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

• Published in: Polymers Vol. 13; no. 14; p. 2250
• Main Authors: Amjadi, Mohammad, Fatemi, Ali
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 09.07.2021; MDPI
• Subjects: Automobile industry; Composite materials; Crack initiation; Damage assessment; damage mechanics; fatigue; Fatigue failure; Fatigue life; Fiber composites; Fiber orientation; Fiber reinforced polymers; Glass fiber reinforced plastics; High density polyethylenes; Injection molding; Interfacial bonding; Life prediction; Manufacturing; Mechanical properties; Moisture absorption; Polymers; short-fiber composites; Stress concentration; Tensile strength; Thermoplastic resins; thermoplastics
• ISSN: 2073-4360; 2073-4360
• DOI: 10.3390/polym13142250

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.