A rectangular strain gauge rosette was employed to determine o = 4350 psi and o = 1450 psi, as shown below. Calculate the magnitude of o, o and t if 0 = 30°. Note: A rectangular strain gauge rosette can be used to measure the strains and then help determine the in-situ stresses, we will discuss the use of a strain gauge later in the class, but it does not impact stress calculations here. y 02 01

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Solid Mechanics

Engineering mechanics is a branch of science that deals with forces causing bulk motion in bodies and the effect that these forces cause on the bodies. Engineering mechanics does not deal with the internal changes that occur on account of these external forces. The internal effects in a body or a material under the action of external forces are studied in a new branch of science called solid mechanics, the strength of materials, or the mechanical behavior of engineering materials.