In the automotive industry lots of efforts are made to create chassis with more strength and less weight. The definition of strength of a part has to be separated into the elastic behavior of the part on the one hand and the start of plastic deformation of the part on the other hand. This presentation focuses on the plastic behavior. The only remark on the elastic effects of hydroforming is that a tubular hydroformed part is much stiffer than a similar geometry, spot welded out of 2 pressed parts with the same wall thickness.At this moment a lot of development is targeting for "stronger" materials which still have to be formed into a final product geometry. In relation to this Dual Phase steels and Carbon fiber parts are mentioned. Unfortunately the required processes to create the product aren't available in a way that the automotive industry requires it according automotive standards (APQP).
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