TY - JOUR
T1 - Tension-tension fatigue performances of a pultruded carbon fiber reinforced epoxy plate at elevated temperatures
AU - Wu, Pangang
AU - Xu, Longjun
AU - Luo, Jianlin
AU - Zhang, Xueyi
AU - Bian, Wenfeng
PY - 2019
Y1 - 2019
N2 - Fatigue performance of pultruded CFRP plate at elevated temperature is essential for the design process and applications in structure rehabilitation and reinforcement. Here, tension-tension fatigue performances of pultruded CFRP plate at room temperature (RT), 50°C and 83°C (Tg minus 30 °C) were investigated along with static tension properties. The static tensile strength at different temperature (fᵤᵗ), fatigue life, prediction formula, temperature curves, stiffness curves and fatigue failure mechanisms were comprehensively studied in tandem with microstructure. Results reveal, temperature increase and fatigue load lead to resin thermo-elasto-plastic softening and premature failure; the resultant fatigue life is significantly reduced when temperature is close to 83 °C; the fatigue life at RT, 50 °C and 83 °C exceeds 2 × 10ⶠcycles with 95% reliability under stress level of 49.95%fᵤᵗ, 49.03%fᵤᵗ, and 43.24%fᵤᵗ, respectively.
AB - Fatigue performance of pultruded CFRP plate at elevated temperature is essential for the design process and applications in structure rehabilitation and reinforcement. Here, tension-tension fatigue performances of pultruded CFRP plate at room temperature (RT), 50°C and 83°C (Tg minus 30 °C) were investigated along with static tension properties. The static tensile strength at different temperature (fᵤᵗ), fatigue life, prediction formula, temperature curves, stiffness curves and fatigue failure mechanisms were comprehensively studied in tandem with microstructure. Results reveal, temperature increase and fatigue load lead to resin thermo-elasto-plastic softening and premature failure; the resultant fatigue life is significantly reduced when temperature is close to 83 °C; the fatigue life at RT, 50 °C and 83 °C exceeds 2 × 10ⶠcycles with 95% reliability under stress level of 49.95%fᵤᵗ, 49.03%fᵤᵗ, and 43.24%fᵤᵗ, respectively.
KW - fatigue
KW - high temperatures
KW - microstructure
KW - pultrusion
UR - http://handle.westernsydney.edu.au:8081/1959.7/uws:51383
U2 - 10.1016/j.compstruct.2019.02.062
DO - 10.1016/j.compstruct.2019.02.062
M3 - Article
SN - 0263-8223
VL - 215
SP - 421
EP - 431
JO - Composite Structures
JF - Composite Structures
ER -