Abstract
The paper presents the results of the numerical and experimental analysis of the stress distribution in a wall beam with geometrical discontinuities subjected to flexural bending. These discontinuities are represented by five circular holes arranged symmetrically with respect to the longitudinal axis of the beam. The numerical analysis was performed with the finite element method and the experimental investigation by electrical strain gauge. The finite element method applied in 2D and 3D for the case of hollow wall beams confirms that Bernoulli's assumption and the hypothesis regarding the variation of stresses on beam height made in the strength of the materials in the beam calculation cannot be used in this case. The results obtained with the finite element method and the experimental ones with the electrical strain gauge method are presented and their comparison is made. The contribution of the experimental research to the selection of a model as close as possible to the practical reality is emphasized. The results of the research allow to draw conclusions about how to position the electrical transducers on the wall beam at the chosen analysis points and its influence on the stress distribution.
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