Discontinuum analysis of the fracture mechanism in masonry prisms and wallettes via discrete element method
| Autor: | Bora Pulatsu, Ece Erdogmus, Paulo B. Lourenço, José V. Lemos, Jim Hazzard |
|---|---|
| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Computer science
Context (language use) 02 engineering and technology 01 natural sciences Softening 0203 mechanical engineering Engenharia e Tecnologia::Engenharia Civil 0103 physical sciences Masonry 010301 acoustics Brickwork Computational model Science & Technology business.industry Mechanical Engineering DEM Fracture mechanics Structural engineering Condensed Matter Physics Discrete element method Discontinuum analysis Contact mechanics 020303 mechanical engineering & transports Mechanics of Materials Fracture (geology) Engenharia Civil [Engenharia e Tecnologia] Mortar business |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | This study proposes an alternative approach to modeling the failure mechanisms of brickwork assemblages under combined shear-compression, shear-tension (parallel to bed joints), and compression-flexural loadings using the discrete element method (DEM). In this context, recently developed elastic-softening contact constitutive laws considering the mode-I and mode-II fracture energies are implemented into the dynamic solution scheme of the DEM to simulate the mechanical interaction between mortar and masonry units represented via 3D polyhedral blocks. Different experimental studies from the literature are used to validate the proposed computational models, and good agreement is found in terms of strength, material behavior, and fracture mechanisms. The findings of this research indicate that the proposed modeling strategy is successful in predicting the macro behavior of masonry under various complex fracture modes based on the defined micro properties. Sensitivity analyses are also performed by varying the fracture energy and valuable inferences are made with respect to the stress-displacement response and failure mechanisms of masonry. (undefined) |
| Databáze: | OpenAIRE |
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