Development of Fatigue Life Model for Rubber Materials Based on Fracture Mechanics

Abstract

In this paper, the research on the fatigue damage mechanism of tire rubber materials is the core, from designing fatigue experimental methods and building a visual fatigue analysis and testing platform with variable temperature to fatigue experimental research and theoretical modeling. Finally, the fatigue life of tire rubber materials is accurately predicted by using numerical simulation technology, forming a relatively complete set of rubber fatigue evaluation means. The main research is as follows: (1) Mullins effect experiment and tensile speed experiment are carried out to explore the standard of the static tensile test, and the tensile speed of 50 mm/min is determined as the speed standard of plane tensile, and the appearance of 1 mm visible crack is regarded as the standard of fatigue failure. (2) The crack propagation experiments were carried out on rubber specimens, and the crack propagation equations under different conditions were constructed, and the relationship between temperature and tearing energy was found out from the perspective of functional relations and images, and the analytical relationship between fatigue life and temperature and tearing energy was established. Thomas model and thermo-mechanical coupling model were used to predict the life of plane tensile specimens at 50 °C, and the predicted results were 8.315 × 105 and 6.588 × 105, respectively, and the experimental results were 6.42 × 105, with errors of 29.5% and 2.6%, thus verifying the accuracy of thermo-mechanical coupling model.

Prediction of rubber fatigue life using an assimilation-based learning approach and incremental crack propagation model

“…They are utilized in the manufacturing of various products including tires [2], conveyor belts [3], isolators [4] and more. In these application contexts, rubber structural components commonly endure cyclic loads, resulting in fatigue failure as a primary form of material deterioration in rubber [5]. The fatigue performance of rubber materials significantly affects the service life of structural components.…”

Fatigue failure of incorporated crack HTPB(Hydroxyl-terminated polybutadiene) propellant under strain control

“…Nanoreinforcements in carbon fiber reinforced polymers (CFRP) have been shown to enhance mechanical properties considering quasi-static and fatigue loading, and CFRP is a promising option in terms of performance optimization. Xingwen Qin [26] focuses on investigating the fatigue damage mechanism of tire rubber materials through various research methods, including experimental design, visual analysis, theoretical modeling, and numerical simulation. The study successfully predicts the fatigue life of tire rubber materials using a comprehensive set of evaluation means, validating the accuracy of the thermo-mechanical coupling model in predicting fatigue life under different conditions.…”