Evaluation of the plastic zone at the crack tip of strain hardening low density polyethylene

From a comparison of tensile properties of two epoxy networks crosslinked, respectively, with an aromatic diamine or an anhydride and from the available literature data on the fracture properties of thermosets, it has been tried to establish structure-property relationships in this field. Attention was focused on possible specific aspects of the crosslinked polymers. Surprisingly, the crosslink density does not seem to play a crucial direct role in fracture. In contrast, there is a relation between toughness and T,: aliphatic networks of low T, are generally tougher than aromatic ones. The local mobility plays a very important role because it partly controls the value of Poisson's ratio (which determines the relative importance of dilatant stresses and shear stresses responsible, respectively, for brittle rupture and yielding) and, presumably, the activation volume of yielding (which partly determines the broadness of the temperature interval of ductility).

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Three-dimensional finite element analysis of single-edge cracked low density polyethylene

Wang

Katagiri

Nakanishi

et al. 1992

Polymer

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Evaluation of the plastic zone at the crack tip of strain hardening low density polyethylene

Cited by 4 publications

References 8 publications

Fracture characterization of low-density polyethylenes by the essential work of fracture: Changes induced by thermal treatments and testing temperature

Fracture characterization of low-density polyethylenes by the essential work of fracture: Changes induced by thermal treatments and testing temperature

Yielding and fracture in crosslinked epoxies

Three-dimensional finite element analysis of single-edge cracked low density polyethylene

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