Size-independent fracture energy of concrete at very early ages by inverse analysis
| Autor: | Emmanuel Rozière, Mohammed Matallah, Frédéric Grondin, Mounia Farah, Ahmed Loukili |
|---|---|
| Přispěvatelé: | Matériaux Environnement Ouvrages (MEO), Institut de Recherche en Génie Civil et Mécanique (GeM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
0211 other engineering and technologies Inverse analysis 02 engineering and technology Bending Physics::Geophysics [SPI.MAT]Engineering Sciences [physics]/Materials 0203 mechanical engineering 021105 building & construction Fracture energy Boundary effects General Materials Science Displacement (orthopedic surgery) Softening Early ages business.industry Mechanical Engineering Fracture mechanics Structural engineering [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph] Finite element method Nonlinear system 020303 mechanical engineering & transports Mechanics of Materials Fracture (geology) business |
| Zdroj: | Engineering Fracture Mechanics Engineering Fracture Mechanics, Elsevier, 2013, 109, pp.1-16. ⟨10.1016/j.engfracmech.2013.05.016⟩ |
| ISSN: | 0013-7944 |
| Popis: | International audience; This paper deals with the analysis of fracture characteristics of concrete at very early ages. Experimentally, three-point bending tests are performed on concrete notched beams at very early age (before 24 h) to obtain the Load-Crack Mouth Opening Displacement (CMOD) curves. In order to find a trend of the fracture energy evolution, inverse analysis procedure is performed using finite element analysis. A damage softening model is used to describe the softening behaviour and a nonlinear inverse analysis algorithm (Levenberg-Marquardt) is adopted. As the softening damage model used does not take into account boundary effects, only a part of the Load-CMOD curves is fitted. Therefore, a good estimation of the size-independent fracture energy is obtained. The results obtained from the experimental test and the inverse analysis indicate an upward trend of the evolution of the fracture energy and other fracture concrete characteristics. |
| Databáze: | OpenAIRE |
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