Conceptual Design of Microcellular Plastics Bumper Parts Using Axiomatic Approach

Abstract

Society is increasingly demanding automobiles centered on environmental factors and fuel efficiency. Accordingly many studies have examined the use of Al, Mg and composites for lightweight automobiles. We implemented a microcellular plastic (MCP) designed for a lightweight automobile using axiomatic design. The results show that the physical properties of MCPs are most affected by the size and uniformity of the MCPs, and that a weight reduction of about 15% is possible by applying MCPs to bumper covers. In conclusion, the MCP bumper design was proved to be a decoupled design, demonstrating the applicability of MCPs to bumpers.

A Study on Optimizing the Mechanical Properties of Glass Fiber-Reinforced Polypropylene for Automotive Parts

“…For the purpose of optimization, priority was set among the characteristics using axiomatic design so that certain characteristics were selected to be preferentially achieved over the others. Thus, this technique was able to be used to optimize the multiple characteristics of the PP þ G=F parts [16,17] .…”

Development of a Thermoplastic Olefin Blend Embo-Pattern Sheet Cross-linked by Electron Beam Irradiation for Luxurious Automotive Interior Parts

“…The design matrix in equation (1) exhibits a decoupled design that satisfies the independence axiom of axiomatic design [20,21] . This indicates that the optimization of the soft segment should precede that of the hard segment to identify the optimal materials mixture for TPO blend sheets cross-linked by electron beam irradiation.…”

“…Although the axiomatic design is applied to product and process design, this study adopted its basic concepts as a method to set priorities in the materials mixture test [20,21] . The functional requirements and design parameters used with the axiomatic design application included the following: FR 1 , calendaring characteristics; DP 1 , soft segment mixture ratio; FR 2 , characteristics of cross-linking by electron beam irradiation, and DP 2 , the hard segment mixture ratio.…”

Development of a Multilayered Optical Diffusion Sheet Using Microcellular Foaming Technology

“…Uncoupled designs and decoupled designs meet the independence axiom, and thus are valid designs. The correlation between the FRs and DPs is used in product design, while the correlation between the DPs and process variables (PVs) is used for process design [13,[17][18][19] .…”

“…Microcellular foaming technology is being applied in various fields (e.g., electrical, automotive and tissue engineering) worldwide [4][5][6][7][8][9][10][11] . It offers advantages in cost reduction, weight reduction, and dimensional stability while maintaining the original properties of a product [11][12][13] . Microcellular foaming batch processes currently have a productivity limit, unlike continuous processes, e.g., injection molding and extrusion molding.…”