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Unformatted text preview: ; Problem 7.4-2 An element in uniaxial stress is subjected to tensile stresses s x 49 MPa, as shown in the figure Using Mohrs circle, determine: (a) The stresses acting on an element oriented at an angle u 27 from the x axis (minus means clockwise). (b) The maximum shear stresses and associated normal stresses. Show all results on sketches of properly oriented elements. y x O 49 MPa Solution 7.4-2 (a) E LEMENT AT Point C: s c R s c 24.5 MPa 2 u 54.0 R s x 2 R 24.5 MPa u 27 s x 49 MPa s y 0 MPa t xy 0 MPa Point D: Point s y 1 10.1 MPa ; D s y1 R R cos ( |2 u | ) t x 1 y 1 19.8 MPa ; t x 1 y 1 R sin (2 u ) s x 1 38.9 MPa ; s x 1 R + R cos ( | 2 u | ) 07Ch07.qxd 9/27/08 1:19 PM Page 595...
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- Fall '11