The torsion of homogeneous prismatic beams is relatively well researched. A theory that needs more attention, however, is the one that analyses torsion of composite beams with changing material properties. In this master's thesis, we focused on a composite beam loaded with torsional and bending loads. The result is a non-trivial stress field across the cross-section. We also compared the results of the theory with the results obtained with experimental testing. To achieve simpler calculation, we also developed a user interface that serves as a tool for a faster determination and calculation of stresses on the beam cross-section.
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