Compressive Strength Analysis of Capacitor Metal Shell

Aiming at the bulging deformation phenomenon during the operation of the capacitor, the finite element simulation software is used to analyze the compressive strength of the capacitor metal shell from two aspects of deformation and stress value. Considering the geometric nonlinearity and material nonlinearity of the structure, the response law of the shell under different internal pressures is explored. It is found that the deformation of the wide side of the capacitor shell is the most significant, and the deformation on the shell surface decreases from the middle area to the periphery. The stress near the area of corner angle of the shell is more concentrated. The simulation results are consistent with the deformation trend of the shell in the actual air charging test, which verifies the accuracy of the calculation model. This paper has practical guiding significance for the structural optimization design of capacitors.