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Consider an unsymmetrical composite beam built up of two rectangular cross section beams made up of an upper beam which is stacked on top of a lower beam so that both beams are strongly bonded to each other so they act as a single unit. The upper beam has a breadth of B1 = 0.096518 meters, a height of H1 = 0.150637 meters and a Youngs modulus of E1 = 9.765444E9 pascals. The lower beam has a breadth of B2 = 0.145431 meters, a height of H2 = 0.011635 meters and a Youngs modulus of E2 = 2.072366E11 pascals. In this beam the cross section lies in the yz-plane and the x-axis spans the length of the beam. The origin of the yz-axes is at the intersection of the neutral axis which corresponds to the z-axis and the line of symmetry of the cross section. When this choice of coordinate system is used in the yz-plane the distance from the top surface of the upper beam to the z-axis is h1 meters, and the distance from the bottom surface of the lower beam to the z-axis is h2 meters. For this configuration calculate the value of h2 in units of millimeters as h2 |
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