Comparison of load transfer index (U^*) with conventional stress analysis in vehicle structure design evaluation
by Khashayar Pejhan; Christine Q. Wu; Igor Telichev
International Journal of Vehicle Design (IJVD), Vol. 68, No. 4, 2015

Abstract: The load transfer index (U^*), is a relatively new concept compared to its counterpart of structural stress analysis. The U^*index characterises the internal stiffness distributions, which indicates the load transferring function of the prospective structure. Although the U^* index and stress values have been proven to be useful indices in design, a systematic comparison between the conventional stress analysis and the loads transfer analysis (based on U^*index) is lacking. In this study, using a component of the parcel rack from multiple passenger vehicles as an example, we demonstrate the unique capability of U^*, indicating the load transferring function. We further show how the combination of the load index U^* and the stress distributions provides a comprehensive understanding of the structure's response to various loading conditions. More importantly, we will discuss how the U^* can provide unique guidelines for structure design with the purpose of improving the load transfer capacity and reducing the weight.

Online publication date: Wed, 12-Aug-2015

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