Simulation of residual stress in laser welding of quartz flexible accelerometer

Parameter drift exists when quartz flexible accelerometer is in use, which will greatly influence navigation precision. FMMEA (Failure mode, mechanism and effects analysis) results show that one important mechanism of parameter drift is the presence of laser welding residual stress, and then slow release of the residual stress will lead to structural deformation, thus causing parameter drift. Therefore, study on laser welding residual stress is of great significance. This article gives an account of one numerical analytical method based on ANSYS to simulate residual stress in the laser welding region of quartz flexible accelerometer. Simulation results demonstrate the existence of welding residual stress and the welding residual stress distribution is calculated quantitatively, which lay the foundation for further study of parameter drift.