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원지혜(Ji-hye Won),이상교(Sang-kyo Lee),이흥식(Heung-shik Lee),최은영(Eun-young Choi),조종두(Chongdu Cho),서형주(Hyoung-joo Seo),김성담(Seong-dam Kim),세오히로유키(Seo Hiroyuki),김영길(Young-gil Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In this study, wire, bundle and ass’y level of the wire harness system are investigated for the fatigue life prediction using both finite element method (FEM) and experimental analysis. To obtain stress-life (S-N) histories of the componential wires of the system, wires are prepared and applied repeated bending motion using developed fatigue life equipment. Equivalent model of the wire from rule of mixture theory is used for the simplification of the analysis. Contact conditions among the wires, taping conditions, optimized composition of wires, effects of the number of wires in the bundle are derived through the bundle level test and bundle numerical analysis. Wire and bundle level results are adopted for the ass’y level analysis. For the ass’y level analysis, real wire harness system including bundle and grommet is numerically modeled and applied contact condition between wire and grommet with real opening motion. As a result, we was able to shorten development time by developing the simulation methodology for wire harness reliability using the FEM in the early stages of wire harness development..