Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Study on the Behavior of a Center Crack under Thermal Impact by the Dislocation Theory

전위이론에 의한 열충격하의 균열거동에 관한 연구

  • Cho, Chong-Du (Dept.of Mechanical Engineering, Inha University) ;
  • Ahn, Soo-Ick (Dept.of Mechanical Engineering, Graduate School of Inha University)
  • 조종두 (인하대학교 기계공학과) ;
  • 안수익 (인하대학교 대학원 기계공학과)
  • Published : 1996.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper investigated plane strain stress intensity factors caused by thermal impact on a center-crack strip. The crack was aligned perpendicularly to the strip boundary. The problem was analysed by determining the dislocation density function in the singular integral equations formulated by the dislocation theory. Under the abrupt temperature change along the edge, the center crack behaved as a mode I crack due to the symmetric geometry. The value of maximum stress intensity factor monotonically increased until the ratio of dimensionless crack length approached to about 0.3, followed by gradual decrease. As a result, a critical corresponding crack length was determined.

Keywords