Characterisation of Toughened Polymers using Fracture Mechanics

Abstract

A review of the principles of fracture mechanics will be given and in particular the use of Kc and Gc to characterise the toughness of polymers. The basic method is that of linear elastic fracture mechanics (LEFM) where in order to achieve plane strain a specimen size criteria must be met. These size requirements are quite large for many toughened polymers and LEFM cannot be employed. Smaller specimens can be used if the Jc method is employed and this will be described in some detail. © 1985 IUPAC