Yachuan Kuang, Guangwei Wang, Runan Tian, Chang He, Fan Fan, Weikang Li, Wei Pang
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A Fatigue Life Prediction Model of Stud Based on Damage Mechanics
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%.
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.
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