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Characterization of mode 1 and mixed-mode failure of adhesive bonds between composite adherends
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Johnson, W. S. Mall, S. |
| Copyright Year | 1985 |
| Description | A combined experimental and analytical investigation of an adhesively bonded composite joint was conducted to characterize both the static and fatigue beyond growth mechanism under mode 1 and mixed-mode 1 and 2 loadings. Two bonded systems were studied: graphite/epoxy adherends bonded with EC 3445 and FM-300 adhesives. For each bonded system, two specimen types were tested: a double-cantilever-beam specimen for mode 1 loading and a cracked-lapshear specimen for mixed-mode 1 and 2 loading. In all specimens tested, failure occurred in the form of debond growth. Debonding always occurred in a cohesive manner with EC 3445 adhesive. The FM-300 adhesive debonded in a cohesive manner under mixed-mode 1 and 2 loading, but in a cohesive, adhesive, or combined cohesive and adhesive manner under mode 1 loading. Total strain-energy release rate appeared to be the driving parameter for debond growth under static and fatigue loadings. |
| File Size | 2021227 |
| Page Count | 32 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850012960 |
| Archival Resource Key | ark:/13960/t8sb8zj9q |
| Language | English |
| Publisher Date | 1985-02-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Fracture Mechanics Joints Junctions Strain Energy Release Rate Failure Modes Cyclic Loads Adhesive Bonding Cantilever Beams Static Loads Specimen Geometry Fatigue Tests Strain Energy Methods Graphite-epoxy Composites Composite Structures Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
