Environmental Vibration Testing and Environmental Stress Screening have been established as the most effective means of detecting mechanical production flaws. However, how to define proper Environmental Stress Screens is a typical difficulty to most industries as the vibration responses are different for various products. Although engineers without assistant tools can try t find relative better Environmental Stress Screens according to their experiences, it is difficult to approve that the applied stresses are appropriate and are not too low to miss screening the potential defects, or too high to induce an aging damage.

  Numerical simulation analysis can immediately provide the results for whole cards or even for different layers under various loading conditions, and experimental results are good reference for theoretical modification of boundary conditions. Therefore using Finite Element Analysis software to verify finite testing results is the most reasonable and effective method to easily obtain proper Environmental Stress Screens. 

  As traditional FEM is very time consuming and experience oriented, it cannot release the pressure of product's time-to-market. AEC software is dedicated for fatigue evaluations of electronic circuit cards and helps quickly build FEM models. Fatigue damage differences due to changes in frequency or transmissibility response of test units are easily evaluated. By concentrating on the results, the user can gain an understanding of life-usage and draw on experience to optimize environmental stress screens or optimize design capabilities.