Laboratory investigation on energy dissipation and damage characteristics of frozen loess during deformation process
作者： Xiangtian Xu , Yuanhong Dong , Caixia Fan
DOI: 10.1016/J.COLDREGIONS.2014.09.006
关键词:
摘要: Abstract For investigating the energy dissipation and damage behavior of frozen loess during deformation process under triaxial compression, besides compression (TC) tests, a series static loading-unloading cyclic (TLUC) tests corresponding to TC were carried out confining pressures from 0.5 MPa 9.0 MPa at temperature − 6 °C. It could be found these two types that loading stages TLUC test curves almost coincided different pressure conditions. The influence on stress–strain was similar. results showed occurred in unloading–reloading elastic modulus changed with increase strain. Dissipative value increased first then decreased pressure. A variable defined based fact degeneration modulus. experimental also indicated there existed an initial sample before loading. According this phenomenon, method for recognizing undamaged state proposed. threshold evolution law obtained results. characteristics analyzed. conclusion can drawn increasing lower pressure, but further as melting crushing phenomena caused by higher levels.
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