Comparison of load transfer index (U*) with conventional stress analysis in vehicle structure design evaluation. (2015)

• Record Type: Journal Article
• Authors: Pejhan, Khashayar; Wu, Christine Q.; Telichev, Igor
• Is Part Of: International journal of vehicle design. Volume 68:Number 4(2015)
• Page Start: 285
• Page End: 303
• Publication Date: 2015
• Subjects: load transfer index -- U& index -- load transfer analysis -- load path -- design evaluation -- stress analysis -- vehicle structure -- structural design -- vehicle design; Motor vehicles -- Design and construction -- Periodicals; 629.231
• Languages: English
• ISSNs: 0143-3369

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.