Strain energy density approach to stable crack extension under net section yielding of aircraft fuselage
| Autor: | G.C. Sill, David Y. Jeong, O. Orringer |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Materials science
business.industry Applied Mathematics Mechanical Engineering Strain energy density function Fracture mechanics Structural engineering Condensed Matter Physics Residual strength Stress (mechanics) Stress field Crack closure Fuselage Tearing General Materials Science Composite material business |
| Zdroj: | Theoretical and Applied Fracture Mechanics. 22:127-137 |
| ISSN: | 0167-8442 |
| DOI: | 10.1016/0167-8442(94)00053-4 |
| Popis: | In this paper, the incremental theory of plasticity is used in conjunction with the strain energy density criterion to determine the stress field in 4-in. wide test specimens containing 3 holes. These specimens, made from 0.04-in. thick sheets of 2024-T3 aluminum, also contained small collinear cracks emanating from the holes. The initial crack sizes varied from 0.15 to 0.26 in. Residual strength tests conducted with these specimens revealed that stable tearing occurred before failure. Analyses were performed to predict the stable crack extension and failure by plastic collapsed. Because of the complexities involved with nonlinear stress analysis combined with subcritical crack extension, the finite element method was used with the grid pattern adjusted for each increment of stable tearing. Reasonable correlation between the experimental data and predicted results was achieved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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