| タイトル | Comparisons of various configurations of the edge delamination test for interlaminar fracture toughness |
| 本文（外部サイト） | http://hdl.handle.net/2060/19850023838 |
| 著者（英） | Obrien, T. K.; Morris, D. H.; Raju, I. S.; Simonds, R. A.; Johnston, N. J. |
| 著者所属（英） | NASA Langley Research Center|Army Research and Technology Labs. |
| 発行日 | 1985-07-01 |
| 言語 | eng |
| 内容記述 | Various configurations of Edge Delamination Tension (EDT) test specimens, of both brittle (T300/5208) and toughened-matrix (T300/BP907) graphite reinforced composite laminates, were manufactured and tested. The mixed-mode interlaminar fracture toughness, G sub C, was measured using (30/30 sub 2/30/90 sub N)sub s, n=1 or 2, (35/-35/0/90) sub s and (35/0/-35/90) sub s layups designed to delaminate at low tensile strains. Laminates were made without inserts so that delaminations would form naturally between the central 90 deg plies and the adjacent angle plies. Laminates were also made with Teflon inserts implanted between the 90 deg plies and the adjacent angle (theta) plies at the straight edge to obtain a planar fracture surface. In addition, interlaminar tension fracture toughness, GIc, was measured from laminates with the same layup but with inserts in the midplane, between the central 90 deg plies, at the straight edge. All of the EDT configurations were useful for ranking the delamination resistance of composites with different matrix resins. Furthermore, the variety of layups and configurations available yield interlaminar fracture toughness measurements needed to generate delamination failure criteria. The influence of insert thickness and location, and coupon size on G sub c values were evaluated. |
| NASA分類 | COMPOSITE MATERIALS |
| レポートNO | 85N32151
NASA-TM-86433
NAS 1.15:86433
USAAVSCOM-TM-85-B-3
AD-A160583 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/155869 |
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