A Fatigue Damage Model for Life Prediction of Injection-Molded Short Glass Fiber-Reinforced Thermoplastic Composites

Short glass fiber-reinforced (SGFR) thermoplastics are used in many industries manufactured by injection molding which is the most common technique for polymeric parts production. Glass fibers are commonly used as the reinforced material with thermoplastics and injection molding. In this paper, a critical plane-based fatigue damage model is proposed for tension-tension or tension-compression fatigue life prediction of SGFR thermoplastics considering fiber orientation and mean stress effects. Temperature and frequency effects were also included by applying the proposed damage model into a general fatigue model. Model predictions are presented and discussed by comparing with the experimental data from the literature.

Automated summary

This paper proposes a critical plane-based fatigue damage model for predicting tension-tension or tension-compression fatigue life of short glass fiber-reinforced thermoplastics, considering fiber orientation and mean stress effects. The model also includes temperature and frequency effects, and comparisons are made with experimental data to validate and analyze the model predictions.