The mixed mode fracture of unidirectional fibrous composites

✍ Scribed by Jehuda Tirosh

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 688 KB
• Volume: 13
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(80)90047-8

✦ Synopsis

With explicit restriction, the energy release rate principle in homogeneous anisotropic bodies is used to predict fracture strength of cracked unidirectional fibrous composite in mixed mode I and mode II loading. The range to which such prediction is valid in terms of the loading parameters (K I and K2) is shown to depend on a certain ratio between the stress transverse to fibers to that along the fibers, in the vicinity of the crack tip. Some experimental data on oriented notches confirm the suggested approach and its range of validity reasonably well. A very good agreement with the strain energy density concept ('3" theory) is demonstrated on variety of composite materials. The operational simplicity of the energy release rate criterion is thus emerged.