Affiliation:
1. National Innovation Center of High Speed Train Qingdao China
2. School of Mechanical Engineering Southeast University Nanjing China
3. Institut Polytechnique des Sciences Avancées Ivry‐sur‐Seine France
Abstract
AbstractWelded components are highly vulnerable to fatigue failures due to stress concentrations and material imperfections. This study develops an analytical framework that predicts both high‐cycle (HCF) and low‐cycle (LCF) fatigue lives of welded joints using a structural strain parameter. By employing a linear hardening model, the method effectively translates structural stress into structural strain, providing a reliable metric for assessing fatigue life, especially in LCF conditions. Validated against experimental data from 62 longitudinal gusset joints, the approach proves both reliable and practical. This simplified method facilitates easier fatigue assessments, encouraging its wider use and potential standardization in engineering, thus improving the predictability of welded structures' performance.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Natural Science Foundation of Jiangsu Province