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- W252511743 abstract "Abstract The deformation characteristics of basalt rocks subjected to cyclic uniaxial stress and cyclic temperature were investigated, and a corresponding damage model was established. Cyclic uniaxial stress–temperature tests were conducted in which stress upper limit was 80% or 65% of the uniaxial compressive strength and peak temperature was 60 °C or 90 °C. A damage model for rocks subjected to cyclic stress–temperature was proposed, which applied statistical damage mechanics and continuum damage mechanics. Cyclic stress–temperature tests exhibited superposition of cyclic stress and temperature effects. Basalt specimens were damaged gradually as the cycle number increased, and failed in cycles where maximum stress was 80% of the uniaxial compressive strength. However, the specimens hardened and did not fail when maximum stress was 65% of the uniaxial compressive strength and the highest temperature was 60 °C. The peak strain of damaged specimens underwent initial, steady, and acceleration stages; the Young׳s modulus decreased rapidly in the initial cycles, but the reduced rate decreased further in subsequent cycles. The peak and residual strains of hardened specimens decreased as the cycle number increased. However, the Young׳s modulus had an opposite trend; moreover, the higher the temperature, the less the Young׳s modulus increased. The proposed damage model can be degenerated into existing models or be regarded as an extension of them." @default.
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- W252511743 date "2015-07-01" @default.
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- W252511743 title "Damage modeling of basaltic rock subjected to cyclic temperature and uniaxial stress" @default.
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- W252511743 doi "https://doi.org/10.1016/j.ijrmms.2015.03.038" @default.
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