A11 - horizontal and vertical planes at the point are...

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CIV 207 – Winter 2009 Assignment #11 Friday, March 27 th Complete the first three questions. Submit your work to Box #5 on the 4 th floor of the MacDonald building by 12 noon on Tuesday April 7 th . No late submissions will be accepted. The second set of three questions are for practice only. Groups of up to 3 members are permitted. Clearly print your names and student numbers on your submission. Ensure that the submission is properly stapled. 12.22 The stresses shown in a act at a point on the free surface of a stressed body. Determine the normal stresses σ n and σ t and the shear stress τ nt at this point if they act on the rotated stress element shown in Fig. b. (a) (b) 12.29-32 Consider a point in a structural member that is subjected to plane stress. Normal and shear stresses acting on
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Unformatted text preview: horizontal and vertical planes at the point are shown. (a) Determine the principal stresses and the maximum in-plane shear stress acting at the point. (b) Show these stresses on an appropriate sketch (e.g., see Fig. 12-15 or Fig. 12-16) (c) Compute the absolute shear stress at the point. 29) 30) 31) 32) 12.42 At a point on the free surface of a stressed body, a normal stress of 64 MPa (C) and an unknown positive shear stress exist on a horizontal plane. One principal stress at the point is 8 MPa (C). The absolute maximum shear stress at the point has a magnitude of 95 MPa. Determine the unknown stresses on the horizontal and vertical planes and the unknown principal stress at the point. For practice 12.19 12.35 12.43...
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