| Autor: |
Robert J. Young, Salim Yamini, R.A. Gledhill, Anthony J. Kinloch |
| Rok vydání: |
1978 |
| Předmět: |
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| Zdroj: |
Polymer. 19:574-582 |
| ISSN: |
0032-3861 |
| DOI: |
10.1016/0032-3861(78)90285-9 |
| Popis: |
Crack propagation in a series of amine-cured epoxy resin adhesives in both the bulk material and adhesive joints has been studied as a function of the formulation of the resins and the conditions of testing using a linear elastic fracture mechanics approach. In both cases propagation was found to take place in either a stick—slip (unstable) or a continuous (stable) manner; the particular type of propagation depending upon the amount and type of hardener used and the temperature and rate of testing. A constant crack opening displacement (δ) has been shown to be a unique failure criterion for continuous propagation with δ having approximately the same value in both bulk material and joints. However δ was found to increase in the stick—slip mode of propagation. These crack propagation characteristics have been related to the compressive yield behaviour of each material as determined by uniaxial compression tests performed on the epoxy resins. Possible mechanisms of crack propagation have also been discussed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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