The state of stress at a point are σxx = +60 MPa, σyy = 20 MPa, σzz = −20 MPa, τxy = 15 MPa, τyz = τzx = 0.

Question 1

The state of stress at a point are σxx = +60 MPa, σyy = 20 MPa, σzz = −20 MPa, τxy = 15 MPa, τyz = τzx = 0. Determine (a) the principal stress, (b) the direction cosines of maximum principal stress and (c) the octahedral shear stress.

Question 2

Direction cosines of maximum principal stress are

The state of stress at a point are σxx = +60 MPa, σyy = 20 MPa, σzz = −20 MPa, τxy = 15 MPa, τyz = τzx = 0.

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The state of stress at a point are σxx = +60 MPa, σyy = 20 MPa, σzz = −20 MPa, τxy = 15 MPa, τyz = τzx = 0.

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