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Mechanics of Materials Hibbeler 4th-Chapter Episode 13

Tham khảo tài liệu 'mechanics of materials hibbeler 4th-chapter episode 13', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 12-121. The assembly consists of a steel and an aluminum bar each of which is 1 in. thick fixed at its ends A and B and pin connected to the rigid short link CD. If a horizontal force of 80 lb is applied to the link as shown determine the moments created at A and B.ES 29 103 ksi Eai 10 103 ksi. -XF o P.i F -80 0 1 Compatibility condition Aj Aa P L _ P.iD ĨE I ĨE. 1 1 Ft P v- P talkt 29X10 X X X05J p loxio xfcxw p 0.3625 P i 2 Solving Eqs. 1 and 2 yields păl 58.72 lb p 21.28 lb MĂ p 30 639 lb in. 0.639 tap in. Ans Mb P.i 30 1761 lb in. 1.76 tap in. Ans 12-122 Determine the reactions al the supports then draw the shear and moment diagrams El is constant. The bearings exert only vertical reactions on the shall. A _ 5w 2 4 5wL 768 48 7 A g 2Z. a _ ByC t 48EI 6EỈ Requứe 1 0 A - A 0 - 5wL - ỀỉỉL 4SE 6EI By -wL T Ans 8 0 w ệ - ỊwL L - Cy 2L 0 T X Fy 0 -wL - ỊwL A 0 16 8 Ay -y-wL Ans 16 12-123. rhe A-36 steel beam and rod are used to support the load of 8 kip. If it is requừed that the allowable normal stress for the steel is cralIow 18 ksi and the maximum deflection not exceed 0.05 in. determine the smallest diameter rod that should be used.The beam is rectangular having a height of 5 in. and a thickness of 3 in. 6 5 5 12 8-F 48 3 AE 3K X3 5 3 Assume rod reaches its maximum stress. ơ 18 10i 18 5X12 _ 1179.648 8-F E F 7.084 kip Maximum stress in beam. Me _ 8 - 7.084 48 2 5 Èr@X5 3 3.52 ksi 18ksi OK Maximum deflection 8 - 7.084X48 3 3E1 3 29 I03 jjX3 5 3 0 0372 0 05 OK Thus A Ts 0 39356 2 7 d1 18 4 d 0.708 in. .