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A method of simulating the age forming of initially flat panels is proposed. It conceptually divides the process into three phases (loading, aging, and unloading) and simulates each phase separately. Some sample simulations are presented for 7075 aluminum alloy based on a simplified version of the general procedure (linear loading and unloading, nonlinear aging). The results of these simulations are used to illustrate several aspects of the predictions. An interesting finding is that the part shape and tool shape are geometrically similar in two important special cases.

Professor Foroudastan is involved with several professional organizations and honor societies, and has many publications to his name. He also holds U.S. and European patents.

A unified viscoplastic constitutive equation is combined with Bernoulli/Euler beam equations to create a model of autoclave age forming of beam specimens. Predictions based on the model are obtained numerically and compared with experimental data. Encouraging agreement is found between simulations and observations. Issues related to extensions of the methodology to more complicated geometries are discussed.