THE EFFECT OF GEOMETRICAL IMPERFECTION ON THE AXIAL BUCKLING OF UNSTIFFENED AND STIFFENED COMPOSITE CYLINDERS WITH AND WITHOUT CUTOUT

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TALEZADEHLARI ALI; RAHIMI GHOLAM HOSSEIN

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Journal: Modares Mechanical Engineering Year:2017 | Volume:17 | Issue:7 Page(s): 245-256

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Title

THE EFFECT OF GEOMETRICAL IMPERFECTION ON THE AXIAL BUCKLING OF UNSTIFFENED AND STIFFENED COMPOSITE CYLINDERS WITH AND WITHOUT CUTOUT

Author(s)

TALEZADEHLARI ALI | RAHIMI GHOLAM HOSSEIN | Issue Writer Certificate

Keywords

GEOMETRICAL IMPERFECTIONQ1

STIFFENED COMPOSITE CYLINDERQ1

OPENINGQ3

EXPERIMENTAL STUDYQ2

NUMERICAL ANALYSISQ2

Abstract

Although many researchers investigated the effect of GEOMETRICAL IMPERFECTION on the buckling load of unstiffened shells, the stiffened shells have not been studied yet. In this paper, the effects of GEOMETRICAL IMPERFECTION the buckling load of unstiffened and stiffened composite shell with and without cutout are investigated. For this goal, several specimens are manufactured and tested. The mechanical properties of fibers and resin matrix and volume fraction of fibers in the shell and the stiffeners are determined based on the standard tests. Finally, the mechanical properties of each component are calculated by micromechanical relations. These properties are used for finite element modeling by ABAQUS package. Linear eigenvalue analysis and nonlinear RIKS method -which can consider the GEOMETRICAL IMPERFECTION- are used. FE results are validated in comparison with experimental tests. Using FE model, the effects of imperfection amplitude on the buckling behavior of unstiffened and stiffened shell with and without cutout are studied. The results show that GEOMETRICAL IMPERFECTIONs have more effect on the buckling load of unstiffened shells in comparison with stiffened ones. Nevertheless, ignoring these imperfections and using eigenvalue analysis overestimates the buckling load. This fact is further evidence for shells without an OPENING. In perforated shells, the cutout itself represents an imperfection that is much more significant than geometric imperfections.

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APA: Copy

TALEZADEHLARI, ALI, & RAHIMI, GHOLAM HOSSEIN. (2017). THE EFFECT OF GEOMETRICAL IMPERFECTION ON THE AXIAL BUCKLING OF UNSTIFFENED AND STIFFENED COMPOSITE CYLINDERS WITH AND WITHOUT CUTOUT. MODARES MECHANICAL ENGINEERING, 17(7 ), 245-256. SID. https://sid.ir/paper/179345/en

Vancouver: Copy

TALEZADEHLARI ALI, RAHIMI GHOLAM HOSSEIN. THE EFFECT OF GEOMETRICAL IMPERFECTION ON THE AXIAL BUCKLING OF UNSTIFFENED AND STIFFENED COMPOSITE CYLINDERS WITH AND WITHOUT CUTOUT. MODARES MECHANICAL ENGINEERING[Internet]. 2017;17(7 ):245-256. Available from: https://sid.ir/paper/179345/en

IEEE: Copy

ALI TALEZADEHLARI, and GHOLAM HOSSEIN RAHIMI, “THE EFFECT OF GEOMETRICAL IMPERFECTION ON THE AXIAL BUCKLING OF UNSTIFFENED AND STIFFENED COMPOSITE CYLINDERS WITH AND WITHOUT CUTOUT,” MODARES MECHANICAL ENGINEERING, vol. 17, no. 7 , pp. 245–256, 2017, [Online]. Available: https://sid.ir/paper/179345/en

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