scholarly journals On the role of pre-existing, unhealed cracks on the bending strain response of Ag-clad (Bi,Pb)2Sr2Ca2Cu3Ox tapes

1997 ◽  
Vol 70 (8) ◽  
pp. 1034-1036 ◽  
Author(s):  
M. Polak ◽  
J. A. Parrell ◽  
A. A. Polyanskii ◽  
A. E. Pashitski ◽  
D. C. Larbalestier
Keyword(s):  
Strain Response ◽  
Bending Strain

Hydroelastic Response of a Mat-Like Floating Circular Plate Advancing in Waves: Analytical Solution

2004 ◽  
Author(s):  
Tetsuya Matsui
Keyword(s):  
Circular Plate ◽  
Strain Response ◽  
Forward Speed ◽  
Leading Order ◽  
Matching Method ◽  
Bending Strain ◽  
Speed Effect ◽  
Hydroelastic Response ◽  
Plate Geometry ◽  
Scattering And Radiation

The boundary-value problem is formulated to predict the hydroelastic response of a mat-like floating circular plate advancing slowly in waves. The potential flow theory is employed with low forward-speed assumption. The plate is modeled as an elastic plate with zero draught. This assumption allows the steady disturbance potential due to forward speed be neglected, simplifying considerably the problem. By applying the eigenfunction-expansion domain-matching method analytical solutions are derived for the scattering and radiation potentials up to the leading-order terms of the speed-dependent parts. Numerical results are presented for the typical plate geometry. It is shown that the forward-speed effect on the hydroelastic response, especially on the bending strain response, of the plate is significant.

Strain response in fibroblasts indicates a possible role of the Ca2+-dependent nuclear transcription factor NM1 in RNA synthesis

Cell Calcium ◽  
2011 ◽  
Vol 49 (4) ◽  
pp. 259-271 ◽  
Author(s):  
Thorsten Steinberg ◽  
Nelli Ziegler ◽  
Angel Alonso ◽  
Annette Kohl ◽  
Eva Müssig ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Rna Synthesis ◽  
Strain Response ◽  
Nuclear Transcription Factor

scholarly journals A Study on the Braided Fabrication of Fiber Bragg Grating Sensor

2020 ◽  
Author(s):  
joohyeon Lee
Keyword(s):  
Fiber Bragg Grating ◽  
Poisson Ratio ◽  
Bragg Grating ◽  
Strain Response ◽  
Stress Strain ◽  
Design Elements ◽  
Wrap Angle ◽  
Bragg Grating Sensor ◽  
Core Part

This study's objective was to propose the use of textile braiding manufacturing methods, thus facilitating the application of the high precision and accurate measurability of optical fiber Bragg grating sensors to various structures.The purpose of this study was to Combine 3d braid processing with the optical Bragg grating sensor's accurate metrology. Out of limits of the sensor's epoxy attachment methods, the textile braiding method can make applicable scope diversify. The braiding processing is capable of designing a 3D fabric module processing, multiple objective mechanical fiber arrangement, and material characteristics. Optical stress-strain response conditions were explored through the optimization of design elements between the Bragg grating sensor and braiding. For this study, Bragg grating sensors were located 75% apart from the fiber center. The sensor core structure is helical of 1.54 pitch. A polyurethane synthetic yarn was braided together with the sensor on the Weaving machine core part in a braiding.Prototyping results, a negative Poisson's ratio makes curled the braided Bragg grating sensor. The number of polyurethan string yarns has been conducted the role of wrap angle in braiding. The 12 strands condition showed an increase in double stress-strain response rate at a Poisson ratio of 1.3%, and 16 strands condition was found to affect the sensor with noise at a Poisson ratio of 1.5%. This study can suggest applying braid processing of the Bragg grating sensor, which is expected to create and develop a new monitoring sensor.

Modeling Texture, Twinning and Hardening Evolution during Deformation of Hexagonal Materials

2005 ◽  
Vol 495-497 ◽  
pp. 1001-1006 ◽  
Author(s):  
Carlos Tomé ◽  
George C. Kaschner
Keyword(s):  
Strain Rate ◽  
Texture Evolution ◽  
Deformation Texture ◽  
Strain Response ◽  
Stress Strain ◽  
Critical Stresses ◽  
Loading Direction ◽  
Hexagonal Materials

Hexagonal materials deform plastically by activating diverse slip and twinning modes. The activation of such modes depends on their relative critical stresses, function of temperature and strain rate, and the orientation of the crystals with respect to the loading direction. For a constitutive description of these materials to be reliable, it has to account for texture evolution associated with twin reorientation, and for the effect of the twin barriers on dislocation propagation and on the stress-strain response. In this work we introduce a model for twinning which accounts explicitly for the composite character of the grain, formed by a matrix with embedded twin lamellae which evolve with deformation. Texture evolution takes place through reorientation due to slip and twinning. The role of the twins as barriers to dislocations is explicitly incorporated into the hardening description via a directional Hall-Petch mechanism. We apply this model to the interpretation of compression experiments both, monotonic and changing the loading direction, done in rolled Zr at 76K.

scholarly journals A Study on the Braided Fabrication of Fiber Bragg Grating Sensor

2020 ◽  
Author(s):  
Lee Joohyeon
Keyword(s):  
Fiber Bragg Grating ◽  
Poisson Ratio ◽  
Bragg Grating ◽  
Strain Response ◽  
Stress Strain ◽  
Design Elements ◽  
Wrap Angle ◽  
Bragg Grating Sensor ◽  
Core Part

This study's objective was to propose the use of textile braiding manufacturing methods, thus facilitating the application of the high precision and accurate measurability of optical fiber Bragg grating sensors to various structures. The purpose of this study was to Combine 3d braid processing with the optical Bragg grating sensor's accurate metrology. Out of limits of the sensor's epoxy attachment methods, the textile braiding method can make applicable scope diversify. The braiding processing is capable of designing a 3D fabric module processing, multiple objective mechanical fiber arrangement, and material characteristics. Optical stress-strain response conditions were explored through the optimization of design elements between the Bragg grating sensor and braiding. For this study, Bragg grating sensors were located 75% apart from the fiber center. The sensor core structure is helical of 1.54 pitch. A polyurethane synthetic yarn was braided together with the sensor on the Weaving machine core part in a braiding. Prototyping results, a negative Poisson's ratio makes curled the braided Bragg grating sensor. The number of polyurethane string yarns has been conducted the role of wrap angle in braiding. The 12 strands condition showed an increase in double stress-strain response rate at a Poisson ratio of 1.3%, and 16 strands condition was found to affect the sensor with noise at a Poisson ratio of 1.5%. This study can suggest applying braid processing of the Bragg grating sensor, which is expected to create and develop a new monitoring sensor.

scholarly journals Effects of Composite Warm Mix Additive (CAR) on the Physical and Rheological Performance of Bitumen and the Pavement Performance of Its Concrete

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3916
Author(s):  
Jizhe Zhang ◽  
Peizhao Li ◽  
Changjun Sun ◽  
Ming Liang ◽  
Yuanyuan Li ◽  
...  
Keyword(s):  
Cationic Surfactants ◽  
Warm Mix Asphalt ◽  
Organic Additive ◽  
Pavement Performance ◽  
Bituminous Mixtures ◽  
Performance Grade ◽  
Bending Strain ◽  
Temperature Performance ◽  
Bituminous Concrete

Warm mix asphalt received increasing attention in recent years, and this technology aims to increase the fluidity of bitumen in the process of mixing and construction. To characterize the physical and rheological properties of bitumen and the pavement performance of bituminous mixtures, it was modified by a composite additive Rediset. Rediset consists of both the cationic surfactants and organic additive-based rheology modifiers. Commonly used materials such as Pen 60/80 bitumen and bituminous concrete (AC-20) were selected. The results show that Rediset can improve the penetration and softening point of the bitumen, making the bitumen stiffer and harder. All Rediset-modified bituminous concretes are in the same low-temperature performance grade (PG) as the bitumen without Rediset. Although Rediset can decrease the rutting and crack resistance of Rediset-modified bituminous concrete, all the Rediset-modified bituminous concrete with less than 2% Rediset still satisfied the requirement of the maximum bending strain being higher than 2000 με, and the dynamic stability of Rediset-modified bituminous concrete with 3% Rediset was still higher than 1000 cycles/mm. The cationic surfactants in the Rediset can play the role of an anti-stripping agent and improve the adhesion between the interfaces of the aggregate and bituminous binder, which enhances the moisture resistance of Rediset-modified bituminous concrete.

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