A Summary of the Bodner-Stouffer Constitutive Model
Aircraft structures technical memo.
AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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Classical techniques of modelling creep and plasticity have a high degree of accuracy provided the inelastic strains are kept small. However, they are poor in describing material behaviour where significant inelastic strains or unloading are involved. In a recent investigation, a number of unified constitutive models were examined. In these approaches, a single inelastic strain tensor is used to model both creep and plasticity. A new constitutive equation was then proposed. This report describes this new approach, and discusses a FORTRAN program which uses these new equations to predict material behaviour of high temperature superalloys. Given either stress or stain values as input data, it evaluates the state variables, i.e., drag stress, back stress etc., the ineleastic strain rate and the inelastic work. Keywords One dimensional Australia.
- Metallurgy and Metallography