Accession Number:

AD0269419

Title:

EFFECT OF COLD-WORK AND ROLLING DIRECTION ON THE STRAIN HARDENING OF IRON

Descriptive Note:

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1961-08-01

Pagination or Media Count:

1.0

Abstract:

A -269 4199N6 AD-269 420Div. 25, 1, 12U TISTECDM OTS price 6.60Air Force Inst. of Tech., Wright-Patterson Air Force Base, Ohio. STUDY OF THE DIS PATION OF INTERNAL ENERGY IN A VIBRATING BEAM. Masters thesis, by George Robert Blitch and Joseph Green. Aug 61, 63p. incl. illus. tales, 10 refs. Rept. no. GAEMech 61-10 Unclassified report DESCRIPTORS Theses, Cantilever beams, Vibration, Damping, Hysteresis, Test meth ods, Tests, Mathematical analysis, Differ ential equations. Satellite ehiles, Design, Theory, Stresses, Structures. 0 Efforts were devoted to the dissipaton of internal energy in a vibrating cantilever beam represented by the area of the hysteresis loop formed by the loading and unloading curves. In a cantilever beam undergoing forced transverse vibration, the phenomenon of internal damping appears as a small non-linear term in the equation for the energy contained in the beam due to the deflection of the beam. The energy loss per cycle in the beam, measured by experimental techniques, is equal to the area of the hysteresis loop. The equation of the hysteresis loop contain parameters which are characteristic of the material in the beam. A detailed experimental study, based on the present analysis and esign, will de ermine the nature and applicability of the charactristic parameters. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE