Mixed Experimental‐Structural Model for Interlaminar Shear Fracture Toughness
| Autor: | Dianne M. Granata, William E. Bachrach, Zbigniew S. Habas, Thomas R. Hicks |
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| Rok vydání: | 1991 |
| Předmět: |
Materials science
Critical load business.industry Mechanical Engineering Aerospace Engineering Structural engineering Castigliano's method Cracking Interlaminar shear Brittleness Fracture toughness Flexural strength General Materials Science Composite material business Material properties Civil and Structural Engineering |
| Zdroj: | Journal of Aerospace Engineering. 4:108-125 |
| ISSN: | 1943-5525 0893-1321 |
| DOI: | 10.1061/(asce)0893-1321(1991)4:1(108) |
| Popis: | For brittle composite materials, a mixed experimental and structural model is developed to determine a consistent interlaminar shear fracture toughness (GIIc) in an end notched flexure (ENF) test. The ENF procedure presented here differs from the customary ENF test in that one specimen is used for multiple measurements of compliances and the corresponding critical loads and crack growths; this procedure reduces the number of specimens needed to determine GIIc. Using this test procedure, GIIc is difficult to compute from only the experimental results because the critical load is sensitive to the inhomogeneity of the material and the specimen variation; thus a model that integrates the experimental results with structural beam theory is developed. Using the experimental results, a functional relationship between the critical load and the important geometric and material properties is obtained. A structural model is developed from Castigliano's second theorem to compute the flexural and transverse shear defl... |
| Databáze: | OpenAIRE |
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