A Fatigue Life Prediction Model of Stud Based on Damage Mechanics

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2025-03-25 DOI:10.1111/ffe.14629

Yachuan Kuang, Guangwei Wang, Runan Tian, Chang He, Fan Fan, Weikang Li, Wei Pang

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Abstract

This study investigates the fatigue life of studs in steel-concrete composite beams through an analysis of their fatigue damage mechanism based on damage mechanics theory. A fatigue life prediction model based on damage mechanics is derived, incorporating the service conditions of studs and the influence of fatigue stress ratio. Seventy-two sets of stud fatigue test data from domestic and international sources were collected. MATLAB software was utilized to fit the relevant parameters of the fatigue life prediction model. The proposed prediction model was verified using another 20 sets of fatigue test data and compared with the typical models. The results indicate that the proposed damage mechanics-based model exhibits high accuracy and stable predictions across varying fatigue stress amplitudes. Furthermore, the fatigue stress ratio significantly affects the fatigue life of studs. An increase in the fatigue stress ratio from 0.3 to 0.7 reduces the fatigue life of studs by approximately 50%.

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基于损伤力学的螺栓疲劳寿命预测模型

基于损伤力学理论，对钢-混凝土组合梁柱钉的疲劳损伤机理进行了分析，研究了柱钉的疲劳寿命。考虑螺栓的使用条件和疲劳应力比的影响，建立了基于损伤力学的螺栓疲劳寿命预测模型。收集了国内外72套螺柱疲劳试验数据。利用MATLAB软件对疲劳寿命预测模型的相关参数进行拟合。利用另外20组疲劳试验数据对该预测模型进行了验证，并与典型模型进行了比较。结果表明，基于损伤力学的模型在不同的疲劳应力幅值下具有较高的预测精度和稳定性。疲劳应力比对螺柱的疲劳寿命有显著影响。疲劳应力比从0.3增加到0.7，使螺柱的疲劳寿命减少约50%。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.