| タイトル | Three dimensional finite-element analysis of finite-thickness fracture specimens |
| 本文（外部サイト） | http://hdl.handle.net/2060/19770018633 |
| 著者（英） | Newman, J. C., Jr.; Raju, I. S. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1977-05-01 |
| 言語 | eng |
| 内容記述 | The stress-intensity factors for most of the commonly used fracture specimens (center-crack tension, single and double edge-crack tension, and compact), those that have a through-the-thickness crack, were calculated using a three dimensional finite-element elastic stress analysis. Three-dimensional singularity elements were used around the crack front. The stress intensity factors along the crack front were evaluated by using a force method, developed herein, that requires no prior assumption of either plane stress or plane strain. The calculated stress-intensity factors from the present analysis were compared with those from the literature whenever possible and were generally found to be in good agreement. The stress-intensity factors at the midplane for all specimens analyzed were within 3 percent of the two dimensional plane strain values. The stress intensity factors at the specimen surfaces were considerably lower than at the midplanes. For the center-crack tension specimens with large thickness to crack-length ratios, the stress-intensity factor reached a maximum near the surface of the specimen. In all other specimens considered the maximum stress intensity occurred at the midplane. |
| NASA分類 | STRUCTURAL MECHANICS |
| レポートNO | 77N25577
NASA-TN-D-8414
L-10967 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/182110 |
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