Tham khảo tài liệu 'crc press mechatronics handbook 2002 by laxxuss episode 2 part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 6. Lawrance A. Modern Inertial Technology-Navigation Guidance and Control Springer-Verlag New York 1993. 7. McConnell K. G. Vibration Testing Theory and Practice New York Wiley 1995. 8. Machine Vibration Dynamics and Control London Springler 1992-1996. 9. Measuring Vibration Bruel Kjaer 1982. 10. Sydenham P. H. Hancock N. H. and Thorn R. Introduction to Measurement Science and Engineering New York Wiley 1989. 11. Tompkins W. J. and Webster J. G. Interfacing Sensors to the IBM PC Englewood Cliffs NJ PrenticeHall 1988. Force Measurement M. A. Elbestawi Force which is a vector quantity can be defined as an action that will cause an acceleration or a certain reaction of a body. This chapter will outline the methods that can be employed to determine the magnitude of these forces. General Considerations The determination or measurement of forces must yield to the following considerations if the forces acting on a body do not produce any acceleration they must form a system of forces in equilibrium. The system is then considered to be in static equilibrium. The forces experienced by a body can be classified into two categories internal where the individual particles of a body act on each other and external otherwise. If a body is supported by other bodies while subject to the action of forces deformations and or displacements will be produced at the points of support or contact. The internal forces will be distributed throughout the body until equilibrium is established and then the body is said to be in a state of tension compression or shear. In considering a body at a definite section it is evident that all the internal forces act in pairs the two forces being equal and opposite whereas the external forces act singly. Hooke s Law The basis for force measurement results from the physical behavior of a body under external forces. Therefore it is useful to review briefly the mechanical behavior of materials. When a metal is loaded in uniaxial tension uniaxial .
