Tham khảo tài liệu 'mechanics of materials - (3rd ed , by beer, johnston, & dewolf) episode 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | For the machine element and loading shown determine the stress at point A knowing that a h in. Ố h in. PROBLEM SOLUTION t Cai h - r - 0. M. r2 .4 A - h R ft rk ồ in. z r 0 5 ỉ e - r - R - o. Oĩĩgct lr M - - Zoo Ji . i J yA - ft - rt - o. 37HỈÍ s. - - h _ r_. 1 A Aert r Co ô75S f e 3. Ổt5 í s f b h - . s r - 0. tỉMj ra zo tv. A rs - o. ỡ _ ồ - I. ỠS2OÍ ỈH. X0 Ạ xrt -g . F - rj - L2S ỉh. e - - R 0. IC778 M - - 2ôồ ft Ì . 6 Aev R - - v __ Zpo 0 5B3o x. 0 o 0. ÌC71 L-SMữ 9 urwo PROBLEM T vo aluminum strips and a steel strip are to be bonded together to form a composite member of width b 60 mm and depth h 40 mm. The modulus of elasticity is 200 GPa for the steel and 75 GPa for the aluminum. Knowing that M 1500 N m write a computer program to calculate the maximum sưess in the aluminum and in the steel for values of a from 0 to 20 mm using 2-mm increments. Using appropriate smaller increments determine ứ the largest stress that can occur in the steel Ố the corresponding value of fl. SOLUTION Abg o 7Z MW CCỴy ỹL 7Ẻ t b 60 mm h 40 mm M 1500 Moduli of elasticity steel 200 GPa Aluminum 75 GPa OUTPUT a I sigma sigma aluminum steel mm m 4 10 6 MPa MPa scan S2 s a a Find a1 for max Steel stress and the corresponding aluminum stress Max Steel Stress MPa occurs when a mm Corresponding Aluminum stress - 62 5 MPa PROBLEM A beam of the cross section shown made of a steel that is assumed to be elastoplastic with a yield strength Tỵ and a modulus of elasticity E is bent about the X axis
