Bearing capability of seatelevation and failure mechanism

of the internal Febased powder metallurgy

 

 

 

LI Zhixin1, LI Feng2, JIANG Weiguang1, LV Xun1, REN Haibo2

 

(1.College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;

 

2.Ningbo Shuanglin Auto Parts Co., Ltd., Ningbo 315153, China)

 

 

Abstract: In order to obtain the ultimate bearing characteristics, failure behavior and safety manners, the explicit finite element analysis calculation and the physical experiment were introduced to implement on the car seat elevation. On the finite element modeling, especially the material stress exceeding the yield limit, the real stress and real strain were used to descript the plasticity of material constitutive model. The structural displacement, velocity and acceleration response curves were obtained and the saw tooth effect was distinctive gradually with loading history. The phase transition was tracked through the response behavior and the phase point was extracted from the response curve. The ultimate torque of bearing seat elevation was about 96N·m calculated through the phase point and loading history curve, which is in good agreement with the experiment. The seat elevation was lost failure and found that the structural damage location, accounting for the simulation and the physics experiment disassembled was very close. The results indicate that the method is validity to give an efficient guidance design and to assure the reliability of the seat elevation, which can give some evidence to estimate the maximum bearing moment and the failure behavior owning to the key components.

 

Key words: explicit finite element analysis; crack propagation; powder metallurgy; failure experiment