Abstract
In this paper, a comprehensive evaluation model of light-weighting scheme is established, which is based on three dimensions, including the life cycle costs of the resource consumed by the designed objects (LCC), willingness to pay for the environmental effect of resource consumption (WTP) and performance (P). Firstly, cost of each stage is determined. Then, based on the resource classification, which is based on cost elements, determine the material list needed, and apply WTP weight coefficient to monetize life cycle environmental impact and obtain the life cycle comprehensive cost of designed scheme (TCC). In the next step Performance (P) index is calculated to measure the value of the life cycle costs by applying AHP and SAW method, integrated (TCC) and (P) to achieve comprehensive evaluation of light-weighting scheme. Finally, the effectiveness of the evaluation model is verified by the example of car engine hood.
Highlights
On the background of sustainable development, automobile light-weighting has become a focus of academic research in the current society in which, resources and environment problems have become increasingly prominent
From the perspective of LCC, research on how to reduce the life cycle cost and environmental impact of automotive products, and improve the product life cycle performance, so as to guide the selection of lightweighting designation program is of great significance
Domestic literature Lv Yining, Lv Zhenhua [4], by setting the thin wall plate structure rigidity for objective, proposed that body sheet bending strain energy and membrane strain energy can be considered as performance evaluation, so as to guide the lightweighting scheme evaluation and selection, but they did not consider the cost and environmental impact of each scheme
Summary
On the background of sustainable development, automobile light-weighting has become a focus of academic research in the current society in which, resources and environment problems have become increasingly prominent. [2] analyzed the life cycle costs and environmental impact of 6 different materials used for replacing car boot partition, based on the theory of LCC and LCA, to obtain the comprehensive evaluation value. Though scanning domestic and foreign literature, it is not difficult to find that foreign literature focuses on the life cycle assessment of light-weighting materials, domestic literatures focus on light-weighting designation method research, few are based on LCC perspective for comprehensive quantitative evaluation of light-weighting design. Taking this as the breakthrough point, this paper builds a comprehensive evaluation model of light-weighting program from three dimensions.
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