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    Sensitivities of Two-Dimensional Fracture Problems to the Near-tip Mesh Parameters
    (Springer, 2012) Sulu, Ismail Y.; Ayhan, Ali O.
    Using the displacement correlation technique, near-tip mesh-parameter sensitivity studies are performed for cracks that cover most basic two-dimensional load-controlled problems. Stress intensity factors computed from two different mesh models for different settings of mesh parameters are compared with other solutions. The corresponding sensitivity graphs are plotted to visually see the parameters which affect results the most. Conclusions are drawn and settings of mesh parameter values are recommended.
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    Yielding of two-layer curved bars under pure bending
    (Wiley-V C H Verlag Gmbh, 2014) Arslan, Eray; Sulu, Ismail Y.
    Yielding of a curved bar consisting of two layers subject to pure bending is investigated. It is assumed that both layers of the bar are in a state of plane stress and Tresca's yield criterion is used to detect onset of plasticization. Analytical expressions are obtained for the bending moments corresponding to the elastic limit leading to plastic flow. The results show that, depending on material properties and dimensions of the layers, different cases for plastic deformation may occur. Yielding may emerge at the inner or outer surface of the bar or at the interface between two layers. Furthermore, a critical case in which yielding commences at the outer and interface surfaces simultaneously was observed. Numerical results for real engineering materials are presented in graphical form. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim