Stress Calculation of Fillet Rolled Crankshaft in Bending Fatigue Tests

Abstract

The stresses around the fillet of fillet rolled crankshaft section in bending fatigue test are quite complicated, which include the residual stresses induced by fillet rolling process and bending stresses caused by bending fatigue test loads. In this paper, the corresponding three dimensional finite element models of roller- shaft are created and the residual stresses near the fillet of crankshaft section are obtained by flexible-flexible contact computation. Then the transient analysis of bending fatigue test based on modal superposition method is carried out and the bending stresses are got. The results of stress can be used to the bending fatigue design of crankshafts.

Dynamic Investigation and Resonant Frequency Determination of Shaft Bending Fatigue Testing Machine

“…Similar to the machine structure in References [5,6,[10][11][12][13], a testing machine of shaft bending fatigue is designed and illustrated in Figure 1. A tested shaft is fixed at its two ends to two pendulum blocks (plates or tines), and each pendulum block is connected to the suspending system (including the frame, roller, and its bed) by flexible wireropes.…”

“…Kasprzyczak and Macha [9] introduced an electromechanical fatigue stand for polyharmonic bending and torsion, and its strain energy parameter control algorithm. Bao et al [10] calculated residual stress and bending stress of llet rolled crankshaft by the nite element method.…”