Computer · Mechanics of Materials
In a two-dimensional stress analysis, the state of stress at a point is given such that on three planes forming a triangle PQR, the lengths of PQ, QR, and RP are 4, 3, and 5 units, respectively. If the normal stresses on PQ and QR are 120 MPa (tensile) and 80 MPa (tensile) respectively, and the shear stress is zero on these planes, determine the principal stresses.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1σx = 16.0 MPa, σy = 138.5 MPa
- 2σx = 67.5 MPa, σy = 213.3 MPa
- 3σx = 54.0 MPa, σy = 128.5 MPa
- 4σx = 26.7 MPa, σy = 172.5 MPa✓
Correct answer
σx = 26.7 MPa, σy = 172.5 MPa
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