tailieunhanh - mechanics of materials 3rd 2010

Technology is the making, modification, usage, and knowledge of tools, machines, techniques, crafts, systems, methods of organization, in order to solve a problem, improve a preexisting solution to a problem, achieve a goal, handle an applied input/output relation or perform a specific function. It can also refer to the collection of such tools, machinery, modifications, arrangements and procedures. Technologies significantly affect human as well as other animal species' ability to control and adapt to their natural environments. The word technology comes from Greek τεχνολογία (technología); from τέχνη (téchnē), meaning "art, skill, craft", and -λογία (-logía), meaning "study of-".[1] The term. | PROBLEM Two solid cylindrical rods AB and BC are welded together at B and loaded as shown. Knowing that dỵ 30 mm and d2 5 mm find the average normal stress in the mid section of a rod AB b rod BC SOLUTION 3 3 roe AB Foirce p ẻ o x ù1 Ụ ý is ữ Area- A - al Ẹ sox ô 3 - 7ũCSỔ o 4 Nơr n d s ress SAS Jr - .A - w S8 X 04 pq fl fUfo. Qtt ffj 6 8 MPa b roc Be Force p Gox O1 - XÍ01 - I9o X O3 N Area. A dj z ỈD s hi1 Ajor v a7 stress . Cffc - y - 16-T7 X OỂ Pq. Sfic - MPa. PROBLEM Two solid cylindrical rods AB and BC are welded together at B and loaded as shown. Knowing that the average normal stress must not exceed 150 MPa in either rod determine the smallest allowable values of the diameters d and dj. SOLUTION rod A8 p GOX IO3 hỉ Area A - oil4 -- T A I J L Ỉ ji y-p_ _ 4-V6OX O3 TT ISO K O d - x a 3 H s ress 6 . ISO Xia . A 504. 3 X 0 c n 2 - 33 Ố rod 8C Force p - ỂOxlO3 - o - - 1 0 xl o M s reii . - ISO IO Pa A e K- A - ỹdự A -nd2 J u i p Tĩơec x TT Q- ỈSO X o - 40. lé XỊo vn dj - .

• Cơ khí - Chế tạo máy
• The subject of rock mechanics
• Content of this book
• Geological setting
• Natural rock environments
• Stress as a point property