FAILURE ANALYSIS OF TRAPEZIUM SHAPED CARBON-EPOXY PLATE PINNED-JOINT

The aim of this study is to investigate failure strength and failure mode of mechanically fastened carbon-epoxy composite plate which shape is trapezium. The failure load and mode are analyzed numerically. The numerical method includes two steps. First, the stress distribution in the plate is calculated by the use of a finite element method. Second, the failure load and the failure mode are predicted by means of Tsai-Hill and Tensilecompressive failure criterion. A computer code was developed which can be used to calculate the maximum failure load, the mode of failure and the propagation of failure. The edge, E/D, and side, W/D, distances of plate are changed from 1 to 4 and 2 to 4 respectively, while the orientation angle of plate is equal to 0°. It is found that full bearing strength is developed when the edge distance ratio is equal to 3 and side distance ratio is equal to 4.

ÝÇÝNDE PÝM BULUNAN YAMUK ÞEKÝLLÝ KARBON EPOKSÝ PLAKANIN HASAR ANALÝZÝ

Bu çalýþmanýn amacý, içinde pim bulunan yamuk þekilli, karbon-epoksi kompozitinin yýrtýlma mukavemetini ve modunu araþtýrmaktýr. Yýrtýlma yükü ve modu nümerik olarak analiz edildi. Nümerik metod iki adým içerir: ilk olarak plakadaki gerilme daðýlýmý sonlu elemanlar metodu kullanarak hesaplandý. Ýkinci olarak, yýrtýlma yükü ve modu Tsai-Hill ve Tensile-Compressive Failure kriterleri yardýmýyla bulundu. Maksimum yýrtýlma yükü, Yýrtýlma modu ve Yýrtýlma ilerlemesini bulan bir bilgisayar programý geliþtirildi. Fiber açýsý 0° olmak üzere plakanýn kenar oraný E/D ve geniþlik oraný W/D sýrayla 1 ile 4 ve 2 ile 4 oranýnda deðiþtirildi.