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Analysis of Contact Singular Stresses with Relief Notch by Using Dynamic Photoelasticity(II)

동적 광탄성실험에 의한 응력이완 노치부근에서의 접촉특이응력 해석 (2)

  • Lee, Eok-Seop (Dept.of Mechanical Engineering, Inha University) ;
  • Hwang, Si-Won (Dept.of Mechanical Engineering, Graduate School of Inha University) ;
  • Nah, Gyeong-Chan (Dept.of Mechanical Engineering, Graduate School of Inha University)
  • 이억섭 (인하대학교 기계공학과) ;
  • 황시원 (인하대학교 대학원 기계공학과) ;
  • 나경찬 (인하대학교 대학원 기계공학과)
  • Published : 1996.07.01

Abstract

The dynamic photoelastic technique had been utilized to investigate the possibillity of relieving the large local singular stresses induced at the corner of a right- angle- indenter. The indenter compressed a semi-infinite body dynamically with an impact load applied on the top of the indenter. The effects of the geometric changes of the indenter in terms of the diameter (d) and the location (1) of the stress relieving notch on the behavior of the dynamic contact stresses were investigated. The influence of stress relieving notches positioned along the edge of the semi-infinite body on the dynamic contact stresses were also studied by changing the diameter (D) and the location (L) of the notch. A multi-speak-high speed camera with twelve sparks were used to take photographs of full field dynamic isochromatic fringe patterns. The contact singular stresses were found to be released significantly by the stress relief notches both along the indenter and the edge of the semi-infinite body. The optimal position and geometry of the stress relieving notches were obtained with the aid of limited experimental results.

Keywords

Dynamic Photoelastic Analysis;Indenter;Contact Singular Stresses;Fringe Pattern;Stress Relief Notch;Stress Concentration Factor(SCF)