buckling
PAMUKKALE ÜNÝVERSÝTESÝ MÜHENDÝSLÝK
FAKÜLTESÝ P A M U K K A L E U N I VE R S I T Y
MÜHENDÝSLÝK
BÝLÝMLERÝ DERGÝSÝ J O U R N A L
ENGINEERING
OF
COLLEGE
ENGINEERING
YIL
: 1995
CÝLT : 1
SAYI : 1
SAYFA : 39-43
SCIENCES
EXPERIMENTAL INVESTIGATION OF THE PHENOMENON OF
BUCKLING FOR STEEL AND ALUMINIUM STRUTS
Durmuş TÜRKMEN
University of Pamukkale, Engineering Faculty, Denizli -TURKEY
ABSTRACT
The experiment was carried out to investigate the phenomenon of buckling using simple struts. These results were then compared with the theoretical predictions. Three steel struts of different length were used in the experiment; one of them had fix/pinned-end all the others had pin/pin-end joint. The applied load was placed at different eccentricities for each strut. Six aluminium pin-end struts of varying length were also tested. The measured critical load for each strut was compared against the corresponding Euler and Southwell predictions. For a steel strut, it would be expected that buckling would be symmetrical for left and right eccentricities. However, this was not the case due to imperfections in the struts. The struts buckled with half sine-wave and if one end of the strut was fixed the effective length was reduced and the critical load was increased. In the case of the aluminium struts, due to plastic behaviour in the deformation it was much harder to find the critical load. For steel struts both Euler and Southwell predictions were close to initial estimates of critical load.
Keywords: Experimental Investigation of Buckling, Steel and Aluminium Struts, Euler and Southwell Predictions
ÇELÝK VE ALÜMÝNYUM ÇUBUKLARDA BURKULMANIN DENEYSEL
ÝNCELENMESÝ
ÖZET
Bu çalýþmada burkulma olayý basit çubuklar kullanýlarak denendi. Elde edilen deðerler daha sonra teorik tahminlerle karþýlaþtýrýldý. Deney sýrasýnda deðiþik uzunluklarda üç çelik çubuk kullanýldý. Bunlardan birisi sabit olarak diðer ikiside hareket edebilecek þekilde
FAKÜLTESÝ P A M U K K A L E U N I VE R S I T Y
MÜHENDÝSLÝK
BÝLÝMLERÝ DERGÝSÝ J O U R N A L
ENGINEERING
OF
COLLEGE
ENGINEERING
YIL
: 1995
CÝLT : 1
SAYI : 1
SAYFA : 39-43
SCIENCES
EXPERIMENTAL INVESTIGATION OF THE PHENOMENON OF
BUCKLING FOR STEEL AND ALUMINIUM STRUTS
Durmuş TÜRKMEN
University of Pamukkale, Engineering Faculty, Denizli -TURKEY
ABSTRACT
The experiment was carried out to investigate the phenomenon of buckling using simple struts. These results were then compared with the theoretical predictions. Three steel struts of different length were used in the experiment; one of them had fix/pinned-end all the others had pin/pin-end joint. The applied load was placed at different eccentricities for each strut. Six aluminium pin-end struts of varying length were also tested. The measured critical load for each strut was compared against the corresponding Euler and Southwell predictions. For a steel strut, it would be expected that buckling would be symmetrical for left and right eccentricities. However, this was not the case due to imperfections in the struts. The struts buckled with half sine-wave and if one end of the strut was fixed the effective length was reduced and the critical load was increased. In the case of the aluminium struts, due to plastic behaviour in the deformation it was much harder to find the critical load. For steel struts both Euler and Southwell predictions were close to initial estimates of critical load.
Keywords: Experimental Investigation of Buckling, Steel and Aluminium Struts, Euler and Southwell Predictions
ÇELÝK VE ALÜMÝNYUM ÇUBUKLARDA BURKULMANIN DENEYSEL
ÝNCELENMESÝ
ÖZET
Bu çalýþmada burkulma olayý basit çubuklar kullanýlarak denendi. Elde edilen deðerler daha sonra teorik tahminlerle karþýlaþtýrýldý. Deney sýrasýnda deðiþik uzunluklarda üç çelik çubuk kullanýldý. Bunlardan birisi sabit olarak diðer ikiside hareket edebilecek þekilde
References: Allen H.G. and Bulson P. S., 'Background of buckling ', McGraw-Hill, Maidenhead, 1980. Horne M.R. and Merchant W., 'The Stability of Frames ', Pergamon, Oxford, 1965. Stability ', McGraw -hill, New York, 2nd Edition, 1961