Fatigue Life Predition Of An Automobile Panel Die By FEA Simulation Methold

Automotive panel is the most important part of automotive products. Automotive panel accounts for more than70%of the entire automobile manufacturing costs.meanwhile the quality and cost of automotive panel are linked to the quality and service life of dies,so the manufacturing techniques of automotive panel dies has become a key part of the automotive development.In this paper, the finite element analysis of an automotive panel die was carried out.and the strain field and the stress field were obtained.On this basis.the fatigue life were gotten.This paper mainly research work are as follows:1、The three-dimension model is set up for the automotive panel die by the UG software.Then the FEM model is built by using pre-processing software HyperMesh11.0.2、The constructed FEM model is input into Ansys to simulate the force conditions,meanwhile we get the equivalent stress nephogram and the equivalent strain nephogram,which was used to analyse its strength and stiffness.3、The failure mode of automotive panel die has been simply studied.The main failure mode include fracture,wear and plastic deformation,and the die failure is a result of joint action of these forms.4、Based on the FEM calculations, the fatigue life of the automobile panel die was estimated.Simulation result shows that the requirements of design and utilization are satisfied.Meanwhile,the structure is improved at the bottom of the die,but the fatigue life changed little with the improvement.Finally,under the premise of guaranteeing the fatigue life,the lightweight optimization design is carried on.Through the simulation analysis above,an important reference value is provided for the design and manufacture of automotive panel die.The study of this project is valuable to engineering application.