A theory of long-term damage of particulate composite materials under thermal load is proposed. The damage of the composite components is modeled by randomly dispersed micropores. The failure criterion for a single microvolume is determined by its stress-rupture strength, which, in turn, is determined by the dependence of the time to brittle failure on the difference between the equivalent stress and its limit, which characterizes the ultimate strength according to the Schleicher–Nadai criterion. The damage (porosity) balance equation is derived for an arbitrary time, taking the thermal effect into account. Algorithms for calculating microdamage and macrostresses as functions of time are developed
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Translated from Prikladnaya Mekhanika, Vol. 46, No. 10, pp. 25–35, October 2010.
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Khoroshun, L.P., Shikula, E.N. Deformation and long-term damage of particulate composites under thermal loads. Int Appl Mech 46, 1110–1118 (2011). https://doi.org/10.1007/s10778-011-0403-z
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DOI: https://doi.org/10.1007/s10778-011-0403-z