Creep Characteristics of Mudstone under Devastating or Integrated States by Uniaxial Tests

Abstract:

Based on general instantaneous strength test and uniaxial creep tests under devastating or integrated states, strain characteristics of mudstone in different stages have been determined. Analyzing strain features of mudstone developing in every stage of different tests, evolving creep law of mudstone under uniaxial devastating state may be validated, which axial limited creep strain under the decided loading standard is equal to that value at uniaxial complete strain-stress curve rearwards ultimate strength. Relationship between designed loading stress and its corresponding creep strain can be linear in uniaxial creep test of mudstone under integrated state, while must not be a determinate secant of uniaxial complete strain-stress curve. Studying results present that terminal creep strain of rock with certain loading levels and under devastating state can be only corresponded with an exclusive point of traditional uniaxial complete strain-stress curve rearwards the ultimate strength, and the extended limited creep courses of mudstone will answer for Boltzmann function.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 16-21
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.16
• Online since: October 2012
• Authors: Sheng Zhong, Chuan Xiao Liu, Zhi Hao Liu, Long Wang
• Keywords: Boltzmann Function, Creep Test, Limited Creep Course, Mudstone, Strain Characteristics

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