Some form of linear actuators or even rack and pinion system can be used to

Some form of linear actuators or even rack and pinion

This preview shows page 100 - 102 out of 170 pages.

even rack and pinion system can be used to raise and lower the plate, as well as lock in place to eliminate the C-clamps used. A hydraulic system for this top plate was discussed but would be inferior to the actuators or rack/pinion due to its compressibility factor and the reaction forces of the test plate. The hydraulic cylinder was sent out for a leakage and pressure test, which it passed as expected. Even though a pressure gauge was used to monitor and adjust the pressure (via a pressure regulator) of the system prior and during tests, this is not sufficient enough to guarantee exact force requirements. A calibrated digital pressure gauge or transducer in combination with a electronic pilot-operated pressure regulator will provide the additional accuracy needed to reduce overall errors. In the instance that the manufacturers’ product specifications are incorrectly documented, like cylinder piston bore size, the force imposed by the cylinder could be different than expected. For this, a calibrated force transducer can be used to accurately verify the applied force. Such a design could be used to do research on not only steel, but plates of any material. Vitreous materials such as glass can be seen in the naval, air and construction industries mainly in the form of windows. Composite materials come in many types ranging from plywood and
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Plate Bending Test Bench for FEA Comparison Spring 2010 Florida International University – Dept. of Mechanical and Materials Engineering Page 101 fiberglass to engineered composites. Testing of these materials is integral as their material properties show many nonlinearities which are difficult to model using finite element solvers. References [1] Inspection Gaging & Testing, Society of Manufacturing Engineers Publications/Marketing Division, Dearborn, MI, 1984. [2] Luciano O. Mantovano, Pablo Amenta, Roberto Charreau, Daniel Johnson, Andrea Assanelli and Rita G. Toscano, “Finite Element Modeling and Experimental Validation of Buckle Arrestors for Deepwater Pipelines,” Mecánica Computacional Vol XXV, pp. 687-704, 2006. [3] Al-Asady Nawar A., Abdullah S., Ariffin A.K., Beden S.M., Rahman M.M., “Comparison Between Experimental Road Data and Finite Element Analysis Data for the Automotive Lower Suspension Arm” European Journal of Scientific Research, Vol. 29, No. 4, pp. 557-571, 2009 [4] The Measurements, Instrumentation, and Sensors Handbook, Webster, John G. (Editor-in-Chief), CRC Press LLC, Boca Raton, FL, 1999. [5] FM 5-499 Hydraulics, Headquarters, Department of Army, Washington, DC, 1997. [6] Exxon Mobil Corp. “Dte 20 series,” Hydraulic oils. Fairfax, VA. Jan. 2006. [7] Exxon Mobil Corp. “EAL 2hs,” Hydraulic fluids. Fairfax, VA. June 2006. [8] Beer, Johnston, Dewolf, “Mechanics of Materials,” Mc Graw Hill, Fourth ed. 2006.
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