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784_Mechanics Homework Mechanics of Materials Solution

784_Mechanics Homework Mechanics of Materials Solution - O...

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Unformatted text preview: O r—I r——1‘ r—J r'fi r'_l [—1 ‘65?“ O “ g». PROBLEM 7.27 '6, SJ: 6;“20 ? 7. 27 For the state of plane stress shewn, determine the largest value of q, for which the maximum ln-plane shearing stress is equal to or less than 15 ksi. SOLUTION 6‘,‘ = I2 km; 65,: ? 11.3: 1-H“; LeJr U=€ME€ 53: 5'1- U1+ 13" r IS ks} i (R‘- T171- : i ’I$‘—qt =il‘*.‘+57 103? :2 IF (zlcwfisfl r 40.3 145;) 443,9] ks.' Larcjcs‘l' Vaflue $0,. 63 is required. 6:), 3 90.? ksf -‘ PROBLEM 7.28 '8ksi (“J 7.28 For the state of plane stress shown, determine (a) the largest value of 1;, tbr which the maximum in-plane shearing stress is equal to or less than 12 ksi, (b) the corresponding principal stresses. SOLUTION Garzloksu') 6:73-8 ksg‘J 1””: HR (”L-”l * t1 ' I2 kSt' ...
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