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Fracture toughness of short fibre composites in modes II and III

โœ Scribed by B.D. Agarwall; G.S. Giare

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
596 KB
Volume
15
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

Fracture toughness tests in shear modes (modes II and III) have been performed on short glass fibre composites through the use of special fixtures designed for the purpose. Calibration factors for modes II and III have been obtained. Analysis of the results has been carried out by modelling the damage growth at the crack tip as a self similar crack extension through a compliance matching procedure. The crack growth resistance at instability and the corresponding critical strain energy release rate are independent of initial crack length in the range of crack length investigated. The critical strain energy release rate in mode II is less than half of that in mode I or mode III indicating that in the case of fibrous composites, the fracture toughness tests in mode II may be more important than the tests in modes I and III.

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