Įstrižai lenkiamos daugiasluoksnės sijos standumo ir stiprumo tyrimas ; Research on the Stiffness and the Strength of Multilayer Jigs Subjected to Skew Bending

In this Master of Science thesis was analyzed skew bended multilayer beams stiffness dependence on material elastic modulus and strength of the beam from the beam geometrical parameters and elastic modulus. As the Objects of investigation was selected two scalene angles 100x63x6, 100x63x10, and one isosceles 100x100x6. Scalene angles were filled with different materials of different elastic modulus. End of the beam was loaded 10 kN force. Skew bend in this multilayer beam arise because the elastic modulus of angles and filled materials are different, and then the coordinate system of stiffness center do not coincident with geometrical coordinate system. Filled angle was chosen for practical use, because when we filled it with another cheaper material, it could be increased the skew bending stiffness. Beam become square or rectangular, that allows easier installation of the beam in place. Survey used two methods - the analytical calculations and FEA (Finite Element Analysis). The results were obtained from analytical calculations and the FEA, and compared.