The results show that the break of gear belongs to bending fatigue fracture,the main bolt fracture bears from the root of gear teeth nearby transmission shaft,and the teeth break was caused by the bias load of the gear,the process was accelerated because of .

Effects of Drawing Velocity on Grain Growth and Bending Fatigue of CuAlNi Shape Memory Alloy with Column Crystal in Heat Mould Continuous Casting;

Effect of Surface Defects on Bending Fatigue Behavior of High Strength Spring Steel;

Study on the designing method of bending fatigue in gears those bear loading on both sides;

Influence of dosages of ground granulated blast-furnace slag and fly ash on flexural fatigue performance of concrete;

Investigation flexural fatigue behavior of steel fiber reinforced concrete for pavement surface stratum under cyclic load;

The contact fatigue and bend fatigue property of four kinds of carburizing steels .

Several processes were screened out,and gear contact fatigue, bend fatigue and adhesion tests were conducted.

This paper analyses the reasons of vertical bending fatigue fracture of welding a model 7t driven rear axle assembly,and introduces how to reduce the stress concentration of rear axle assembly,enhence fatigue life of welding joints,stop the producing of fratigue fracture,enhence its fatigue life.