Effects of temperature and strain rate on the tensile behavior of short fiber reinforced polyamide‐6

Abstract

Tensile behavior of extruded short E-glass fiber reinforced polyamide-6 composite sheet has been determined at different temperatures (21.5"C, 50°C 75°C 100°C) and Merent strain rates (O.O5/min, 0.5/min, 5/min). Experimental results show that this composite is a strain rate and temperature dependent material. Both elastic modulus and tensile strength of the composite increased with strain rate and decreased with temperature. Experimental results also show that strain rate sensitivity and temperature sensitivity of this composite change at a temperature between 25°C and 50°C as a result of the glass transition of the polyamide-6 matrix. Based on the experimental stress-strain curves, a two-parameter strain rate and temperature dependent constitutive model has been established to describe the tensile behavior of short fiber reinforced polyamide-6 composite. The parameters in this model are a stress exponent n and a stress coefficient u*. It is shown that the stress exponent n, which controls the strain rate strengthening effect and the strain hardening effect of the composite, is not only strain rate independent but also temperature independent. The stress exponent u*, on the other hand, varies with both strain rate and temperature.

Investigation of mechanical impact behavior of short carbon-fiber-reinforced PEEK composites

“…The effect of strain rate and temperature on mechanical behavior of short fiber thermoplastic composites has been reported in the literature [13,25,26]. Wang et al [25] showed that short fiber thermoplastic composite is a strain rate and temperature dependent material.…”

“…Wang et al [25] showed that short fiber thermoplastic composite is a strain rate and temperature dependent material. Both the elastic 7 modulus and tensile strength of the composite increased with strain rate and decreased with temperature.…”

An invariant-based anisotropic material model for short fiber-reinforced thermoplastics: Coupled thermo-plastic formulation

“…In line with this, several investigations have characterized the thermal and geometric dependency of the material short glass fiber reinforced components under quasi-static [21,12,29], rate [46] and fatigue loading conditions [13] for different fiber orientation angles.…”

Characterization of unidirectional carbon fiber reinforced polyamide-6 thermoplastic composite under longitudinal compression loading at high strain rate

“…Similar results for the compressive [5] and tensile [5][6][7][8] behavior of the pure polymer under dynamic loading were investigated. Also the tensile strength of short and long glass fiber reinforced polyamide was found to increase with strain rate [7][8][9][10][11]. To the a Corresponding author: ploeckl@lcc.mw.tum.de knowledge of the authors only few attempts were carried out to characterize the dynamic stress-strain response of carbon fiber reinforced polyamide-6 composites.…”