Question

Problems 27.28. & 29 The stress on an element is shown 8 ksi 10 ksi ksi Problem 27 Which Mohr's Circle correctly describes the state of stress? (b) (c) - 10 ks 10 si 1S ksi ܕ݁ܫܶ10_ܕ݁ܬ݁: ܙ ܕ݁܀ ܕ݁ܝܺܬ݁10- -10 -5 ks O Sesi BOL --10 --10 -10 o (ksi) O o Oksi) (ksi) 5 3 5 10 -10 -10 T T (ksi) T (ksi) (d) None of the above Problem 28 Determine the maximum in-plane shear stress. a) 6.08 ksi b) 9.82 ksi c) 11.82 ksi d) 10.82 ksi e) None of the above Problem 29 Determine the principal stresses. a) 6.08 ksi and -6.08 ksi b) 9.82 ksi and -11.82 ksi c) 11.82 ksi and -9.82 ksi d) 10.82 ksi and -10.82 ksi e) None of the above

Answer 1

74 al Igasi Sign 2 +ve +10ksi +ve. (+) I basi 6 $ 27 10,6) Element 1 Co-ordinate Element of Coosdinate = (-8,-6) Centre = (1,0) (-8,-6) (6min;o) (1,02 % (6 mar,o) 6(ksi) (106) elksi) the Ans (The Most Correct) c iu Correct. option 28 Maximum in plane shear Mohr Circle. (r) stress is equal to radius of (10-1) + 36 -) 10.8166 ksi 7 (10.82 ksi Ans d is Correct :, option

Q 29. Maximum principal stress => rodiny 62+ 6y tr 2 Extby of Circle. I + 10.82 3) 11.82 ks; Emax Ans Minimum principal stress → Ex+by 2 -7 Emin » I-10.822) 9.82 Ksi Ars option c is Correct 11.82 € - 9.82 ksi