| タイトル | Resistance Curves in the Tensile and Compressive Longitudinal Failure of Composites |
| 本文（外部サイト） | http://hdl.handle.net/2060/20100012825 |
| 著者（英） | Catalanotti, Giuseppe; Xavier, Jose C.; Camanho, Pedro P.; Lopes, Claudio S.; Davila, Carlos G.; Bessa, Miguel A. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 2010-03-17 |
| 言語 | eng |
| 内容記述 | This paper presents a new methodology to measure the crack resistance curves associated with fiber-dominated failure modes in polymer-matrix composites. These crack resistance curves not only characterize the fracture toughness of the material, but are also the basis for the identification of the parameters of the softening laws used in the analytical and numerical simulation of fracture in composite materials. The method proposed is based on the identification of the crack tip location by the use of Digital Image Correlation and the calculation of the J-integral directly from the test data using a simple expression derived for cross-ply composite laminates. It is shown that the results obtained using the proposed methodology yield crack resistance curves similar to those obtained using FEM-based methods in compact tension carbon-epoxy specimens. However, it is also shown that the Digital Image Correlation based technique can be used to extract crack resistance curves in compact compression tests for which FEM-based techniques are inadequate. |
| NASA分類 | Composite Materials |
| レポートNO | NF1676L-9548 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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