دورية أكاديمية
Effect of Location of Delamination on Free Vibration of Cross-Ply Conical Shells
| العنوان: | Effect of Location of Delamination on Free Vibration of Cross-Ply Conical Shells |
|---|---|
| المؤلفون: | Sudip Dey, Amit Karmakar |
| المصدر: | Shock and Vibration, Vol 19, Iss 4, Pp 679-692 (2012) |
| بيانات النشر: | Wiley, 2012. |
| سنة النشر: | 2012 |
| المجموعة: | LCC:Physics |
| مصطلحات موضوعية: | Physics, QC1-999 |
| الوصف: | Location of delamination is a triggering parameter for structural instability of laminated composites. In this paper, a finite element method is employed to determine the effects of location of delamination on free vibration characteristics of graphite-epoxy cross-ply composite pre-twisted shallow conical shells. The generalized dynamic equilibrium equation is derived from Lagrange's equation of motion neglecting Coriolis effect for moderate rotational speeds. The formulation is exercised by using an eight noded isoparametric plate bending element based on Mindlin's theory. Multi-point constraint algorithm is utilized to ensure the compatibility of deformation and equilibrium of resultant forces and moments at the delamination crack front. The standard eigen value problem is solved by applying the QR iteration algorithm. Finite element codes are developed to obtain the numerical results concerning the effects of location of delamination, twist angle and rotational speed on the natural frequencies of cross-ply composite shallow conical shells. The mode shapes are also depicted for a typical laminate configuration. Numerical results obtained from parametric studies of both symmetric and anti-symmetric cross-ply laminates are the first known non-dimensional natural frequencies for the type of analyses carried out here. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1070-9622 1875-9203 |
| Relation: | https://doaj.org/toc/1070-9622; https://doaj.org/toc/1875-9203 |
| DOI: | 10.3233/SAV-2011-0659 |
| URL الوصول: | https://doaj.org/article/9a843759715e4e49a6995d9c90d180d8 |
| رقم الأكسشن: | edsdoj.9a843759715e4e49a6995d9c90d180d8 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 10709622 18759203 |
|---|---|
| DOI: | 10.3233/SAV-2011-0659 |