A review of the general theory of thermoelastic stress analysis

Pitarresi, Giuseppe; Patterson, E. A.

doi:10.1243/03093240360713469

Cited by 181 publications

(133 citation statements)

References 20 publications

Supporting

Mentioning

132

Contrasting

Order By: Relevance

“…The expression of the thermoelastic heat source s the is given by s the = − Td ∕dt, where is the stress and T the temperature in Kelvin. [34][35][36] With T ≈ 300 K, s the thus oscillates between ±9400 kW.m −3 . For the present numerical illustration, the mechanical dissipation d 1 was assumed to be a constant: d 1 = 4 kW.m −3 .…”

Section: Figure 4 Acquisition Conditions For the Temperature Fieldsmentioning

confidence: 99%

A specific device for enhanced measurement of mechanical dissipation in specimens subjected to long‐term tensile tests in fatigue

Delpueyo

Balandraud

Grédiac

et al. 2017

Strain

View full text Add to dashboard Cite

This paper presents a calorimetric approach to the measurement of mechanical dissipation in specimens subjected to cyclic tensile tests. Mechanical dissipation, that is, the heat power produced by the material due to mechanical irreversibility, can potentially be deduced from the temperature changes captured on the specimen surface by infrared thermography. However, a difficulty arises for long-term cyclic tests: Results are easily skewed by any change in the specimen's environment. The problem is amplified by the fact that mechanical dissipation is in general small compared to the heat sources associated with thermomechanical couplings, making its estimation difficult. The paper proposes a simple procedure to extract a well-resolved estimation of mechanical dissipation by solving two key points specific to long-term cyclic tests: (a) the reduction of the parasitic effects associated with changes in the specimen's environment by using a specific device based on two references samples and (b) the choice of relevant thermal data acquisition parameters. A test is performed on a copper-based shape-memory alloy whose calorific response comprises three origins of heat sources: thermoelastic coupling, phase transformation, and mechanical irreversibility. The results obtained demonstrate the relevancy of the approach in extracting mechanical dissipation from the thermal response of the specimen subjected to long-term tensile tests in fatigue.

show abstract

Section: Figure 4 Acquisition Conditions For the Temperature Fieldsmentioning

confidence: 99%

A specific device for enhanced measurement of mechanical dissipation in specimens subjected to long‐term tensile tests in fatigue

Delpueyo

Balandraud

Grédiac

et al. 2017

Strain

View full text Add to dashboard Cite

show abstract

“…This well recognised result [1], in tandem with a suitable calibration, allows the surface distribution of principal stress sum to be determined from the component surface during excitation. However, the application of thermoelastic stress analysis methods to elevated frequency testing presents several particular experimental and image processing challenges which are rarely seen at the range of test frequencies achieved using servo-hydraulic test equipment.…”

Section: Introductionmentioning

confidence: 93%

Gas Turbine Blade Stress Analysis and Mode Shape Determination Using Thermoelastic Methods

Bäckman

Greene

2008

AMM

View full text Add to dashboard Cite

Abstract. The efficacy of thermoelastic stress analysis for use in the study of moderately curved gas turbine blades is considered over a frequency range of 68 Hz to 3.4 kHz. A selection of blades, both industrial examples and simplified planar laboratory specimens, are excited at their natural vibration frequencies using both electromagnetic shakers and piezoelectric stack actuators, in order to develop a cyclic displacement of the blade surface and hence a cyclic variation in surface stress condition. Results are shown using both snapshot array and rolling array infrared detector systems, and the data then used to generate maps of normalized principal surface stress sum, and hence the mode shapes of vibration, including the first four excitation modes.

show abstract

“…1) has been widely employed in the past in various modes to characterize and analyse the response of materials during cyclic mechanical loading. Thermomechanical coupling by LT or the so called Thermoelastic Stress Analysis (TSA) [3,8,15,16,[22][23][24][25], has been used to construct stress maps for both composite and metal materials under cyclic mechanical loading. Stress maps allow for the determination of the location of damage initiation and its subsequent evolution.…”

Section: Thermomechanical Couplingmentioning

confidence: 99%

On the fatigue response of a bonded repaired aerospace composite using thermography

Grammatikos

Kordatos

Matikas

et al. 2018

Composite Structures

View full text Add to dashboard Cite

A review of the general theory of thermoelastic stress analysis

Cited by 181 publications

References 20 publications

A specific device for enhanced measurement of mechanical dissipation in specimens subjected to long‐term tensile tests in fatigue

A specific device for enhanced measurement of mechanical dissipation in specimens subjected to long‐term tensile tests in fatigue

Gas Turbine Blade Stress Analysis and Mode Shape Determination Using Thermoelastic Methods

On the fatigue response of a bonded repaired aerospace composite using thermography

Contact Info

Product

Resources

About