An isotropic damage model based on fracture mechanics for concrete
| Autor: | Takashi Kyoya, Kazuo Kashiyama, Kenjiro Terada, Junji Kato, Mao Kurumatani |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Dependency (UML)
Materials science business.industry Mechanical Engineering Isotropy Energy balance Fracture mechanics 02 engineering and technology Bending Structural engineering 021001 nanoscience & nanotechnology Finite element method 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Benchmark (computing) Fracture (geology) General Materials Science 0210 nano-technology business |
| Zdroj: | Engineering Fracture Mechanics. 155:49-66 |
| ISSN: | 0013-7944 |
| DOI: | 10.1016/j.engfracmech.2016.01.020 |
| Popis: | This paper presents an isotropic damage model for quasi-brittle materials and demonstrates its performance in crack propagation analysis for concrete. The suggested damage model is based on fracture mechanics for concrete in terms of the fracture energy and is therefore capable of simulating strain-softening behavior without mesh-size dependency. After the cohesive crack model is incorporated into a damage model in a 1D setting, the 1D model is extended to multi-dimensional problems by means of the equivalent strain of the modified von-Mises model. Several numerical examples are presented to examine the fundamental characteristics of the proposed damage model. In particular, we demonstrate that finite element solutions with the damage model are independent of mesh size and that the energy balance evaluated for the fracture process in a three-point bending test for a specimen with a single-edge notch is consistent with the fracture energy. A benchmark test for a mixed-mode fracture is also conducted to demonstrate the performance of the proposed damage model. |
| Databáze: | OpenAIRE |
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