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;Ahn, Soo-Ick
조종두;안수익

  • Published : 1996.10.01

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

Thermal Impact;Stress Intensity Factor;Dislocation Density;Climb Dislocation;Glide Dislocation