Abstract
The development of a carbon-fiber-reinforced plastic (CFRP) part is carried out by utilizing many experimental results in deciding the design. For this reason, the development period of a CFRP structure is long and an obstacle for commercialization. In this paper, multiple regression analysis is used to derive a response surface that estimates the generated load using the shape parameters of a corrugated collision energy absorbing structure to shorten the development period. To obtain the response surface, we conducted a quasistatic crushing experiment by using the length of linear portions (pitch) and the number of stacks (thickness) of a corrugated shape as parameters. When progressive crushing mode is observed, energy absorption efficiency decreases with the increase in pitch, and increases with the increase in the number of stacks. To discuss how energy absorption efficiency changes, a comparison examination is conducted using the derived response surfaces. Results indicate that specifications with high energy absorption efficiency can be accurately selected using the response surface of primary expression. In addition, differences in deformation mode were due to the influence of the stress at the corner portion of a part.
Highlights
IntroductionPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
In the transport sector, which accounts for approximately 14% of CO2 emissions, electrification and aerodynamic drag reduction and rolling resistance reduction have been promoted to meet the demand for reduced CO2 emissions from driving vehicles [1]
In a corrugated energy absorbing specimen that is formed with carbon-fiber-reinforced plastic (CFRP) to be subject to static compression, we examined a development method in which specifications are determined with a response surface
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. For weight reduction that considers collision safety performance, strengthening hightensile-strength steel, and the application of aluminum alloys and fiber-reinforced plastic (FRP) have attracted attention [4]. For metal materials, such as steel and aluminum alloy sheets, structures that use plastic deformation such as buckling and bending are generally used to increase collision energy absorption. FRPininautomotive automotivestrucstructend to assume frontal or rear-end collision and are related to cylindrical or hat-shaped tures turestend tendtotoassume assumefrontal frontalororrear-end rear-endcollision collisionand andare arerelated relatedtotocylindrical cylindricalororhathatparts parts [7] These studies havehave significantly deepened the the understanding about collision shaped [7]. Pole barrier setset position inin impact test online: https://one.nhtsa.gov/staticfiles/nvs/pdf/TP214P-01_APP_B_CHECKSHEETS.pdf
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