Abstract
Carbon fiber-reinforced polymer (CFRP) has the advantages of a high strength-weight ratio and excellent fatigue resistance and has been widely used in aerospace, automotive, civil infrastructure, and other fields. The properties of CFRP materials under high temperatures are a key design issue. This paper presents the quasi-static tensile mechanical properties of unidirectional CFRP plates at temperatures ranging from 20 to 600 °C experimentally. The laser displacement transducer was adopted to capture the in situ displacement of the tested specimen. The results showed that the tensile strength of the CFRP specimen was affected by the high-temperature effect significantly, which dropped 68% and 16% for the 200 and 600 °C, respectively, compared with that of the room temperature. The degradation measured by the laser transducer system was more intensive compared with previous studies. The elastic modulus decreased to about 29% of the room temperature value at 200 °C. With the evaporation of the resin, the failure modes of the CFRP experienced brittle fracture to pullout of the fiber tow. The study provides accurate tensile performance of the CFRP plate under high-temperature exposure, which is helpful for the engineering application.
Highlights
Carbon fiber-reinforced polymer (CFRP) has the advantages of high strength, light weight, and excellent fatigue resistance and has been widely used in aerospace, automotive, civil infrastructure, and other fields [1,2,3]
Conducted a tensile test on carbon fibers and CFRP laminate under a high temperature of 250–700 ◦ C, and the results indicated that the tensile strength and modulus of carbon fiber were reduced by nearly 50% following exposure to temperatures over the range of
The mechanical properties of the CFRP laminate were tested at 22 ◦ C, 300 ◦ C, 400 ◦ C, 500 ◦ C, and 600 ◦ C
Summary
Carbon fiber-reinforced polymer (CFRP) has the advantages of high strength, light weight, and excellent fatigue resistance and has been widely used in aerospace, automotive, civil infrastructure, and other fields [1,2,3]. Ashrafi et al [10] investigated the high-temperature effect on the mechanical properties of spiral-wound CFRP reinforcement and two different resin channel CFRPs. The results showed that the strength of the CFRP decreased to 50% of its initial value in the temperature range of 330 to 450 ◦ C. Based on the high-temperature mechanical properties of laminates and their components, researchers conducted comprehensive studies on the composite sandwich plate exposure to a high-temperature environment [16,17,18,19]. These experimental tests were conducted on a universal test machine, and the data were recorded by the displacement transducer on the machines. Combining with the in situ strain recorded by the laser transducer, the failure modes and associated mechanisms of the CFRP laminate were discussed
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