Joshi, S.V.Kaliveeran, V.2026-02-082024Springer Proceedings in Materials, 2024, Vol.36, , p. 179-19226623161https://doi.org/10.1007/978-981-96-8070-2_25https://idr.nitk.ac.in/handle/123456789/33578The 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.Experimental studyFinite element analysisOffshore structuresStress concentrationThin rectangular sectionsTorsion