Deformation and long-term damage of physically nonlinear particulate composites |
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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,Kyiv,Ukraine |
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Abstract: | The theory of long-term damage is generalized to particulate composite materials with physically nonlinear components. The
damage of the components is modeled by randomly dispersed micropores. The damage criterion for a microvolume is characterized
by its stress-rupture strength. It is determined by the dependence of the time to brittle failure on the difference between
the equivalent stress and its limit, which is the ultimate strength, according to the Huber–Mises criterion, and assumed to
be a random function of coordinates. An equation of damage (porosity) balance in the components at an arbitrary time is formulated.
Algorithms of calculating the time dependence of are developed. The effect on the nonlinearity of the matrix on the damage
and macrodeformation curves is examined |
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Keywords: | |
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