On the modelling of interfacial transition behaviour in composite materials

Edge effects connected with thin interphases in composite materials

“…One can see that this region is essentially smaller than the thickness of the interphase and can be estimated as 0:02 Á 2h. This corresponds with the results reported in [6,12,23,27]. On the other hand, the region, where the transmission conditions are no longer valid, can be estimated as being comparable with the interphase thickness.…”

“…soft, comparable and stiff). The three classifications come from the asymptotic analysis [22,23] and do not contradict or overlap with that found in [12], where, in fact, only the soft and comparable interfaces in our classification are under consideration. The edge effects seen related to the problem under consideration are divided up into three groups: edge effect, validity of transmission condition and singularity dominated zone.…”

“…Such transmission conditions can be obtained from some phenomenological assumptions (cf. [8,10,30]) or from the accurate asymptotic analysis [3,12,15,16,22,23] taking into account various features of the intermediate layer.…”

“…However, to the best knowledge of the authors, only the very first attempts (in the papers [11,12,23]) have been made to estimate the influence of such imperfect modelling on the edge effects seen within composite structure.…”

Modelling of interlaminar fracture processes in composites using interface elements

“…Several methods have been proposed in the literature [13,[16][17][18][19][20]. Some authors [13] suggest the use of tensile testing on a oriented film of pure resin, associating its behaviour to that of a single fibril in the craze zone ahead of the crack tip; others make use of the full-notch tensile (FNCT) testing configuration to obtain plane-strain loading conditions at the crack tip and force a craze to develop [21,22].…”