EVALUATION OF THERMAL EFFECTS AND STRAIN-RATE SENSITIVITY IN FROZEN SOIL

Abstract

Temperature variation is one important factor that affects the dynamic mechanical properties of frozen soil under impact loading. Thermal damage is a collective phenomenon that can be caused by temperature variation. This paper investigates the effects of thermal damage on strain course. A split Hopkinson pressure bar was employed to investigate the dynamic mechanical characteristics of frozen soil at different temperatures and different strain rates. The stress-strain curves were obtained under impact loading. The compressive strength of frozen soil showed a negative temperature sensitivity and positive strain-rate trend. Specifically, the strength of frozen soil increased with decreasing temperatures and increasing strain rates.

Keywords

Dates

  • Submission Date2013-11-27
  • Revision Date2014-04-30
  • Acceptance Date2014-07-02
  • Online Date2015-01-04

DOI Reference

10.2298/TSCI1405631Z

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