1971-02-01

Truck Frame Analysis Study 710594

A method of truck frame analysis is proposed to include the effects of forces acting in three dimensions as well as the effects of variable cross sections, off shear-center loading, and joint flexibility. The interaction between the frame and other components of the vehicle is discussed and a method is proposed to include these effects in the static and dynamic stress analysis of the frame components.The dynamic effects on stresses are proposed to be included in experimentally determined dynamic stress factors defined in terms of dimensionless probability density functions for various frame components and on- and off-highway conditions.An experimental program is outlined for the evaluation of stiffness characteristics of the flexible joints, the upper bound of the horizontal force acting at the front axle, and the dynamic stress factors. General analysis of forces and deformations in the chassis due to drive-shaft impact and twisting of the vehicle is included in the Appendices.

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