Stereo-DIC measurements of thermal gradient effects on the vibratory response of metals

Ryan Berke, Ravinder Chona, Arthur Ding, John Lambros, Eann Patterson, Christopher Sebastian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Thermomechanical problems have been much less studied than their room temperature counterparts as challenges arise both with metrology and with interpretation of results. This effort aims to shrink this knowledge gap by investigating the influence of thermal effects on the high frequency vibratory response of metals. The present study concentrates on how an inhomogeneous temperature field (max. 600 °C) affects the vibratory response, and specifically mode shapes and resonant frequencies, of a vibrating plate. A plate made of a nickel-based superalloy, Hastelloy X, was heated by induction heating and the temperature distribution was estimated by measuring the out-of-plane curvature resulting form heating. Harmonic vibratory loading at frequencies exceeding 1 kHz was applied using a programmable shaker. Stereo-vision digital image correlation (stereo-DIC) was used to obtain a full-field representation of the vibrating plate. An image decomposition analysis technique based on Tchebichef polynomials was used to compare room and high temperature mode shapes. Results indicate that there is a small influence of temperature on resonant frequencies, even though mode shapes remain similar between room and high temperature vibration.

Original languageEnglish (US)
Title of host publicationRotating Machinery, Hybrid Test Methods, Vibro-Acoustics
EditorsJames De Clerck, David S. Epp
PublisherSpringer New York LLC
Pages35-41
Number of pages7
ISBN (Print)9783319300832
DOIs
StatePublished - Jan 1 2016
Event34th IMAC, A Conference and Exposition on Structural Dynamics, 2016 - Orlando, United States
Duration: Jan 25 2016Jan 28 2016

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume8
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Other

Other34th IMAC, A Conference and Exposition on Structural Dynamics, 2016
CountryUnited States
CityOrlando
Period1/25/161/28/16

Keywords

  • High temperature measurement
  • Image decomposition analysis
  • Induction heating
  • Stereo digital image correlation
  • Thermo-acoustic loading

ASJC Scopus subject areas

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

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