tailieunhanh - FUNDAMENTALS OF MACHINE COMPONENT DESIGN

The latest edition of Juvinall/Marshek's Fundamentals of Machine Component Design focuses on sound problem solving strategies and skills needed to navigate through large amounts of information. Revisions in the text include coverage of Fatigue in addition to a continued concentration on the fundamentals of component design. Several other new features include new learning objectives added at the beginning of all chapters; updated end-of-chapter problems, the elimination of weak problems and addition of new problems; updated applications for currency and relevance and new ones where appropriate; new system analysis problems and examples; improved sections dealing with Fatigue; expanded coverage. | Student Solutions Manual containing selected solutions to FUNDAMENTALS OF MACHINE COMPONENT DESIGN 3rd Edition by Robert C. Juvinall and Kurt M. Marshek Copyright 2003 by John Wiley Sons John Wiley Sons Inc. New York f Chichester Weinheim Brisbane f Singapore Toronto SOLUTION 13 Known An automobile of weight w and wheel base L slides while braking on pavement with given coefficient cf friction. Tbe location of the center of gravity is specified Find lirsw a free-body diagram nf fhp antTimnhile Schematic and Given Data Assumptions L. The friction force is constant during braking. 2. Tltó véliĩởlẺ decelcrahoD is libĩíủiTti. 3. The motor exerts negligible torque on the wheels the motor is disconnected . Analysis 1. Jfotn summation of moments at point R X Mr -F L - Ah We 0 2. From summation of forces in the vertical direction ỵ F 0 R. w r 0 3. From summation of forces to the horizontal direction X F l - 0 A pH pF 0 4. Solving by eliminating A and R gives -EL phW Wo 0 1 r K - _ W c ph 5. Solving for F gives F ---- - In Comment For a 4000 lb vehicle with L 120 in. h 26 in. c 70 in. and 1. - 4000 lb 7Ũ _ M 1 h 40 lb 120 2. With the vehicle stationary the static force on die two front tires is 2330 lb. SOLUTION Known An engine and propeller rotate clockwise viewed from the propeller end A reduction gear bousing is bolted to the engine housing through the bolt holes shown. The power and angular velocity of the engine arc known. Find a Determine the direction and magnitude of the torque applied to the engine housing by the reduction gear housing. b Determine the magnitude and direction of the torque reaction ending to rotate roll the aircraft. c Find an advantage of using opposite-rotating engines with I win-engine propeller-driven aircraft. Schematic and Given Data