Nonlinear implementation of Finite Fracture Mechanics: A case study on notched Brazilian disk samples
| Autor: | Alberto Giuseppe Sapora, Aurélien Doitrand |
|---|---|
| Přispěvatelé: | Science et Ingénierie des Matériaux et Procédés (SIMaP ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Politecnico di Torino = Polytechnic of Turin (Polito) |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Circular holes Applied Mathematics Mechanical Engineering Ramberg–Osgood model Nonlinearities Linear elasticity Energy balance Finite Fracture Mechanics 02 engineering and technology Mechanics [PHYS.MECA]Physics [physics]/Mechanics [physics] 021001 nanoscience & nanotechnology Finite fracture mechanics Stress (mechanics) Brazilian disk tests Nonlinear system 020303 mechanical engineering & transports Circular hole 0203 mechanical engineering Mechanics of Materials 0210 nano-technology |
| Zdroj: | International Journal of Non-Linear Mechanics International Journal of Non-Linear Mechanics, Elsevier, 2019, pp.103245. ⟨10.1016/j.ijnonlinmec.2019.103245⟩ |
| ISSN: | 0020-7462 |
| Popis: | International audience; We formalize the coupled criterion (CC) in the framework of Finite Fracture Mechanics (FFM) to take into account the material nonlinear behavior. Once the true stress–strain curve is recorded, we estimate the Ramberg–Osgood (RO) parameters. We then exploit these values in the FFM numerical implementation, considering both an average stress requirement and the energy balance. As a case study, we consider experimental data on Brazilian disks containing a circular hole and involving two materials — PMMA and GPPS. The computational effort of the analysis increases with respect to the linear elastic case, but keeps reasonable. On the other hand, the nonlinear FFM investigation allows a significant improvement of the failure stress predictions, especially those related to smaller holes corresponding to a more pronounced nonlinear behavior detected during tests. |
| Databáze: | OpenAIRE |
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