mechanical stresses
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2022 ◽  
Vol 24 (1) ◽  
Author(s):  
Zachary Brooks ◽  
Kanghyun Kim ◽  
Kai Zhao ◽  
Tarun Goswami ◽  
Saber Hussain ◽  
...  

2022 ◽  
Vol 92 (3) ◽  
pp. 457
Author(s):  
А.Н. Паньчак ◽  
М.З. Шварц

In photovoltaic converters of concentrated sunlight, the thermal flow is directed from the photoactive region (p-n junction) to a heat-spreading basement through the substrate. The heat sink transfers the excess thermal to the environment by convection or cooled by a liquid carrier. Reducing the thickness of the substrate makes it possible to reduce the thermal resistance of the crystal and lower the operating temperature of the photoactive region. However, in this case, the mechanical stresses in it increase. This work discusses the balance between the mechanical strength of the sample and the decrease in its operating temperature.


2022 ◽  
Vol 2155 (1) ◽  
pp. 012005
Author(s):  
A S Larionov ◽  
A S Dikov ◽  
E A Zhakanbaev

Abstract The materials of research the structure and morphology of the tantalum coating on the surface of the NiTi alloy in this work presents. Tantalum was deposited by the DC - magnetron sputtering method. The influence of the energy supplied to the magnetron on the formation of the Ta-coating is shown.Changes in the structure of the coating at different stages of its formation are shown.It was found that with a significant decrease in the energy supplied to the magnetron, tantalum is deposited more uniformly. Besides the gradient of mechanical stresses in the coating is reduced.


2021 ◽  
Author(s):  
Yingxuan Ma ◽  
Colleen P MacMillan ◽  
Lisanne de Vries ◽  
Shawn D Mansfield ◽  
Pengfei Hao ◽  
...  

2021 ◽  
Vol 2144 (1) ◽  
pp. 012008
Author(s):  
A F Banishev

Abstract The mechanoluminescent materials attract increasing attention of scientists due to their capability of visualizing the mechanical stresses and deformations experienced by them. The deformations of materials arising under the action of powerful laser pulses were studied. The composite mechanoluminescent materials based on the polymer and phosphor powder were used for visualization and registration of deformation evolution dynamics. The mechanoluminescent materials were deposited on the surface of the materials under study. It has been shown that the spatial distribution of glow intensity of the mechanoluminescent layer and the rate of its change make possible judging the value and rate of material deformation under laser pulses.


2021 ◽  
Vol 12 ◽  
Author(s):  
Marcus G. Heisler

Over the last decade or so important progress has been made in identifying and understanding a set of patterning mechanisms that have the potential to explain many aspects of plant morphology. These include the feedback loop between mechanical stresses and interphase microtubules, the regulation of plant cell polarity and the role of adaxial and abaxial cell type boundaries. What is perhaps most intriguing is how these mechanisms integrate in a combinatorial manner that provides a means to generate a large variety of commonly seen plant morphologies. Here, I review our current understanding of these mechanisms and discuss the links between them.


2021 ◽  
Vol 2127 (1) ◽  
pp. 012036
Author(s):  
A V Fedorov ◽  
V A Bychenok ◽  
I V Berkutov ◽  
I E Alifanova ◽  
A E Khoshev

Abstract The work is devoted to the ultrasonic method of controlling mechanical stresses using ultrasonic head waves. The factors that contribute to the result of measurements of mechanical stresses include: the propagation velocity of the head ultrasonic wave, the temperature of the environment and the object of control, the coefficients of acoustoelastic and thermoacoustic coupling, parameters of the optical-acoustic transducer. The contribution of each of these factors to the results of measurements of mechanical stresses is assessed. A technique for assessing the uncertainty of measurements of mechanical stresses by the ultrasonic method using head waves has been developed.


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