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Effect of size and slope angle of tooth-shaped asperity on shear fracturing characteristics

삼각형 돌출부의 크기 및 경사각이 전단파괴 형상 특성에 미치는 영향

  • Kim, Won-Keun (Korea Water Resources Corporation) ;
  • Choi, Woo-Yong (Konkuk University, Dept. of Civil and Environmental System Engineering) ;
  • Park, Jong-Deok (Konkuk University, Dept. of Civil and Environmental System Engineering) ;
  • Lee, Seok-Won (Konkuk University, Dept. of Civil and Environmental System Engineering)
  • 김원근 (한국수자원공사) ;
  • 최우용 (건국대학교 사회환경시스템공학과) ;
  • 박종덕 (건국대학교 사회환경시스템공학과) ;
  • 이석원 (건국대학교 사회환경시스템공학과)
  • Received : 2013.07.04
  • Accepted : 2013.07.26
  • Published : 2013.07.31

Abstract

Most of previous studies have insufficiently investigated the shear behavior and fracturing characteristics, experimentally in respect to the change of size of tooth-shaped surface asperity such as length and slope angle in a broad range. This study investigates the influence of the length and slope angle of a tooth-shaped surface asperity on the fracturing characteristics and the interface shear strength by using direct shear test apparatus. A total of 36 interface direct shear tests were conducted by changing the three types of slope angle of surface asperity, four type of length, and three types of normal stress. The shape of fractured surface after the test was quantified by using a three-dimensional surface roughness measurement apparatus. Through the experimental test results, the characteristics of fractured shape of surface asperity according to the normal stress were investigated. In addition, fractured length and height were quantified at each slope angle of surface asperity under a certain normal stress condition.

Acknowledgement

Supported by : 한국연구재단

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