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Item Stress Analysis of a Member of Jacket Structure with Different Types of Stiffeners(Springer, 2024) Sreejith, T.S.; Kaliveeran, V.Jacket structures are subjected to very challenging environmental conditions and thus require certain reinforcements to ensure the resistance against the challenging conditions. The present study deals with the stress analysis of a member of a jacket structure with triangular type stiffener and another with second order curved stiffener. The specimen considered is of steel with dimensions 800 mm × 100 mm × 10 mm. The member is considered as a fixed bar subjected to a concentrated load of 500 N at the mid-span. The idea is to reinforce the member to strengthen up which in turn increases the life of the structure. The configuration of the stiffeners is such that the stress concentration is avoided. The triangular stiffener has a length of 200 mm and height of 20 mm and thickness of 10 mm. The second order curved stiffener has the same length, height and thickness and follows the variation y=20-x5+x22000. Four stiffeners are provided, one at the top and one at the bottom of each end. The structure is simulated and analyzed in a Finite Element Modelling (FEM) software and the necessary results are obtained. The results from this analysis are validated using the experimental results. © 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item Stress Analysis of Thin Rectangular Sections Subjected to Twisting Moment(Springer, 2024) Joshi, S.V.; Kaliveeran, V.The major issue in the stress analysis of thin sections is the stress concentration on the edges, especially the sharp edges. Whilst analysing thin sections for any analysis, be it flexural, torsional, axial etc., the phenomenon of sharp edge stress concentration reduces the quality of results of the analysis. Thus, it becomes necessary to determine the particular loading orientations in order to study the analysis in its purest form without the interventions of other unnecessary behaviours. The present study is about the stress analysis of thin rectangular section, when it is subjected to a twisting moment. A thin rectangular member of dimensions, length = 100 mm, depth = 40 mm, and width = 1 mm is considered with one end of the length as fixed and the other end as free. A torque of magnitude 0.1 Nmm is applied at the free end. Initially, a theoretical analysis is done and the point of maximum shear stress is determined. Then numerical analysis of the same is done on an FEM modelling software with different combinations of loadings in the form of a twisting moment. The determination of the exact load orientation which simulates the pure torsional moment behaviour for a thin rectangular section is the main objective of this study. The results obtained by FEM modelling on the software are validated theoretically and experimentally. © 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.