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Experimental Mechanics @
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Abstracts on Thermoelasticity |
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ON DETERMINING STRESS INTENSITY FACTORS FOR MIXED
MODE CRACKS FROM THERMOELASTIC DATA
R. A. Tomlinson, A. D. Nurse And E. A. Patterson Fatigue Fract. Engng Mater. Struct. (1997)
Vol. 20, No.2, pp. 217-226 Abstract: An alternative
methodology is presented for determining stress intensity factors for cracks
subject to mixed-mode displacements. The methodology involves thermoelastic
data generated from a SPATE (Stress Pattern Analysis by Thermal Emission)
system and has been adapted from one used successfully in photoelasticity.
The thermoelastic data is collected throughout the elastic stress field
dominated by the crack tip singularity. The stress field is described using a
Fourier series within Muskhelishvili's approach.
This method allows different applied stress fields to be described which may
include transient or non-uniform stress fields. The results obtained using
the new methodology are at least as good as those
obtained previously for pure mode I cases, and generally better for mixed
mode displacement conditions. |
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POLYMER COATING AS A STRAIN WITNESS IN
THERMOELASTICITY
S. Barone and E. A.
Patterson Journal of Strain Analysis (1998) Vol 33, Num 3, pp. 223-232 Abstract: The work described in
this paper offers the possibility of using a polymer coating as a strain wit-
ness in thermoelasticity. In particular, the efficacy of a polymer coating
for making thermoelastic measurements is investigated by experiment and the
supporting theory is presented. It was found that the thermoelastic response
is greatest with thick coatings at high frequencies. However, thicknesses of
more than 0.5 mm and frequencies greater than 5 Hz provide adequate results. |
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THERMOELASTICITY FOR THE ANALYSIS OF CRACK TIP
STRESS FIELDS - A REVIEW
R. A. Tomlinson and E. J. Olden Strain (1999) Vol. 35, No. 2, pp. 49-55 Abstract: A comprehensive review is given of
methods to determine the stress intensity factor at crack tips using
thermoelastic stress analysis. In order to obtain accurate results a number
of areas of experimental procedure need to be considered and these are
discussed in detail. The paper concludes with a discussion on the future
potential of the use of thermoelasticity for the analysis of cracks. |
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