Lightweight Design For Automotive Parts Based On Finite Element Method

This paper first to Beijing some automobile manufacturing company is relying on, the thesis introduces the research status of lightweight. And mainly in combination with some problems of the domestic research, the research of our country present stage lightweight situation are introduced. Domestic usage for this kind of lightweight aluminium alloy material is far lower than the international level, by analyzing the use of aluminum alloy in the car can reach the effect of lightweight, put forward the article adopts the method of aluminium alloy instead of traditional steel material application in the pedals and battery box body stents, and through the analysis software is analyzed. This method can be popularized in other auto parts for, lightweight development has important significance to our country.First of all, we analyzed the pedals and the structure features of the storage battery box body stents using CATIA software to establish the geometric model of two parts. Will be imported into the geometric hypermesh software, division of grid, and additional material properties. Analysis the pedals and the working state of the battery box bracket, according to the actual situation to the two plus a selection of appropriate constraints and stress. This paper first has carried on the finite element analysis, to the foot pedal put forward four kinds of operating mode analysis method, this paper analyses the people here wear soft shoes, the foot imposed uniformly distributed load, stamped on the pedals central; People wear soft shoes, the foot applied uniformly distributed load, stamped on the right edge of the foot pedal; People wear soft shoes, the foot applied uniformly distributed load, stamped on the pedals central edge. People wear shoes, loading in the bulge, exert concentrated load force of the four conditions. According to the result of analysis, make use of aluminum alloy 5052 to replace the original steel Q235. By comparing the analysis results of two materials pedal aluminum alloy pedal is not only can completely satisfy the security requirements of each working condition of the pedals, also can significantly reduce part weight, economy is better. Put forward two conditions of battery box body stents analysis, analysis of the braking condition and turbulence conditions determine its the worst working condition, through the analysis of the results proposed by high die casting aluminum ZL111 optimization, to achieve good effects of weight reduction at the same time can guarantee its use in the worst condition.On the pedals and lightweight design of battery box body stents, pedal decreased from 11.399 kg weight is 3.896 kg, a drop of 63%, storage battery box body bracket from 16.02 kg weight is 16.02 kg, a drop of 65.5%. Lightweight effect is obvious, and through cost accounting cost can save about 1.35 million yuan a year. And this method can be applied to other bracket cover parts and many other parts of lightweight design.