Thermoelastic analysis of a bearing-cage weld seam1

Eric Planting, Rohit Parvataneni, Yi Zhou, Abdel Mayyas, Junichi Nakagawa, Mohammed Omar

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This manuscript discusses the implementation of a thermo-elastic setup and analysis, to monitor and record the stress levels at the weld-seam of a bearing-cage, under different loadings. The setup includes a high speed, ultra sensitive infrared focal plane array and in-house developed pre and post-processing codes. The pre-processing neutralizes the emittance variation with the cage geometry using new mapping scheme, while the post-processor creates spatial neighbourhoods to average the stress signal and reduce the detector and the environment noise; also the algorithm checks for the adiabatic conditions through the synchronicity between the load cyclic frequency and that of the temperature differentials. The thermo-elastic investigation is done at different loadings from 20 - 140 Lbf at a frequency of 10 Hz, in two modes: a calibration mode with the weld-seam located at 9 o'clock position and a detailed mode with the weld-seam at 6 o'clock location. A Finite Element FE simulation is used to adjust the thermo-elastic constant using the calibration trials (weld at 9 o'clock). The detailed trials (weld at 6 o'clock) are then compared with the FE simulation, showing good agreement in predicting the stress values and maps. The proposed hardware and software map the stresses 3 dimensionally for the weld region with a 25 MPa resolution, in real-time and is found to resolve stress changes for each 20 Lbf loading.

Original languageEnglish (US)
Pages (from-to)133-146
Number of pages14
JournalQuantitative InfraRed Thermography Journal
Volume7
Issue number2
DOIs
StatePublished - 2010
Externally publishedYes

Fingerprint

Bearings (structural)
Welds
clocks
Clocks
cyclic loads
adiabatic conditions
Calibration
focal plane devices
preprocessing
emittance
Cyclic loads
Focal plane arrays
Elastic constants
central processing units
Processing
hardware
elastic properties
simulation
high speed
computer programs

Keywords

  • Heat affected zone
  • Stress measurement
  • Thermal imagery
  • Thermo-elasticity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Instrumentation

Cite this

Thermoelastic analysis of a bearing-cage weld seam1. / Planting, Eric; Parvataneni, Rohit; Zhou, Yi; Mayyas, Abdel; Nakagawa, Junichi; Omar, Mohammed.

In: Quantitative InfraRed Thermography Journal, Vol. 7, No. 2, 2010, p. 133-146.

Research output: Contribution to journalArticle

Planting, E, Parvataneni, R, Zhou, Y, Mayyas, A, Nakagawa, J & Omar, M 2010, 'Thermoelastic analysis of a bearing-cage weld seam1', Quantitative InfraRed Thermography Journal, vol. 7, no. 2, pp. 133-146. https://doi.org/10.3166/qirt.7.133-146
Planting, Eric ; Parvataneni, Rohit ; Zhou, Yi ; Mayyas, Abdel ; Nakagawa, Junichi ; Omar, Mohammed. / Thermoelastic analysis of a bearing-cage weld seam1. In: Quantitative InfraRed Thermography Journal. 2010 ; Vol. 7, No. 2. pp. 133-146.
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