Cohesive law and notch sensitivity of adhesive joints

Cohesive law and notch sensitivity of adhesive joints

A large non-linear zone develops during fracture of a polyurethane adhesive bonded to steel adherends. The fracture process zone was characterised by a traction-separation law, a so-called cohesive law. The cohesive law was determined experimentally by the use of a J integral based approach on doubl...

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Veröffentlicht in:Acta materialia 2002-03, Vol.50 (5), p.1053-1061
1. Verfasser: Sorensen, B F
Format: Artikel
Sprache:eng
Schlagworte:
Bonding
Condensed matter: structure, mechanical and thermal properties
Crack velocity
Exact sciences and technology
Fatigue, brittleness, fracture, and cracks
Fracture & fracture toughness
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
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description A large non-linear zone develops during fracture of a polyurethane adhesive bonded to steel adherends. The fracture process zone was characterised by a traction-separation law, a so-called cohesive law. The cohesive law was determined experimentally by the use of a J integral based approach on double cantilever beam sandwich specimens loaded with pure bending moments. The cohesive law shape was found to be highly non-linear. The cohesive stress increased with increasing separation, reached a peak and then decreased with increasing opening. The effects of loading rate and thickness of the adhesive layer on the cohesive law were investigated. An excellent agreement was found between measured strengths of bonded panels having a central notch and strength predictions based on cohesive law parameters.
doi_str_mv 10.1016/S1359-6454(01)00404-9
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subjects Bonding
Condensed matter: structure, mechanical and thermal properties
Crack velocity
Exact sciences and technology
Fatigue, brittleness, fracture, and cracks
Fracture & fracture toughness
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
title Cohesive law and notch sensitivity of adhesive joints
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