Tensile and fatigue behaviors of two thermoplastics including strain rate, temperature, and mean stress effects
Abstract
An experimental investigation was conducted to evaluate tensile and fatigue behaviors of two thermoplastics, a neat impact polypropylene and a mineral and elastomer reinforced polyolefin. Tensile tests were performed at various strain rates at room, -40°C, and 85°C temperatures with specimens cut parallel and perpendicular to the mold flow direction. Tensile properties were determined from these tests and mathematical relations were developed to represent tensile properties as a function of strain rate and temperature. For fatigue behavior, the effects considered include mold flow direction, mean stress, and temperature. Tension-compression as well as tension-tension load-controlled fatigue tests were performed at room temperature, -40°C and 85°C. The effect of mean stress was modeled using the Walker mean stress model and a simple model with a mean stress sensitivity factor. Copyright © 2014 SAE International.
Publication Title
SAE Technical Papers
Recommended Citation
Fatemi, A., Mellot, S., Khosrovaneh, A., & Buehler, C. (2014). Tensile and fatigue behaviors of two thermoplastics including strain rate, temperature, and mean stress effects. SAE Technical Papers, 1 https://doi.org/10.4271/2014-01-0901
