An analysis of cracks emanating from a circular hole in unidirectional fiber-reinforced composites

✍ Scribed by S.S. Wang; J.F. Yau

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 956 KB
• Volume: 13
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(80)90040-5

✦ Synopsis

Ahsbnet-This paper presents an anaIyticaI study of cracks emanating from a circular hole in an off-axis unidiiectional fiber-reinforced composite. A convenient and accurate method of analysis is formulated on the basis of conservation laws of elasticity and of fundamental relationships in anisotropic fracture mechanics. The problem is eventually reduced to a system of linear algebraic equations in mixedmode stress intensity factors. Su~~o~ty of the current anaiysis to other approaches in investigating the problem with very complicated crack geometry and material anisotropy is demonstrated when used in conjunction with any numerical method such as a finite efement analysis. Mixed-mode stress intensity factors and the associated energy release rates in the crack problem are determined for the composites with various fiber orientations. Solutions for both single and double cracks emanating from the edge of a hole in the composites are presented also to ihustrate the fu~amen~ nature of the problem.