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A STUDY OF SUPERIMPOSED FRACTURE MODES I, II AND III ON PMMA
Author(s) -
Davenport J. C. W.,
Smith D. J.
Publication year - 1993
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1993.tb00082.x
Subject(s) - materials science , composite material , fracture toughness , brittleness , finite element method , shear (geology) , ultimate tensile strength , torsion (gastropod) , stress intensity factor , tensile testing , fracture (geology) , deformation (meteorology) , linear elasticity , mixed mode , structural engineering , fracture mechanics , engineering , medicine , surgery
A test apparatus has been developed to study the fracture behaviour of engineering materials subjected to superimposed tensile and shear (Mode I and II) loads using a single edge notch specimen. Stress intensity factors were calculated using finite element analysis. Test results for PMMA are reported. Results from circumferentially notched round bar specimens, subjected to combined tension and torsion (Mode I and III) loading are also reported. The Mode I/II results are consistent with the mixed mode fracture response of a wide range of brittle materials, although there is some evidence of non‐linear behaviour. The fracture behaviour for superimposed Modes I and III indicates the strong influence of non‐linear deformation which causes the mixed mode toughness to be dependent on the sequence and type of loading.