The interaction between a crack and a dislocation dipole

✍ Scribed by Roberto Ballarini; Mitsunori Denda

• Publisher: Springer Netherlands
• Year: 1988
• Tongue: English
• Weight: 445 KB
• Volume: 37
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00017823

✦ Synopsis

This paper presents the results of an analysis which considers the interaction between a semi-infinite crack and a dislocation dipole. Applying the operator derived by Denda [1] to the crack/dislocation interaction solution developed by Lo [2], explicit expressions are obtained for the stress intensity factors at the tip of the crack. Results are computed and discussed for a variety of geometrical configurations, with the intent of developing an understanding of the effects of position and orientation of the dislocation dipole on crack tip shielding and antishielding. The solution can be used as a Green's function in semi-empirical analyses such as the one proposed by Chudnovsky [3], where the interaction between a crack in a polymeric material and the damage (crazing) which surrounds it is solved by experimentally measuring the crack opening displacements of the crazes and calculating the amount of toughening caused by the damage.