A large part of the weight of a truck is due to the chassie. Stronger and stronger demands are expressed for lighter vehicles in order to increase the pay load. Through this the specific fuel consumption is decreased, the amount of exhaust is lowered and the transport economy improved. To achieve a noticeable reduction in weight, parts of the chassie construction will be examined with the respect to the ability to reduce the weight. Components which are of interest in this respect are axles, anti-roll bars etc. These components are today made from forged or cast materials. One possibility to optimize the weight of the components is to fabricate the components from smaller parts in high strength materials and join them by welding. However, many of the materials used have limited weldability and their properties after welding are not very well known. Especially the fatigue properties are dimensioning for many components and these must be improved for welded joints.
The aim of this research project is to develop recommendations on welding in high strength steel with high carbon content, towards optimum properties. Design guidelines and data for fatigue design, to be used in product development of light weight structures, are expected output from the work. The results can be used for new design solutions of chassie components, aiming for a weight reduction of 20% compared to today's solution. Apart from the weight reduction other benefits will also be achieved as more efficient, more environmental friendly transport of components, better functionality and more effective use of the material.
Forskningsmiljö / Institution
Produktionsteknik Väst, PTV
Institutionen för ingenjörsvetenskap