TY  - SER
AU  - Balokhonov,Ruslan R.
AU  - Zemlianov,Aleksandr
AU  - Romanova,Varvara A.
AU  - Bakeev,R.
AU  - Evtushenko,Eugene
TI  - Computational analysis of the influence of thermal residual stresses on the strength of metal-matrix composites
KW  - численное моделирование
KW  - термическое напряжение
KW  - металломатричные композиционные материалы
KW  - локализация пластической деформации
KW  - статьи в журналах
N1  - Библиогр.: с. 63
N2  - Deformation and fracture in metal-matrix composite materials is investigated during cooling followed by tension or compression. Microstructure of the composite comprising aluminum matrix and single boron carbide particle of irregular experimentally observed shape – is taken into account explicitly in calculations. Constitutive models describe isotropic elastoplastic and elastic or elastic-brittle behavior of the aluminum matrix and ceramic particles, respectively. Huber type fracture criterion takes into consideration the crack origination and growth in material local regions experiencing bulk tension. Developed numerical method used to simulate three-dimensional geometry of ceramic particles assumes the invariance of the mechanical fragmentation of rocks and brittle materials. Three-dimensional and plane-stress boundary-value problems in the dynamic formulation are solved numerically by the finite-element software package ABAQUS. Deformation of the composite subjected to tension from the initial undeformed state is compared to that produced by tension being a successor of the composite cooling from the recrystallization to room temperatures. Residual thermal stresses are found to increase the strength of the composite and change the fracture patterns from in-particle cracking to debonding
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000925251
ER  -