On the Use of a Driven Wedge Test to Acquire Dynamic Fracture Energies of Bonded Beam Specimens
| Autor: | J. Michael Starbuck, Rakesh K. Kapania, David A. Dillard, David J. Pohlit, George C. Jacob |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Fracture zone Surfaces and Interfaces General Chemistry Epoxy Slip (materials science) Composite laminates Kinetic energy Crosshead Finite element method Surfaces Coatings and Films Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium Adhesive Composite material |
| Zdroj: | The Journal of Adhesion. 87:395-423 |
| ISSN: | 1545-5823 0021-8464 |
| DOI: | 10.1080/00218464.2011.562125 |
| Popis: | A driven wedge test is used to characterize the mode I fracture resistance of adhesively bonded composite beam specimens over a range of crosshead rates up to 1 m/s. The shorter moment arms (between wedge contact and crack tip) significantly reduce inertial effects and stored energy in the debonded adherends, when compared with conventional means of testing double cantilever beam (DCB) specimens. This permitted collecting an order of magnitude more crack initiation events per specimen than could be obtained with end-loaded DCB specimens bonded with an epoxy exhibiting significant stick-slip behavior. The localized contact of the wedge with the adherends limits the amount of both elastic and kinetic energy, significantly reduces crack advance during slip events, and facilitates higher resolution imaging of the fracture zone with high speed imaging. The method appears to work well under both quasi-static and high rate loading, consistently providing substantially more discrete fracture events for specimens ... |
| Databáze: | OpenAIRE |
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