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Question: 8 8 o 60 60 60 a delta example 3...

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8 8 o° 60 60° 60° A. Delta Example 3 A rectangular rosette of strain gauges on the surface of a material under stress recorded the following readings of strain. Gauge A: 450 x 10-6 Gauge B, at 45° to A: 200 x 10-6 Gauge C, at 90° to A:-200 x 10-6 the angle being counterclockwise from A. Determine: a) The magnitudes of the principal strains b) The directions of the principal strain axes, both by calculation and by Mohrs strain circle.
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