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Stress analysis of clamped-free grid composite cylindrical shell under various end loadings

Journal of Central South University 2014年第7期21卷 2667-2672页

作者： ARASHMEHR JAFAR rahimi gholamhossein RASOULI FAZEL Mechanical Engineering Department Tarbiat Modares University

Stress analysis of cylindrical grid-stiffened composite shells was conducted under transverse loading,pure bending,torsion and axial compression under clamped-free boundary *** strain gauges were employed to measure the strains in transverse loading case to validate the finite element analysis which was conducted using ANSYS *** agreement was obtained between the two *** was observed that stiffening the composite shell with helical ribs decreased the average equivalent Von Mises stress on the *** reduction of the stress seemed to be higher in the intersection of two *** was also seen that the stress reduction ratio was higher when the structure was under bending compared to torsion and axial *** reduction ratio was approximately 75% in pure bending in the intersection point of the ribs,while it was approximately 25% in ***,it is concluded that the presence of the ribs is more effective under *** analysis was done using Tsai-Wu *** ribs were observed to result in maximum and minimum increase in the failure load of the structure under transverse bending and torsional loading,respectively.

关键词： stiffened composite shell end loading stress analysis failure load

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