| タイトル | Interlaminar G(IIc) evaluation of toughened-resin matrix composites using the end-notched flexure test |
| 著者（英） | Obrien, T. K.; Murri, G. B. |
| 著者所属（英） | NASA Langley Research Center|Army Aviation Research and Development Command |
| 発行日 | 1985-01-01 |
| 言語 | eng |
| 内容記述 | The usefulness of the end-notched flexure (ENF) test for measuring G(IIc) for toughened composites was evaluated. Calculations were made using the measured flexural compliance from the ENF test and the measured axial modulus. Tests were conducted on three different composite materials, using laminates with two different span lengths and insert sizes. The error associated with neglecting nonlinear terms in the displacement-curvature relationship was analyzed to demonstrate the influence of specimen geometry on G(IIc) measurement. It is concluded that G(IIc) measurement may vary with the method of calculation, span length, or insert thickness, but these effects are minor compared to the large differences in measurements obtained for different materials. Hence, the ENF test is a valid one for screening materials for improvements in interlaminar shear fracture toughness. |
| NASA分類 | COMPOSITE MATERIALS |
| レポートNO | 85A30247
AIAA PAPER 85-0647 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/392091 |
