scholarly journals A generalised approach to the calibration of orthotropic materials for thermoelastic stress analysis

2008 ◽  
Vol 68 (3-4) ◽  
pp. 743-752 ◽  
Author(s):  
T.R. Emery ◽  
J.M. Dulieu-Barton ◽  
J.S. Earl ◽  
P.R. Cunningham
Keyword(s):  
Stress Analysis ◽  
Thermoelastic Stress ◽  
Orthotropic Materials ◽  
Thermoelastic Stress Analysis

The application of thermoelastic stress analysis techniques to composite materials

1988 ◽  
Vol 23 (3) ◽  
pp. 137-143 ◽  
Author(s):  
P Stanley ◽  
W K Chan
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Stress Analysis ◽  
Thermoelastic Stress ◽  
Orthotropic Materials ◽  
Quantitative Interpretation ◽  
Thermoelastic Stress Analysis ◽  
Relevant Theory ◽  
Analysis Techniques ◽  
Thermoelastic Response

The application of the thermoelastic technique (SPATE) to two different composite material specimens is described and the results are critically discussed. The relevant theory, which permits a quantitative interpretation of the thermoelastic response from orthotropic materials, is outlined.

Determining Orthotropic Coefficients From, and Thermoelastic Stress Analysis of, Diametrally Loaded Composite Disk

2006 ◽  
Author(s):  
Simon Quinn ◽  
Shiang-Jiun Lin ◽  
Jonathan McCabe ◽  
Robert E. Rowlands
Keyword(s):  
Stress Analysis ◽  
Thermoelastic Stress ◽  
Orthotropic Materials ◽  
Uniaxial Tensile ◽  
Measured Signal ◽  
Loading Frequency ◽  
Thermoelastic Stress Analysis ◽  
Ambient Conditions ◽  
Orthotropic Composites ◽  
Stress Changes

Thermoelastic stress analysis measures temperature variations in loaded solids and relates these to associated stresses. For orthotropic materials, the measured signal is proportional to a linear combination of the normal stress changes in the directions of material symmetry, and K1 and K2 are thermo-mechanical coefficients. Quantitative thermoelastic stress analysis of orthotropic composites necessitates (i) determination of the above two thermo-mechanical coefficients (i.e. calibration), and (ii) separation of the stresses. Although calibration procedures can take different forms, K1 and K2 can be experimentally determined most reliably and easily from calibration specimens of the same material, paint coating, loading frequency and ambient conditions as the test structure. Such calibration specimens typically employ a geometry and loading for which the state of stress or strain is known theoretically, or independently determined. Loaded beams, a diametrically-compressed disk, or uniaxial tensile coupons have been used for isotropic materials. Orthotropic materials usually necessitate testing two calibration specimens, with their principal material directions interchanged respectively. The present paper demonstrates the ability to determine both K1 and K2 from a single diametrally-loaded orthotropic composite (graphite/epoxy) disk. To be able to determine both coefficients from a single calibration specimen is advantageous. Disks are also easy to machine and load, rendering them very convenient for calibration.

Thermoelastic Stress Analysis

1982 ◽  
Vol 29 (4) ◽  
pp. 555-563 ◽  
Author(s):  
L.R. Baker ◽  
J.M.B. Webber
Keyword(s):  
Stress Analysis ◽  
Thermoelastic Stress ◽  
Thermoelastic Stress Analysis

Hybrid Thermoelastic Stress Analysis of a Pinned Joint

2013 ◽  
Vol 54 (4) ◽  
pp. 515-525 ◽  
Author(s):  
W. A. Samad ◽  
A. A. Khaja ◽  
A. R. Kaliyanda ◽  
R. E. Rowlands
Keyword(s):  
Stress Analysis ◽  
Thermoelastic Stress ◽  
Thermoelastic Stress Analysis
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