Accession Number : ADD018568

Title :   Method and System for Determining Axial Modulus.

Descriptive Note : Patent, Filed 18 Dec 95, patented 29 Apr 97

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hull, Andrew J

Report Date : 29 Apr 1997

Pagination or Media Count : 7

Abstract : A method is provided for determining the axial modulus of an elongate material sample of mass density (p) and length L. The first end of the sample is driven longitudinally at a frequency of excitation (omega). The second end of the sample opposite the fIrst end may or may not be under tension. At the frequency of excitation (omega), the longitudinal displacement and longitudinal force at the first and second ends of the sample are determined. The axial modulus is calculated for any frequency as a function of mass density (p), length L. frequency of excitation (omega), and longitudinal displacement and longitudinal force at the first and second ends.

Descriptors :   *MODULUS OF ELASTICITY, *PATENTS, TRANSFER FUNCTIONS, TENSILE STRESS, STIFFNESS, DISPLACEMENT, EIGENVALUES, TENSION, ELONGATION, AXIAL LOADS, POLYESTER FIBERS

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE