Thermally induced stress and strain in YAG/sapphire single-crystal composites

2005 ◽  
Author(s):  
Huai-Chuan Lee ◽  
Helmuth Meissner ◽  
Oliver Meissner
Keyword(s):  
Single Crystal ◽  
Stress And Strain ◽  
Thermally Induced ◽  
Induced Stress ◽  
Sapphire Single Crystal

scholarly journals The risks of long-term re-injection in supercritical geothermal systems

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Francesco Parisio ◽  
Victor Vilarrasa ◽  
Wenqing Wang ◽  
Olaf Kolditz ◽  
Thomas Nagel
Keyword(s):  
Cold Water ◽  
Numerical Study ◽  
Geothermal System ◽  
Stress And Strain ◽  
Geothermal Systems ◽  
Thermally Induced ◽  
The Road ◽  
Numerical Studies ◽  
Induced Stress

Abstract Supercritical geothermal systems are appealing sources of sustainable and carbon-free energy located in volcanic areas. Recent successes in drilling and exploration have opened new possibilities and spiked interest in this technology. Experimental and numerical studies have also confirmed the feasibility of creating fluid conducting fractures in sedimentary and crystalline rocks at high temperature, paving the road towards Enhanced Supercritical Geothermal Systems. Despite their attractiveness, several important questions regarding safe exploitation remain open. We dedicate this manuscript to the first thermo-hydro-mechanical numerical study of a doublet geothermal system in supercritical conditions. Here we show that thermally-induced stress and strain effects dominate the geomechanical response of supercritical systems compared to pore pressure-related instabilities, and greatly enhance seismicity during cold water re-injection. This finding has important consequences in the design of Supercritical Geothermal Systems.

Solid-state dynamics and single-crystal to single-crystal structural transformations in octakis(3-chloropropyl)octasilsesquioxane and octavinyloctasilsesquioxane

2017 ◽  
Vol 19 (40) ◽  
pp. 27516-27529 ◽  
Author(s):  
A. Kowalewska ◽  
M. Nowacka ◽  
M. Włodarska ◽  
B. Zgardzińska ◽  
R. Zaleski ◽  
...  
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Structural Transformations ◽  
Crystal Lattices ◽  
Thermally Induced ◽  
Crystal Structural

Thermally induced formation of symmetric crystal lattices in functional POSS proceeds via different mechanisms and results in unique reversible phenomena.

Influence of gas flow on thermal field and stress during growth of sapphire single crystal using Kyropoulos method

Rare Metals ◽  
2006 ◽  
Vol 25 (6) ◽  
pp. 260-266 ◽  
Author(s):  
J LI ◽  
X SU ◽  
M NA ◽  
H YANG ◽  
J LI ◽  
...  
Keyword(s):  
Single Crystal ◽  
Gas Flow ◽  
Thermal Field ◽  
Sapphire Single Crystal ◽  
Kyropoulos Method

A phenomenological model for thermally-induced hysteresis in polycrystalline shape memory alloys with internal loops

2021 ◽  
pp. 1045389X2110482
Author(s):  
Yuxiang Han ◽  
Haoyuan Du ◽  
Linxiang Wang ◽  
Roderick Melnik
Keyword(s):  
Shape Memory Alloys ◽  
Single Crystal ◽  
Shape Memory ◽  
Phenomenological Model ◽  
Landau Theory ◽  
Thermally Induced ◽  
First Order ◽  
Proposed Model ◽  
Crystal Model ◽  
Hysteretic Response

In the current study, a 1-D phenomenological model is constructed to capture the temperature-induced hysteretic response in polycrystalline shape memory alloys (SMAs). The martensitic and austenitic transformations are regarded as the first-order transitions. A differential single-crystal model is formulated on the basis of Landau theory. It is assumed that the transformation temperatures follow the normal distribution among the grains due to the anisotropic stress field developed in the material. The polycrystalline hysteretic response is expressed as the integration of single-crystal responses. Besides, the prediction strategy for incomplete transitions is presented, and the first-order reversal curves are obtained via density reassignment. The proposed model is numerically implemented for validation. Comparisons between the modeling results and the experimental ones demonstrate the capability of the proposed model in addressing the hysteresis in thermally-induced phase transformations.

Measurement of Stress and Strain of Single-Crystal-Silicon Thin Film during On-Chip Tensile Test

1999 ◽  
Vol 119 (2) ◽  
pp. 67-72 ◽  
Author(s):  
Taeko Ando ◽  
Tetsuo Yoshioka ◽  
Mitsuhiro Shikida ◽  
Kazuo Sato ◽  
Tatsuo Kawabata
Keyword(s):  
Thin Film ◽  
Tensile Test ◽  
Single Crystal ◽  
Single Crystal Silicon ◽  
Stress And Strain ◽  
Silicon Thin Film ◽  
Crystal Silicon ◽  
On Chip
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