Role of anisotropic strength and stiffness in governing the initiation and propagation of yielding in polycrystalline solids
| Autor: | Paul R. Dawson, Andrew C. Poshadel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Yield (engineering)
Materials science Yield surface 0211 other engineering and technologies FOS: Physical sciences 02 engineering and technology engineering.material 01 natural sciences 0103 physical sciences medicine Austenitic stainless steel Anisotropy 021102 mining & metallurgy 010302 applied physics Condensed Matter - Materials Science Structural material Aggregate (composite) business.industry Metallurgy Metals and Alloys Materials Science (cond-mat.mtrl-sci) Stiffness Structural engineering Mechanics Condensed Matter Physics Finite element method Mechanics of Materials engineering medicine.symptom business |
| Popis: | The ratio of directional strength-to-stiffness is important in governing the relative order in which individual crystals within a polycrystalline aggregate will yield as the aggregate is loaded. In this paper, a strength-to-stiffness parameter is formulated for multiaxial loading that extends a similar parameter developed specifically for uniaxial loading. Building on the principle of strength-to-stiffness, a methodology for predicting the macroscopic stresses at which elements in a finite element mesh yield is developed. This analysis uses elastic strain data from one increment of a purely elastic finite element simulation to make the prediction, given knowledge of the single-crystal yield surface. Simulations of austenitic stainless steel AL6XN are used to demonstrate the effectiveness of the strength-to-stiffness parameter and yield prediction methodology. |
| Databáze: | OpenAIRE |
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