Experimental and theoretical characterization of mixed mode brittle failure from square holes
| Autor: | Aurélien Doitrand, Alberto Giuseppe Sapora, Pietro Cornetti, Rafael Estevez |
|---|---|
| Přispěvatelé: | Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Computational Mechanics Mode (statistics) 02 engineering and technology Mechanics [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph] 01 natural sciences Square (algebra) Finite element method Characterization (materials science) 010101 applied mathematics 020303 mechanical engineering & transports Brittleness Fracture toughness 0203 mechanical engineering Mechanics of Materials Deflection (engineering) Modeling and Simulation Point (geometry) 0101 mathematics |
| Zdroj: | International Journal of Fracture International Journal of Fracture, Springer Verlag, 2021, 228 (1), pp.33-43. ⟨10.1007/s10704-020-00512-9⟩ |
| ISSN: | 0376-9429 1573-2673 |
| Popis: | International audience; Mixed mode crack initiation in PMMA specimens containing square holes is investigated experimentally by uniaxial tensile tests. The crack deflection with respect to the V-notch bisector and the failure load both increase for decreasing hole sizes, to which correspond higher mode mixities. In order to catch this behavior from a theoretical point of view, Finite Fracture Mechanics (FFM) approach is employed numerically through a full finite element analysis. The FFM implementation requires only two material parameters, namely the strength and the fracture toughness. They are identified through the comparison between failure load predictions and experimental measurements on circular holes with different diameters. The resulting FFM blind predictions on square holes are in good agreement with recorded data. Finally, FFM is implemented through an asymptotic matching expansion procedure and an excellent matching with the previous simulations is found. |
| Databáze: | OpenAIRE |
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