Short-term microdamage of laminated material with nonlinear matrix and microdamaged reinforcement |
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Authors: | L P Khoroshun E N Shikula |
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Institution: | (1) S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kiev |
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Abstract: | A structural theory of short-term microdamage is proposed for a two-component laminated composite with microdamageable reinforcement
and physically nonlinear matrix. The basis of the theory is the stochastic elasticity equations of a laminated composite with
a porous reinforcement. Microvolumes in the reinforcement material meet the Huber-Mises failure criterion. The damaged-microvolume
balance equation for the reinforcement is derived. This equation and the equations relating macrostresses and macrostrains
of a laminated composite with porous reinforcement and physically nonlinear matrix constitute a closed-form system of equations.
This system describes the coupled processes of physically nonlinear deformation and microdamage occurring in different composite
components. Algorithms for computing the microdamage-macrostrain relationships and deformation diagrams are developed. Uniaxial
tension curves are plotted for a laminated composite with linearly hardening matrix
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Translated from Prikladnaya Mekhanika, Vol. 41, No. 12, pp. 3–12, December 2005. |
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Keywords: | laminated composite microdamaged reinforcement physically nonlinear matrix coupled processes of physically nonlinear deformation and microdamage |
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