into a narrow scatter band demonstrating the universality of the structural strain method.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
每天都在找完成签到,获得积分10
1秒前
1秒前
2秒前
淡烟流水发布了新的文献求助10
3秒前
3秒前
小李发布了新的文献求助30
4秒前
汉堡包应助明芬采纳,获得30
4秒前
爆米花应助彭栋采纳,获得10
4秒前
5秒前
5秒前
MeiyanZou完成签到 ,获得积分10
5秒前
8秒前
8秒前
潇湘雪月发布了新的文献求助10
9秒前
9秒前
9秒前
10秒前
感动黄豆发布了新的文献求助10
10秒前
hhhblabla应助东方红采纳,获得10
12秒前
Poker应助sb采纳,获得10
13秒前
Ginger发布了新的文献求助10
13秒前
吃骨头的猫完成签到,获得积分10
13秒前
小李完成签到,获得积分10
13秒前
13秒前
14秒前
明芬发布了新的文献求助30
16秒前
16秒前
Smile完成签到,获得积分10
16秒前
Chaoe完成签到,获得积分10
19秒前
建国发布了新的文献求助10
20秒前
闪闪w发布了新的文献求助10
23秒前
淡烟流水完成签到,获得积分10
23秒前
俏皮芷蕊完成签到,获得积分10
24秒前
完美世界应助忐忑的阑香采纳,获得10
24秒前
华仔应助兴奋千兰采纳,获得10
29秒前
Ginger完成签到,获得积分10
30秒前
潇湘雪月发布了新的文献求助10
33秒前
科研通AI5应助科研通管家采纳,获得10
35秒前
35秒前
佳琳有乐完成签到,获得积分10
35秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989115
求助须知:如何正确求助?哪些是违规求助? 3531367
关于积分的说明 11253688
捐赠科研通 3269986
什么是DOI,文献DOI怎么找? 1804868
邀请新用户注册赠送积分活动 882078
科研通“疑难数据库(出版商)”最低求助积分说明 809105