Stress concentration around a strongly oblate cavity in a cubic crystal and its associated crack problems

✍ Scribed by Chun-Ron Chiang

• Book ID: 103828867
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 321 KB
• Volume: 77
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/j.engfracmech.2010.05.013

✦ Synopsis

The stress distribution around a strongly oblate spheroidal cavity in a cubic crystal is determined by the equivalent inclusion method. The stress concentration factor is shown to be a product of two factors: one factor is purely geometric; the other factor depends on the material properties. By allowing the aspect ratio of the cavity to approach zero, the stress intensity factor of the associated penny-shaped crack is deduced. The energy release rates of cracks on {1 0 0} planes are computed for different growth directions. Theses results are found to be correlated well with Zener's anisotropy factor.