Design for Thermal Stresses

Barron, Randall F.; Barron, Brian R.

doi:10.1002/9781118093184

Cited by 48 publications

(38 citation statements)

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“…The mechanical work transfer rate or, equivalently, the volume-change work per unit volume may be defined asẇ = −σ ∂ε ∂t (25), where σ and ε are the total axial stress (i.e. including both mechanical and thermal components) and strain, respec-tively.…”

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confidence: 99%

Thermoacoustics of solids: A pathway to solid state engines and refrigerators

Hao

Scalo

Sen

et al. 2018

Journal of Applied Physics

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Thermoacoustic oscillations have been one of the most exciting discoveries of the physics of fluids in the 19th century. Since its inception, scientists have formulated a comprehensive theoretical explanation of the basic phenomenon which has later found several practical applications to engineering devices.To-date, all studies have concentrated on the thermoacoustics of fluid media where this fascinating mechanism was exclusively believed to exist. Our study shows theoretical and numerical evidence of the existence of thermoacoustic instabilities in solid media. Although the underlying physical mechanism is analogous to its counterpart in fluids, the theoretical framework highlights relevant differences that have important implications on the ability to trigger and sustain the thermoacoustic response. This mechanism could pave the way to the development of highly robust and reliable solid-state thermoacoustic engines and refrigerators.

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confidence: 99%

Thermoacoustics of solids: A pathway to solid state engines and refrigerators

Hao

Scalo

Sen

et al. 2018

Journal of Applied Physics

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“…Then, one can measure the LB change of the OI caused by the DUT from optical intensity change passing through a linear polarizer aligned 0° and 45° from the vertical direction to the incident plane, as shown in Fig. 1a and supplement text S21718.…”

Section: Resultsmentioning

confidence: 99%

Temperature and microwave near field imaging by thermo-elastic optical indicator microscopy

Lee

Arakelyan

Friedman

2016

Sci Rep

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A high resolution imaging of the temperature and microwave near field can be a powerful tool for the non-destructive testing of materials and devices. However, it is presently a very challenging issue due to the lack of a practical measurement pathway. In this work, we propose and demonstrate experimentally a practical method resolving the issue by using a conventional CCD-based optical indicator microscope system. The present method utilizes the heat caused by an interaction between the material and an electromagnetic wave, and visualizes the heat source distribution from the measured photoelastic images. By using a slide glass coated by a metal thin film as the indicator, we obtain optically resolved temperature, electric, and magnetic microwave near field images selectively with a comparable sensitivity, response time, and bandwidth of existing methods. The present method provides a practical way to characterize the thermal and electromagnetic properties of materials and devices under various environments.

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“…Bernoulli (1789) and Germain (1826, and earlier work) developed the first differential-equation-based theories for plate bending. Lagrange (1828) reviewed the prize that Germain won in 1811 for her work on elastic plate flexure, and, on realizing an error in the lumping of terms due to Germain's incorporation of an incorrect formula by Euler (1764), corrected it and produced the first complete flexure equation (see reviews by Todhunter and Pearson, 1886;Ventsel et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Open-source modular solutions for flexural isostasy: gFlex v1.0

Wickert

2016

Geosci. Model Dev.

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Abstract. Isostasy is one of the oldest and most widely applied concepts in the geosciences, but the geoscientific community lacks a coherent, easy-to-use tool to simulate flexure of a realistic (i.e., laterally heterogeneous) lithosphere under an arbitrary set of surface loads. Such a model is needed for studies of mountain building, sedimentary basin formation, glaciation, sea-level change, and other tectonic, geodynamic, and surface processes. Here I present gFlex (for GNU flexure), an open-source model that can produce analytical and finite difference solutions for lithospheric flexure in one (profile) and two (map view) dimensions. To simulate the flexural isostatic response to an imposed load, it can be used by itself or within GRASS GIS for better integration with field data. gFlex is also a component with the Community Surface Dynamics Modeling System (CSDMS) and Landlab modeling frameworks for coupling with a wide range of Earth-surfacerelated models, and can be coupled to additional models within Python scripts. As an example of this in-script coupling, I simulate the effects of spatially variable lithospheric thickness on a modeled Iceland ice cap. Finite difference solutions in gFlex can use any of five types of boundary conditions: 0-displacement, 0-slope (i.e., clamped); 0-slope, 0-shear; 0-moment, 0-shear (i.e., broken plate); mirror symmetry; and periodic. Typical calculations with gFlex require 1 s to ∼ 1 min on a personal laptop computer. These characteristics -multiple ways to run the model, multiple solution methods, multiple boundary conditions, and short compute time -make gFlex an effective tool for flexural isostatic modeling across the geosciences.

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Design for Thermal Stresses

Cited by 48 publications

References 0 publications

Thermoacoustics of solids: A pathway to solid state engines and refrigerators

Thermoacoustics of solids: A pathway to solid state engines and refrigerators

Temperature and microwave near field imaging by thermo-elastic optical indicator microscopy

Open-source modular solutions for flexural isostasy: gFlex v1.0

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