Stress concentration of a crack-like spheroidal cavity lying on the prism plane of hexagonal crystals

2017 ◽  
Vol 184 ◽  
pp. 218-226 ◽  
Author(s):  
Chun-Ron Chiang
Keyword(s):  
Stress Concentration ◽  
Prism Plane ◽  
Spheroidal Cavity ◽  
Hexagonal Crystals

scholarly journals Stress Concentration around a Prolate Spheroidal Cavity in a Semi-infinite Elastic Body Under All -round Tension

1982 ◽  
Vol 25 (202) ◽  
pp. 493-500 ◽  
Author(s):  
Eiichiro TSUCHIDA ◽  
Yoshiyuki SAITO ◽  
Ichiro NAKAHARA ◽  
Masao KODAMA
Keyword(s):  
Stress Concentration ◽  
Elastic Body ◽  
Prolate Spheroidal ◽  
Spheroidal Cavity

Stress Concentration Around Spheroidal Inclusions and Cavities in a Transversely Isotropic Material Under Pure Shear

1970 ◽  
Vol 37 (1) ◽  
pp. 85-92 ◽  
Author(s):  
W. T. Chen
Keyword(s):  
Exact Solution ◽  
Shear Stress ◽  
Isotropic Material ◽  
Pure Shear ◽  
Transversely Isotropic ◽  
Transversely Isotropic Material ◽  
Elementary Functions ◽  
Stress Concentrations ◽  
Spheroidal Cavity ◽  
Hexagonal Crystals

This paper presents an exact solution for the stress distribution around an elastic spheroidal inclusion in an infinite transversely isotropic elastic body which is otherwise under a pure shear stress. The stresses and displacements are expressed in terms of elementary functions. The technically important consideration of the stress concentrations around a spheroidal cavity is discussed. Numerical results are given for a number of hexagonal crystals.

Origin of the alternate bright/dark contrast in HREM images of hexagonal crystals, particularly 6H-SiC

1993 ◽  
Vol 51 ◽  
pp. 914-915
Author(s):  
J.S. Bow ◽  
R.W. Carpenter ◽  
M.J. Kim
Keyword(s):  
High Resolution ◽  
Incident Beam ◽  
Hexagonal Crystal ◽  
Detailed Explanation ◽  
Similar Character ◽  
High Resolution Images ◽  
The Difference ◽  
Zigzag Shape ◽  
Hexagonal Crystals ◽  
Dark Contrast

A prominent characteristic of high-resolution images of 6H-SiC viewed from [110] is a zigzag shape with a period of 6 layers as shown in Fig.1. Sometimes the contrast is same through the 6 layers of (0006) planes (Fig.1a), but in most cases it appears as in Fig.1b -- alternate bright/dark contrast among every three (0006) planes. Alternate bright/dark contrast is most common for the thicker specimens. The SAD patterns of these two types of image are almost same, and there is no indication that the difference results from compositional ordering. O’Keefe et al. concluded this type of alternate contrast was due to crystal tilt in thick parts of the specimen. However, no detailed explanation was given. Images of similar character from Ti3Al, which is also a hexagonal crystal, were reported by Howe et al. Howe attributed the bright/dark contrast among alternate (0002) Ti3Al planes to phase shifts produced by incident beam tilt.

Sign in / Sign up

Export Citation Format

Share Document