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- Article name
- Modeling of linear thermo-visco-elastic behavior of spatial-reinforced composites
- Authors
- YANKOVSKII A. P., , lab4nemir@rambler.ru, yankovsky_ap@rambler.ru, Khristianovich Institute of Theoretical and Applied Mechanics, the Siberian Branch of the Russian Academy of Science, Novosibirsk, Russia
- Keywords
- composite material / spatial structure of reinforcement / defining relationships / structural theory / linear thermo-viscous elasticity / creep / method of time steps / Maxwell-Thomson model
- Year
- 2016 Issue 2 Pages 3 - 14
- Code EDN
- Code DOI
- Abstract
- Based on the method of time steps the numerical-analytical technique is developed for simulation of linear viscoelastic behavior of spatial-reinforced composite with heat. All phase materials of composition is assumed to be anisotropic and stable. Their thermo-mechanical behavior is described by the Maxwell-Thomson model for the generalized body. In addition linear viscous flow is superposed on hereditary elastic deformation, which allows describing unlimited creep. This approach allowed in discrete moments of time to consider the mechanical condition of such composite media as linear-thermal-elastic with initial stress state. Due to the properties of degeneracy differential of exponential relaxation kernels describing hereditary properties within the Maxwell-Thomson model of the body, modeling technique was able to organize so that there is no need to recalculate the entire history of deformation of each representative of the element of composition in the transition from one moment to the next. The calculations are carried out for creep of polymer material with two spatial structures of reinforcement of aluminum wires and boron fibers. It is shown that the reinforcement of the polymer, such as boron fibers, allow to decrease its deformation under creep almost twice when increasing the volumetric density of the composite material is not more than 10 %.
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