On the unloading solution by viscoplastic BEM of axisymmetric pressure vessels with three material hardening models
| Autor: | Yong Liu, Qichao Hong |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Engineering
Viscoplasticity business.industry Mechanical Engineering Bauschinger effect Structural engineering Strain hardening exponent Physics::Classical Physics Finite element method Pressure vessel Nonlinear system Mechanics of Materials Hardening (metallurgy) General Materials Science business Boundary element method |
| Zdroj: | International Journal of Pressure Vessels and Piping. 58:41-50 |
| ISSN: | 0308-0161 |
| Popis: | This paper presents a viscoplastic boundary element formulation and numerical implementation of the nonlinear unloading problem of axisymmetric pressure vessels with new material hardening models for which the reverse yield stress does not lie between the kinematic hardening yield stress and the isotopic hardening yield stress of present nonlinear theory. Three nonlinear unloading stress-strain models of high strength low alloy steel with both the strain hardening and Bauschinger effect factor are discussed. The modified Aitken method is used for the unloading iteration process. Comparisons of this paper's results with the data of FEM and experiment are given. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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