A Numerical Study of Plastic Strain Localization and Fracture in Al/SiC Metal Matrix Composite
| Autor: | Sergey Smirnov, A. S. Smirnov, A. V. Konovalov, Yu. V. Khalevitsky, M. V. Myasnikova, A. S. Igumnov |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Metal matrix composite Composite number 02 engineering and technology Surfaces and Interfaces Plasticity 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Finite element method 020303 mechanical engineering & transports 0203 mechanical engineering Rheology Mechanics of Materials General Materials Science Composite material 0210 nano-technology Microscale chemistry Stress concentration |
| Zdroj: | Physical Mesomechanics. 21:305-313 |
| ISSN: | 1990-5424 1029-9599 |
| DOI: | 10.1134/s1029959918040045 |
| Popis: | Plastic deformation and fracture of Al/SiC metal matrix composite have been numerically simulated in three mechanical tests (tension, compression, shear) with account for the microstructure and rheology of the composite components. A description is given of the formation mechanisms of stress concentration zones and local plastic deformation zones which make the stress-strain state inhomogeneous on the microscale. Distribution fields are obtained for the stress stiffness coefficient and the Lode-Nadai coefficient depending on the strain. Damage accumulation is simulated and damage distribution fields in the composite matrix are constructed with regard to the revealed stress-strain evolution laws. The strain dependences of the fraction of finite element nodes for which the fracture condition is fulfilled are determined. The dependences are used to estimate the damage accumulation rate in the composite matrix for each type of loading. |
| Databáze: | OpenAIRE |
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