Prediction of the Delamination at the Steel and CFRP Interface of Hybrid Composite Part |
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| Authors: | Jun-Su Park Jae-Hong Kim Joon-Hong Park Dae-Cheol Ko |
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| Affiliation: | 1.Department of Nanomechatronics Engineering, Pusan National University, Busan 46241, Korea;2.ERC for Innovative Technology on Advanced Forming, Pusan National University, Busan 46241, Korea;3.Department of Mechanical Engineering, Dong-A University, Busan 49315, Korea; |
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| Abstract: | The purpose of this study was to predict the adhesive behavior of steel and carbon-fiber-reinforced plastic (CFRP) hybrid parts based on the cohesive zone model (CZM). In this study, the steel sheet and CFRP were joined by epoxy resin in the CFRP prepreg during the curing process, which could generate delamination at their interface because of the springback of steel or the thermal contraction of the CFRP. First, double cantilever beam (DCB) and end-notched flexure (ENF) tests were performed to obtain various adhesion properties such as the critical energy release rate of mode I, mode II (GI, GII), and critical stress (σmax). A finite element (FE) simulation was performed to predict delamination using CZM, which was also used to describe the interfacial behavior between the steel sheet and the CFRP. Finally, a U-shape drawing test was performed for the steel/CFRP hybrid parts, and these results were compared with analytical results. |
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| Keywords: | carbon-fiber-reinforced plastic (CFRP) steel/CFRP hybrid part prepreg compression molding (PCM) cohesive zone model (CZM) delamination |
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