Abstract
Carbon fiber-reinforced plastic (CFRP) is a promising material to achieve lightweight automotive components. The effects of the strain rate and configurations of CFRP on dynamic tensile properties have not yet been fully explored; thus, its lightweight benefits cannot be maximized. In this paper, the dynamic tensile properties of CFRPs, tested using two different processes with two different resins and four different configurations, were studied with a strain rate from 0.001 to 500 s−1. The tensile strength, modulus, failure strain, and fracture mechanism were analyzed. It was found that the dynamic performance enhances the strength and modulus, whereas it decreases the failure strain. The two processes demonstrated the same level of tensile strength but via different fracture mechanisms. Fiber orientation also significantly affects the fracture mode of CFRP. Resins and configurations both have an influence on strain rate sensitivity. An analytic model was proposed to examine the strain rate sensitivity of CFRPs with different processes and configurations. The proposed model agreed well with the experimental data, and it can be used in simulations to maximize the lightweight properties of CFRP.
Highlights
Lightweight materials are important to achieve vehicle energy conservation and a reduction in carbon dioxide emissions
Gilat et al [11] compared the tensile properties of Carbon fiber-reinforced plastic (CFRP) in different configurations in a strain rate range of 10−5 to 600 s−1; a higher modulus was observed for all configurations with increasing strain rate, whereas the tensile strength of (90)s and [10]s barely increased
This study focused on the dynamic tensile properties to reveal the effect of strain rate and fracture mechanism
Summary
Lightweight materials are important to achieve vehicle energy conservation and a reduction in carbon dioxide emissions. Gilat et al [11] compared the tensile properties of CFRP in different configurations in a strain rate range of 10−5 to 600 s−1; a higher modulus was observed for all configurations with increasing strain rate, whereas the tensile strength of (90)s and [10]s barely increased. Wang et al [12] studied the dynamic properties of CFRP in the range of 10−5 to 104 s−1 for (45/−45)s and (0/45/90/−45)s configurations, and they found that the (45/−45)s configuration has a stronger strain rate sensitivity. The effect of stain rate on tensile properties, including strength, modulus, and failure strain, has not been completely established, in addition to the effect of CFRP configuration; quantitative studies are lacking
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