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785_Mechanics Homework Mechanics of Materials Solution

785_Mechanics Homework Mechanics of Materials Solution -...

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Unformatted text preview: PROBLEM 7.29 75 MM: S" = 63 +20 7.29 Determine the range of values of c; for which the maximum in—plane shearing messisequaltoorlessthanSOMPa. SOLUTION 40 MP“ 6w? SJ=75 MP4, farlf'OHPa. .7 6» Let u=§LJ§L 6,.= Gav-P20 2. R = Uri-4- 7.1;" = 21..“ ‘ SD M134 U =_ i IRI'T‘U‘. a i1/J3—Dt— ”-0“ = iBOMPG. = 75 1 (use) =- 135 MP4. , :5 MPa mmue flanje IS MP5. s G, s :35 MFA -- PROBLEM 7.30 7.30 For the state of plane stressshown, determine (a) the value of r3, for which the in—plane shearing stress parallel to the weld is zero, (b) the corresponding principal stresses. SOLUTION 6'” \2 MPa) 63:2 MFA) 21,: ? I Slum-6‘ fwy' = 0', Xl-elif‘2ca‘l'l'um is a. Principal An‘reait'un. GP: —15° «.1 ...
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