The Fatigue and Durability Behaviour of Automotive Adhesives. Part I: Fracture Mechanics Tests

Autor:	J. K. Jethwa, Anthony J. Kinloch
Rok vydání:	1997
Předmět:	Cyclic stress Materials science Fracture mechanics Surfaces and Interfaces General Chemistry Paris' law Fatigue limit Durability Surfaces Coatings and Films Crack closure Mechanics of Materials Materials Chemistry Fracture (geology) Adhesive Composite material
Zdroj:	The Journal of Adhesion. 61:71-95
ISSN:	1545-5823 0021-8464
DOI:	10.1080/00218469708010517
Popis:	A fracture mechanics approach has been successfully used to examine the cyclic fatigue behaviour of adhesively-bonded joints, which consisted of aluminium-alloy or electro-galvanised (EG) steel substrates bonded using toughened-epoxy structural paste-adhesives. The adhesive systems are typical of those being considered for use, or in use, for bonding load-bearing components in the automobile industry. The results were plotted in the form of the rate of crack growth per cycle, da/dN, versus the maximum strain-energy release rate, Gmax , applied in the fatigue cycle, using logarithmic axes. Of particular interest was the presence of a threshold value of the strain-energy release rate, Gth , applied in the fatigue cycle, below which fatigue crack growth was not observed to occur. The cyclic fatigue tests conducted in a relatively dry environment of 23°C, and 55%; RH were shown to cause crack propagation at far lower values of Gmax compared with the value of the adhesive fracture energies, Gc , which...
Databáze:	OpenAIRE
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