Finite element analyses of near-tip deformation in inhomogeneous elastic-plastic fracture specimens
| Autor: | Toshihisa Nishioka, Yutaka Kobayashi, Takehiro Fujimoto, Jonathan S. Epstein |
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| Rok vydání: | 1995 |
| Předmět: |
Yield (engineering)
Materials science business.industry Mechanical Engineering Numerical analysis Structural engineering Moiré pattern Finite element method Elastic plastic Nonlinear system Mechanics of Materials Fracture (geology) General Materials Science Deformation (engineering) Composite material business |
| Zdroj: | International Journal of Pressure Vessels and Piping. 63:277-291 |
| ISSN: | 0308-0161 |
| DOI: | 10.1016/0308-0161(94)00038-k |
| Popis: | Two types of path-independent expressions were derived for the nonlinear fracture parameter T ∗ integral in inhomogeneous multilayer materials. Finite element analyses were carried out for inhomogeneous elastic-plastic fracture specimens consisting of A533B steel and HT80 steel: these two materials have considerably different yield stresses, although their elastic properties are exactly the same. The T ∗ -integral for inhomogeneous materials demonstrated excellent path independence even in the stages of large deformations around the crack tip and material interfaces. Numerically generated moire fringe patterns are in good agreement with experimentally recorded patterns. The shapes of plastic zones appearing in the specimens reveal large inhomogeneity effects. The applicability of a hybrid moire-finite element method is demonstrated briefly. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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