Castellanos, Leopold J.2022-10-062022-10-06196813864241https://hdl.handle.net/10657/12207This research presents the design, construction, and evaluation of a membrane analogy apparatus for the torsion analysis of non-circular sections (prismatic bars). The purpose of this project was to construct and demonstrate the use of the apparatus. The degree of error obtained by the apparatus was determined by performing experiments with the following three sections: 1. Square (3" x 3") 2. Equilateral Triangle (4" side) 3. Rectangle (2" x 3") The order of error was 1 to 5 percent. Thin Plastic (Polyethylene) material (0.0015" thickness) and a rubber membrane (0.009" thickness) were used to carry out the membrane analogy experiment. Contours and graphs are presented for each section mentioned above. The apparatus is easy to construct and is inexpensive. Experiments can be performed with the apparatus without much difficulty. The percentage error due to the apparatus can be reduced to a great extent by a few alterations in the design. A large amount of error in results is due to the membrane material which is not an ideal membrane.application/pdfenThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. Section 107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.Thesisreformatted digital