Rosette Number: Moment of Bending Moment inch-Ibs Beam PropeeMoment Arm Load (lb

Question

Rosette Number: Moment of Bending Moment inch-Ibs Beam PropeeMoment Arm Load (lbs) Inertia Length Poisson's Ratio" |Yield S rength|Beam width Material Modulus (inches) (pt) 2 lbs 6061-T4 1 00000 0-33 21000 Aluminum glis Maximum Load, X,-2: retical 413 1535 Exper- imental 4-99 230 Instructions See the reverse side (next page) for Experimental Instructions -14-3 Questions: At what orientation is the strai rosette mounted on the beam? Your answer should state one of the gages in the rosette as a reference to your chosen coordinate system From the strain circle, at what orientations relative to the l-axis would a strain gage give a zero output? degrees

Explanation / Answer

The question requires you to answer the value of principle strain angle. In that case, we would apply the formula of tan (theta)p. In the solution, it is 22.52° and 22.47°

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