For each of the plane stress states listed below, draw a Mohr’s circle diagram...

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For each of the plane stress states listed below, draw a Mohr’s circle diagram properly labeled,
find the principal normal and shear stresses, and determine the angle from the x axis to σ1. Draw
stress elements and label all details.
(a) σx = 20 kpsi, σy = −10 kpsi, τxy = 8 kpsi cw (this means: -8 kpsi)
Textbook:
Shigleys Machine-design 9th Ed. Problem: 3-15
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