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DİK KATLI TABAKALANMIŞ DAİRESEL DELİKLİ KOMPOZİT LEVHALARDA MEKANİK VE TERMAL BURKULMA ANALİZİ

MECHANICAL AND THERMAL BUCKLING OF CROS-PLAY LAMINATED COMPOSITE PLATES WITH HOLES

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Abstract (2. Language): 
In this study mechanical and thermal buckling behaviours of the composite square plates consist of (0/90 o )x2 coss-ply and symmetric four laminates with circular holes are examined. Ansys finite element packed program is used for numeric solution. First critical buckling loads of an isotropic plate without hole subjected to unidirectional compression are found. It is seen that obtained results are appropriate to those of Timoshenko due to the plate thickness according to an approach of 1.02- 12.63%. Then constraint conditions have been taken as simple and clamped so as to make solutions for the various materials, in the thickness ratios of h/b=0.01, 0.02, 0.03, 0.04, 0.05 and hole parameter for circle holes d/b=0.1, 0.2, 0.3, 0.4, 0.5; loading ratios N2/N1=0, 1. Mechanical buckling and thermal buckling behaviours of the plates made of various materials are examined and critical buckling load and critical temperatures are determined. Values have been given in the graps and discussions are presented in the conclusion.
Abstract (Original Language): 
Bu çalışmada (0/90 0 )x2 çapraz (dik) katlı simetrik 4 tabakadan meydana gelmiş delikli kompozit kare levhaların mekanik ve termal burkulma davranışları incelenmiştir. Delik tipi daire olarak ele alınmıştır. Çözüm tekniği olarak sonlu elemanlar metodu, nümerik çözümlerin elde edilmesinde ANSYS sonlu elemanlar paket programı kullanılmıştır. Önce tek yönde basmaya maruz izotropik deliksiz bir levhanın kritik burkulma yükleri bulunmuş, sonuçların Timoshenko’nun analitik sonuçlarıyla levha kalınlığına bağlı olarak %1.02-12.63 gibi bir yaklaşıklıkla uyum sağladığı görülmüştür. Daha sonra değişik malzemelerin h/b=0.01, 0.02, 0.03, 0.04, 0.05 kalınlık oranlarında ve delik parametreleri d/b=0.1, 0.2, 0.3, 0.4, 0.5; yükleme oranları N2/N1=0, 1; mesnet şartları da basit mesnet ve ankastre mesnet olarak alınıp kritik burkulma yükleri ve kritik burkulma sıcaklıkları tespit edilmiştir. Bulunan değerler grafikler halinde verilerek gerekli değerlendirmeler yapılmıştır.

REFERENCES

References: 

ANSYSTM Swanson Analysis System Inc. “The General Purposed Finite Element Software
Ver.5.4 Users Manual Vol. I, II, III, IV.”
Lin C. H., Kuo C. S. (1989): “Buckling of Laminated Plates with Holes”, J. of Composite
Material, Vol. 23, pp. 536-553.
Mathew T. C., Singh G., Rao G. V. (1992): “Thermal Buckling of Cross-ply Composite
Laminates”, Computers and Structures, Vol. 42, No.2, pp. 281-287.
Noor A. K., Burton W. S. (1991): “Predictor-Corrector Procedures for Thermal Buckling
Analysis of Multilayered Composites Plates”, J. of Computers and Structures, Vol.40, No.
5, pp. 1071-1084.
Popov E. P. (1976): "Mukavemet (Katı cisimlerin Mekaniğine Giriş)”, Çev. H. Demiray,
Çağlayan Kitabevi, İstanbul.
Raju K., Kanaka, Naidu N. Rajasekhara, Rao G. Venkateswara (1996): “Thermal Buckling of
Circular Plates With Localized Axisysmmetric Damages”, Computers and Structures, Vol.
60, No. 6, pp. 1105-1109.
Ritchie D., Rodes, J. (1975): “Buckling and Post-buckling Behaviour of Plate With Holes”,
Aeronaut Quarterly, Vol. 26, pp. 281-296.
Schlack A. L. (1964): “Elastic Stability of Pierced Plates”, Proc. of the Society of Exp. Stress
Analysis, Vol. 21, pp. 167-172.
Thing J., Wang S., Biggers S. B., Dickson J. N. (1983): “Buckling of Composite Plates with a
FreeEdge in Edgewise Bending and Compression”, Journal of AIAA, Vol. 22, pp. 394-
398.
Tung T. K., Surdenas J. (1987): “Bucling of Rectangular Orthotropic Plates under Biaxial
Loading”, J. of Composite Material, Vol. 21, pp. 124-128.
VanDen Brink D. J., Kamat M. P. (1985): “Post-buckling Response of Isotropic and
Laminated Composites Square Plates with Circular Holes”, In. Proc. Int. Conf. Composite
Material, San Diego, California, pp. 1393-1409.
Whitney J. M., Pogano N. J. (1970): “Shear Deformation in Heterogenous Anizotropic
Plates”, J. of Aplied Mechanics, pp. 1031-1036.
Yettram A., Brawn C. J. (1986): “The Elastic Stability of Square Perforated Plates under
Biaxial Loadings”, Computers and Structures, Vol. 22(4), pp. 589-594.

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