Finite element analysis (FEA) was used to study the snap-through of bi-stable laminate. Along with displacement load, the “static stabilize” algorithm in ABAQUS was employed in FEA. Two kinds of finite models, a two-step model (with internal thermal stress) and an one-step model (without internal thermal stress) were presented. The results show that the thickness defect of specimen must be considered, the error of critical load predicted by the modified two-step model which considers thickness defect is 0.7%. Comparison between one-step model and two-step model indicates that when the deformation is small, the one-step model is accurate and more convenient. Otherwise, the two-step model must be employed.
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