EFFECTS OF GEOMETRY ASPECTS ON THE SIMULATION OF SUPERPLASTICITY IN MMC COMPOSITES

摘要

In aerospace applications, the weight of structures is considered as a major performance parameter. One of the most effective ways for weight reduction is superplastic forming. By this technique, not only the weight, but also the stress concentration, the cost, and the time of manufacturing are noticeably reduced. Additionally, the components with complicated shapes could be formed in a single manufacturing step. Due to the wide demand for whiskers reinforced metal matrix composites (MMC's) in aerospace applications, many research works have been designed to extend the boarders of superplastic forming of metals to the area of MMC manufacturing. In the present study, the FEM modeling of superplasticity in MMC's is simulated with a micromechanical axisymmetric model. The results are in a good agreement with available experimental data. Various aspects have been considered to show the capabilities of the model to analysis and predict the superplastic behavior of MMC's.