The stress distribution in the joints of vehicles chassis frames subject to torsion

摘要

The problem of warping inhibition in the joints, of commercialvehicle chassis frames is very important for the estimation.of stress distribution in the joints and the overall torsionalstiffness of frames. The joints being the weakest parts inthe entire frame require that the stress levels should beestimated when designing a frame for required torsional stiffness.Plate theory has been applied to-analyse stress distributionsin the joints of a ladder frame-in torsion. The frame consistsof channel section cross members-welded to the web: of the sidemembers. The degree of cross member warping inhibition in thewelded joints has also been estimated analytically by usingthe concept of the strip beam theory. - The analytical values ofstresses have been compared with-photoelastic measurements onphotoelastic models of isolated joints and a complete ladderframe.