The Quantification of Errors in the Measurement of Nonlinear Ultrasonics Univ. of Illinois

Format:

Conference/Event

Author/Creator:

Abbasi, Abbasi, author.

Contributor:

Cunningham, Mary

Ozevin, Didem

Conference Name:

SAE 2015 World Congress & Exhibition (2015-04-21 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2015

Summary:

AbstractNonlinear ultrasonics is a powerful method for detecting microscopic damage and stress in materials. The method is based on introducing a perturbation signal at high frequency, and monitoring higher order harmonics for microscopic damage or quantifying the frequency shift for measuring stress. As the influence of microscopic damage and stress to the ultrasonic signal is weak, a highly precise measurement is needed. In this paper, errors in the measurement equipment, measurement methodology, and couplant type are experimentally quantified. Random errors and unknown systematic errors inherent to the method and its tools are defined. The measurement uncertainty in nonlinear ultrasonics is quantified. Based on the limitation of the measurement accuracy, minimum detectable stress level is defined

Notes:

Vendor supplied data

Publisher Number:

2015-01-0483

Access Restriction:

Restricted for use by site license