A new jig for mode II interlaminar fracture testing of composite materials under quasi-static and moderately high rates of loading

Caimmi, Francesco; Frassine, R.; Pavan, A.

doi:10.1016/j.engfracmech.2006.05.002

Cited by 5 publications

(1 citation statement)

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“…In related work, LEFM techniques have also been used to investigate the effects of rate on the mode-II fracture of composite structures (Jacob et al 2005). It is noted that no unambiguous relationship between rate and the mode-II toughness resulted from these studies, with different studies showing either increases, decreases or no effect of rate on toughness (Caimmi et al 2006;Giambanco and Scimemi 2006;Liechti and Wu 2001).…”

Section: Introductionmentioning

confidence: 97%

Rate effects in mode-II fracture of plastically deforming, adhesively bonded structures

et al. 2009

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Results from a combined experimental and numerical investigation into the effects of rate on mode-II fracture of a plastically deforming, adhesively bonded joint are presented. It is shown that a cohesive-zone model has to be modified to include coupling between normal and shear modes of deformation when there is extensive shear deformation of the adhesive layer. A suitable cohesive-zone modeling strategy is described, and the mode-II cohesive parameters determined from the model are presented as a function of loading rate. Previous studies of the same system showed that the effects of rate in mode-I were limited to the probability that a crack growing in a toughened quasi-static mode would spontaneously make a transition to a brittle mode of fracture. No such transitions were found for mode-II fracture. Crack growth always occurred in a quasi-static fashion. While there was some evidence that rate might affect the mode-II fracture parameters, these effects were very limited even up to crack velocities of about 1,000 mm/s. Any possible effects was limited to a very minor increase in toughness and strength with increased loading rates. However, the magnitude of these possible increases were comparable to the magnitude of the uncertainties in the measured values.

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