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Mixed mode fracture analysis and toughness of adhesive joints

✍ Scribed by H.L.J. Pang

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 407 KB
Volume: 51
Category: Article
ISSN: 0013-7944
DOI: 10.1016/0013-7944(94)00310-e

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✦ Synopsis

Abstraet--A Compact Mixed Mode (CMM) fracture specimen was developed for fracture toughness determination. It is capable of determining the complete range of fracture toughness under pure mode I, pure mode II and mixed mode I and II loading conditions. Finite element analysis was conducted to provide calibration factors for the stress intensity factor solution for the Compact Mixed Mode (CMM) specimen. The finite element result, provided empirical correction factors fll for the pure mode I case and flix for the pure mode II case which intrinsically take account of the substrate-to-adhesive mechanical properties of the test specimen. A range of pure mode I, pure mode II and combinations of mode I and II fracture load cases were investigated using the Compact Mixed Mode (CMM) fracture specimen. With the test results, a failure assessment diagram for mixed mode fracture toughness was proposed and compared to theoretical concepts of mixed mode fracture criteria.

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