Abstract
Different methods of closure measurement and issues related to the identification of closure points are examined. Based on compliance curves obtained from crack mouth clip gauges and near-tip strain gauges, a systematic assessment of closure measurements has been made by a variety of non-subjective methods. Closure results obtained from compliance curves are also compared with direct crack tip observations. For results obtained on a commercial Al alloy, AA2024-T351 plate, it is shown that curve fitting methods based on a combination of linear and quadratic functions provide particularly sensitive and consistent closure measurements. The potential separation of plane stress and plane strain closure effects that arise in real, three-dimensional specimens is demonstrated via a combination of global compliance measurements and the use of side-grooved specimens.
| Original language | English |
|---|---|
| Pages (from-to) | 114-125 |
| Number of pages | 12 |
| Journal | Materials Science and Engineering A |
| Volume | 284 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 1 Jan 2000 |
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