Mechanical hysteresis due to microplasticity in alumina with microcracks |
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| Authors: | Y. Nishino H. Ogawa S. Asano |
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| Affiliation: | Department of Materials Science and Engineering , Nagoya Institute of Technology , Nagoya, 466, Japan |
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| Abstract: | Abstract Stress-strain hysteresis in alumina with microcracks has been investigated by a loading–unloading test in the microstrain range around 10 ?4 While there remains a permanent strain after the initial loading, steady-state cyclic loading results in a single closed hysteresis loop with a symmetrical shape. Such a stabilized hysteresis loop is responsible for internal friction and can be attributed to the microplasticity associated with a forerunning phenomenon of fracture. |
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