| Titre : |
Flexural fatigue performance of glass fiber/epoxy step-wise functionally and non-functionally graded composites of different structures |
| Type de document : |
texte imprimé |
| Auteurs : |
Abdel Azeez Selmy, Auteur ; M. A. Abd El-baky, Auteur ; M. R. Ghazy, Auteur ; M. Kamel, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 298-307 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Composites à fibres de verre -- Propriétés mécaniques
Epoxydes
Fibres à orientation unidirectionnelle
Flexion (mécanique)
Matériaux -- Fatigue
Stratifiés -- Propriétés mécaniques
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Flexural fatigue performance of newly developed step-wise functionally graded (FG) composites has been investigated experimentally. Two unidirectional glass fiber (UGF)/epoxy FG composites with overall fiber volume fraction of 39.9 ± 0.3% and thickness of 6.0 ± 0.1 mm were fabricated using hand lay-up technique. The fabrication proposed technique depends on the variation of the composite structure achieved by three different templates. A non-functionally graded (NFG) composite laminate with the same overall fiber volume fraction and thickness was also fabricated using a fourth template for comparison. Each of the FG and NFG composites is made of six plies. Each ply has a thickness of 1.0 mm. This occurs by controlling the amount of matrix in each ply (constant matrix amount for all plies). Fatigue tests were performed at zero mean stress. A 20% reduction of the initial flexural stiffness was taken as a failure criterion. The S–N curves for the fabricated FG and NFG composites have been constructed as design curves. For FG composites, the effects of the spatial gradient of fiber content and plies stacking sequence on both S–N relationships and the specimens’ surface temperature rise were studied. Two-parameter Weibull distribution function was used to statistically analyze the fatigue life results. |
| Note de contenu : |
- EXPERIMENTAL WORKS : Proposed structures of functionally graded composites - Fabrication procedure of composites - Fatigue testing
- STATISTICAL ANALYSIS OF FATIGUE-LIFE-DATA : Analysis of fatigue-life data by the least-squares method (LSM) - Reliability analysis of fatigue life test results
- RESULTS AND DISCUSSION : Relationship between residual stiffness and number of cycles - Mid-length speciment surface temperature rise measurements - S.-N. curves - Statistical analysis of fatigue test results |
| DOI : |
10.3139/217.3297 |
| En ligne : |
https://drive.google.com/file/d/1MBiNmh2HXsJ5gwXnNySXAdmRn0GdEIaV/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28830 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXII, N° 3 (07/2017) . - p. 298-307
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