Abstract

Mechanical behaviors comparison of sandwich beams with diversified core material among epoxy, polyamide and wood, as well as, a solid steel beam was executed under a shear force, a concentrated load and a distributed load, with the attention that, the last two load types producing combined shear and bending stresses. Another mechanical behavior was considered where the static deflections from the specimens, especially the sandwich ones, have two contributor values provided from both bending and shear rigidities. A theoretical analysis and a numerical simulation were utilized for validation and comprehension purposes of the output results and conclusions. With taking into consideration, the comparison parameters that must be constant were the core thickness 10 mm, face thickness 3 mm, total thickness 16 mm, length 300 mm, width 20 mm and steel for faces material. The results conclude that employment of sandwich beam over a solid one with the same dimensions and vice versa, lead to a significant fluctuation in the object's mechanical behavior and weight, where the targeted result is high rigidity to weight ratio which provided by the sandwich beam. In other words, the specimen's flexural rigidity has a significant impact on its un-similar stresses' categories of shear stress, bending stress and these two stresses combined, as well as, its static deflection.

Keywords:

Concentrated load, distributed load, flexural rigidity, sandwich beam, shear force, static deflection,

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