Void-crack interaction in aluminum single crystal

X. M. Li; Fu-Pen Chiang

doi:10.1117/12.49548

1 December 1991 Void-crack interaction in aluminum single crystal

X. M. Li, Fu-Pen Chiang

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.49548
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Three-dimensional moire interferometry technique has been used to study the interaction between cylindrical void/voids and an edge crack in aluminum single crystals. Tensile specimens made of aluminum single crystal have crystal orientation with crack surface on (102) plane and its tip along [251] direction, and undergo power-law hardening with hardening index of n = 3.43. Deformation fields near and in-between the crack tip and the cylindrical void/voids are quantitatively obtained and analyzed. The results show that voids inclined to crack surface at ±30° have greater influence on deformation field than those directly ahead of crack tip; the effects of voids on near tip deformation field are found to be significant in the region between —60° to +60°. It is also observed that the very near tip deformation fields are characterized by the formation of angular sectors in which equivalent strain and maximum shear strain are independent of 6 within certain sectors, and change abruptly across sector boundaries. This is consistent with the experimental results of Li et al 28, in which single crystal crack tip deformation field without the presence of void/voids were investigated.

Citation Download Citation

X. M. Li and Fu-Pen Chiang "Void-crack interaction in aluminum single crystal", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.49548

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