Fatigue Life Analysis for Electronic Automatic Gearshift of Vehicles

Abstract

This paper is studied a type of electronic automatic gearshifts made of glass-fiber reinforced polypropylene. Finite element model was established in order to implement the nonlinear static strength analysis, which can determine the von Mises stress and the weak region of the gearshift. The strain test result confirmed the validity of the finite element analysis model. The relevant factors for mechanical performances of nonlinear material were determined through the static tensile test and fatigue loading test. Fatigue life analysis was conducted using the nominal stress method. It has been found that gearshift life satisfied design requirement. In addition, the methodology applied plays a significant role to the design theory of fatigue analysis for nonlinear material and gearshift life.