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      저자 : Mahmoud Shariati (검색결과 2 건)
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      • KCI등재

        Buckling of Steel Cylindrical Shells with an Elliptical Cutout

        Mahmoud Shariati,Masoud Mahdizadeh Rokhi 한국강구조학회 2010 International Journal of Steel Structures Vol.10 No.2

        Numerical simulation and analysis of steel cylindrical shells with various diameter and length having an elliptical cutout,subjected to axial compression were systematically carried out in this paper. The investigation examined the influence of the cutout size, cutout angle and the shell aspect ratios L/D and D/t on the pre-buckling, buckling, and post-buckling responses of the cylindrical shells. For several specimens, an experimental investigation was also carried out via an INSTRON 8802 servo hydraulic machine and the results obtained from the experiments were compared with numerical results. A very good accordance was observed between the results obtained from the finite element simulation and the experiments. Furthermore,some equations in the form of a buckling load reduction factor were developed.

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        Experimental Study of SS304L Cylindrical Shell With/Without Cutout Under Cyclic Combined and Uniaxial Loading

        Kamal Kolasangiani,Mahmoud Shariati 한국강구조학회 2017 International Journal of Steel Structures Vol.17 No.2

        In this research, ratcheting behavior of SS304L cylindrical shells under cyclic combined and uniaxial loadings was studied. Experimental tests were carried outby a servo-hydraulic INSTRON 8802 machine and the shells were fixed normal and oblique at angle of 20° with respect to the longitudinal direction of the shell. Force-control loadings were applied and the effect of length, angle of cylindrical shell and loading history on ratcheting behavior were examined.It was shown as the angle of cylindrical shell increases, due to increase of bending moment, accumulation of plastic deformation increases.Also, linear relation was observed between plastic energy and rate of plastic deformation which shows the rigidity of fixtures used in tests. Cutout effect on cylindrical shells under these kinds of loading has been studied and it was observed that creating cutout increases the plastic deformation and its rate.

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