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    The effect of stacking sequence of carbon epoxy composite laminates on pinned-joint strength
    (Elsevier Sci Ltd, 2003) Aktaş, A.; Dirikolu, M.H.
    In this paper, an experimental study regarding the determination of the safe as well as the maximum bearing strengths of a pinned-joint carbon epoxy composite laminate with [0degrees/45degrees/-45degrees/90degrees]s and [90degrees/45degrees/-45degrees/0degrees]s stacking sequences is presented. The experiments are carried out according to the ASTM D953 standard. The ratio of the distance from the pin centre to the top edge to the pin diameter (E/D), and the ratio of the specimen width to the pin diameter (W/D) were systematically varied during experiments. The [90degrees/45degrees/-45degrees/Odegrees]s orientation is found to be stronger when compared to [0degrees/45degrees/-45degrees/90]s by up to 12% and 20% in terms of the safe and maximum bearing strengths, respectively. Additionally, for E/D greater than or equal to 4 and W/D greater than or equal to 4, both configurations reach their upper limit safe and maximum bearing strengths. (C) 2003 Elsevier Ltd. All rights reserved.
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    An investigation of the effects of shear on the deflection of an orthotropic cantilever beam by them use of anisotropic elasticity theory
    (Elsevier Sci Ltd, 2001) Kılıc, O.; Aktaş, A.; Dırıkolu, M.H.
    Two deflection functions due to both flexure and shear of an orthotropic cantilever beam subjected to both point and distributed loads have been obtained by the use of anisotropic elasticity theory. The deflections at the free end of the beam are calculated in order to see the effect of shear by using the obtained functions for different materials and fiber directions. In particular, when the cross-sectional height to beam-length ratio is equal to or greater than 0.25 or when the fiber directions are 0 and 90 degrees, the results show that ignoring shear effects causes significant error level in the deflections. (C) 2001 Elsevier Science Ltd. All rights reserved.