Application of a unified viscoplastic model to simulation of autoclave age forming

Article Abstract:

A mathematical model for analyzing autoclave age forming is developed from a synthesis of constitutive and Bernoulli/Euler equations. The model is used in a research where aluminum 7075 alloy rectangular beams were age formed into curved beams. The thermal stresses are negligible and that the elastic line could be estimated by circular arc and the contact between the part and the tool occurs simultaneously. Results obtained with the model agree with experimental data.

Evaluation

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Viscoplastic model development with an eye toward characterization

Article Abstract:

A theory developed for viscoplasticity is capable of undergoing analytical simplification to creep theory in the presence of steady-state conditions. Characterization of material functions associated with the physics of inelasticity helps develop a viscoplastic model within the limits of the theory. Monotonic stress strain curves, steady-state creep data and saturated stress-strain hysteresis loops are essential for the characterization of the model.

Models, Plasticity

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A simulation procedure for panel age forming

Article Abstract:

An innovative method can be utilized in simulating the autoclave age forming of panels. The method is divided in three phases which include loading, aging and unloading. Since autoclave age forming is suitable in various aerospace applications, mathematical modeling of panel age forming through the simulation process may yield important information in determining the usability of materials.

Usage, Mathematical models, Materials, Creep (Materials), Plates (Engineering), Metal plates (Building materials), Stress relaxation (Materials)

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