Question: 3. A symmetrical framework consisting of three pinconnected bars is loaded by a force P (see figure 3). The angle between the inclined bars

3. A symmetrical framework consisting of three pinconnected bars is loaded by

3. A symmetrical framework consisting of three pinconnected bars is loaded by a force P (see figure 3). The angle between the inclined bars and the horizontal is a 52. The axial strain in the middle bar is measured as 0.027. Determine the tensile stress in the outer bars if they are constructed of a copper alloy having the following stress-strain relationship: 124020 1+ 300 0 0.03 ( = MPa) B a C P Figure 3

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