| タイトル | Performance of a quantitative study of instability-related delamination growth |
| 本文（外部サイト） | http://hdl.handle.net/2060/19830021043 |
| 著者（英） | Ramkumar, R. L. |
| 著者所属（英） | Northrop Corp. |
| 発行日 | 1983-03-01 |
| 言語 | eng |
| 内容記述 | An experimental program was conducted to quantify instability-induced imbedded delamination growth. Static tests on double cantilever beam (DCB) specimens yielded the critical mode 1 strain energy release rate (G sub 1 C) for T300/5208 graphite/epoxy. Static tests on mixed mode cracked lap shear (CLS) specimens, and a nonlinear finite element analysis (NFEA) of the CLS specimen to separate mode 1 and mode 2 effects, yielded the critical mode 2 strain energy release rate (G sub 2 C) for T300/5208. Constant amplitude fatigue tests on DCB and CLS specimens, along with the NFEA results on CLS specimens, quantified mode 1 and mode 2 contributions to delamination growth rate. Fatigue tests were conducted at a frequency (omega) of 10 Hertz, maintaining the minimum to maximum cyclic load ratio (R) at 0.05. Static compression and constant amplitude compression fatigue tests were also conducted on specimens with imbedded through the width (ITTW) delaminations. Kapton imbeddments were located below 3, 4 or 6 plies in a 64-ply laminate, during layup, to simulate ITTW delaminations. |
| NASA分類 | COMPOSITE MATERIALS |
| レポートNO | 83N29314
NOR-83-70
NASA-CR-166046
NAS 1.26:166046 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/162117 |
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