TY - JOUR
T1 - Temperature- and strain-rate-dependent tensile failure behavior of short-fiber-reinforced PEEK composites
AU - Tang, Zhongbin
AU - Chen, Chunyang
AU - Li, Aijia
AU - Deng, Yong
AU - Zhang, Chao
AU - Li, Yulong
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2023/2/1
Y1 - 2023/2/1
N2 - This work presents an experimental investigation of the tensile failure behaviors of polyetheretherketone (PEEK), short carbon, and glass-fiber-reinforced PEEK composites at -30–100 °C and various strain rates (10−3–103 s−1). Quasi-static and dynamic tensile tests are conducted, and fracture morphology is characterized by performing scanning electron microscopy to reveal the mechanical properties and failure mechanisms of PEEK and its composites at different temperatures and strain rates. The results indicate that the tensile strength is highly sensitive to temperature and strain rate. At −30 °C and 100 °C, the strain rate sensitivity of the failure strain of the two composites is significantly reduced. In addition, compared with that at 25 °C, the energy absorptivity of PEEK composites decreases at high or low temperatures. Moreover, the primary failure mechanisms of the PEEK composites are interfacial debonding and fiber pull-out at high temperatures and fiber fracture at low temperatures.
AB - This work presents an experimental investigation of the tensile failure behaviors of polyetheretherketone (PEEK), short carbon, and glass-fiber-reinforced PEEK composites at -30–100 °C and various strain rates (10−3–103 s−1). Quasi-static and dynamic tensile tests are conducted, and fracture morphology is characterized by performing scanning electron microscopy to reveal the mechanical properties and failure mechanisms of PEEK and its composites at different temperatures and strain rates. The results indicate that the tensile strength is highly sensitive to temperature and strain rate. At −30 °C and 100 °C, the strain rate sensitivity of the failure strain of the two composites is significantly reduced. In addition, compared with that at 25 °C, the energy absorptivity of PEEK composites decreases at high or low temperatures. Moreover, the primary failure mechanisms of the PEEK composites are interfacial debonding and fiber pull-out at high temperatures and fiber fracture at low temperatures.
KW - Damage mechanics
KW - Fracture
KW - Mechanical properties
KW - Polymer-matrix composites (PMCs)
KW - Temperature dependency
UR - http://www.scopus.com/inward/record.url?scp=85143377076&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2022.110455
DO - 10.1016/j.compositesb.2022.110455
M3 - 文章
AN - SCOPUS:85143377076
SN - 1359-8368
VL - 250
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
M1 - 110455
ER -