Impact Crash Analyses of an Off-road Utility Vehicle-Part I: Validation of Finite Element Model for Body Structure

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Impact Crash Analyses of an Off-road Utility Vehicle-Part I: Validation of Finite Element Model for Body Structure
出版類型SCI(Sciences Citation Index)
出版年度2012
AuthorsHu Huiwen, 胡惠文, Lu 呂瑋俊, & Lu 呂鎮源
開始頁153
頁數9
出版日期2012 / 2
其他編號?B-2037
中文摘要

A Taiwanese manufacturer of off-road utility vehicles (OUVs) was so much concerned with increased U.S. accidents and federal probes, involving OUVs from other manufacturers in the industry that it recently funded a thorough, analytical
crashworthiness evaluation of its production vehicle body structure. The approach is to employ a transient dynamic, largestrain, material nonlinear finite-element modelling and analysis using LS-DYNA, with adequate model validation. The current paper, Part I of the two parts, presents two sets of model validation via experimental modal analysis (EMA) and drop impact tests. The transfer of impact kinetic energy to vehicle structure’s internal energy results in extreme deformation,
and material nonlinearity/plasticity. Model validation is thus a must for accurate simulation. EMA was first conducted to obtain the natural frequencies and the associate mode shapes to validate the distributed stiffness and mass, both of which
can significantly influence the sequence of plastic deformation and energy transformation under impact. Secondly, drop impact tests are conducted on a part of body structure to obtain dynamic deformation to validate the strain-rate-dependent
coefficients of the material plasticity. Simulation and analysis of impact crashes, using the validated model, are presented in Part II of the paper.

期刊名稱International Journal of Crashworthiness
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