Transport and relaxation properties of superfluid 3He. I. Kinetic equation and Bogoliubov quasiparticle relaxation rate

1978 ◽  
Vol 32 (1-2) ◽  
pp. 19-37 ◽  
Author(s):  
D. Einzel ◽  
P. W�lfle
Keyword(s):  
Kinetic Equation ◽  
Relaxation Rate ◽  
Superfluid 3He ◽  
Relaxation Properties ◽  
Quasiparticle Relaxation

scholarly journals Experimental Study of the Relaxation Properties of Carbon Fiber Cloth

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3603
Author(s):  
Qiang Wang ◽  
Hua-Lin Song ◽  
Chun-Ling Lu ◽  
Wan-Xu Zhu ◽  
Jia-Zhu Huang
Keyword(s):  
Carbon Fiber ◽  
Relaxation Rate ◽  
Calculation Model ◽  
Test Results ◽  
Relaxation Properties ◽  
Reinforced Plastics ◽  
Axial Tension ◽  
Carbon Fiber Cloth ◽  
Relaxation Loss ◽  
Rate Calculation

In this study, a new method was proposed to study the relaxation properties of carbon fiber reinforced plastics (CFRP) fabric under axial tension. Under the condition of constant temperature and humidity, six groups of 168 h stress relaxation tests were conducted. Considering the influence of the prestress level, the size of CFRP cloth, and the surface coating of CFRP cloth on the relaxation performance, the measures to reduce the relaxation loss were proposed. The relaxation rate calculation model was established based on the test results of the authors and other scholars and was validated through comparisons with the test results. The results indicate that the relaxation rate of CFRP cloth was between 1.92% and 6.1%. When the prestress level was smaller than 0.3 fu, the relaxation rate of CFRP cloth decreased with the increase of prestress level. When the prestress level was greater than 0.3 fu, the relaxation rate increased with the increase of the prestress level. Under the same conditions, the relaxation rate of the CFRP specimens coated with glue was smaller than the uncoated samples by 3.21–6.28%. The calculation model could well estimate the relaxation rate of CFRP cloth.

Tensile and Tensile Stress Relaxation Properties of Wool/Cotton Plied Yarns

1997 ◽  
Vol 67 (5) ◽  
pp. 378-385 ◽  
Author(s):  
Mari Inoue ◽  
Masako Niwa
Keyword(s):  
Stress Relaxation ◽  
Relative Humidity ◽  
Tensile Stress ◽  
Relaxation Rate ◽  
High Water ◽  
Absorption Properties ◽  
Relaxation Properties ◽  
Fabric Hand ◽  
High Water Absorption ◽  
Basic Objective

The basic objective of this work is to understand the effects of humidity and the ratio of wool and cotton fiber on the initial tensile and tensile stress relaxation properties of plied yarns. These low strain properties relate directly to the fabric hand, appearance, and formability of clothing. We have found that wool/cotton plied yarns have high hygroscopicity, high water absorption properties, and a low stress relaxation rate at high relative humidity. Also, we have adapted the power law to provide a relation between wool fiber content and the values of tensile resilience and stress relaxation rate. Their values are then estimated from the values of tensile resilience and stress relaxation rate of the constituent fibers and the blend composition.

Study on Stress Relaxation Properties of GFRP Rebars/Bolts

2010 ◽  
Vol 168-170 ◽  
pp. 1821-1826
Author(s):  
Guo Qing Yuan ◽  
Guo Hua Dong ◽  
Jian Ma
Keyword(s):  
Stress Relaxation ◽  
Relaxation Rate ◽  
Construction Projects ◽  
Test Time ◽  
Relaxation Properties ◽  
Reinforced Plastics ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Plastics ◽  
Superior Corrosion Resistance ◽  
Gfrp Rebars

Glass fiber reinforced plastics (GFRP) rebars / bolts are more and more being applied in construction projects with its superior corrosion resistance. To improve the economical efficiency of their application it is very significant to develop the prestressed GFRP rebars/bolts structure system. Therefore it is very valuable to probe the stress relaxation properties of GFRP rebars/bolts. With an innovation ends anchoring method for stress relaxation specimens of GFRP rebars/bolts, the stress relaxation properties has been tested in this paper. Results show that the relaxation rate of GFRP rebars/bolts increases with the initial stress increasing and with test time prolonging. It is increasing more rapidly at the beginning stage and it becomes slow after 24 hours. The relaxation law of GFRP rebars/bolts is similar to the law of CFRP and AFRP rebars/bolts. The relation between the relaxation rate and the logarithm of test time in hour follows also better linear law. The relaxation rate of GFRP rebars/bolts is bigger than CFRP ones and smaller than AFRP ones. The mechanical properties do not change obviously after 120h relaxation test.

GAUGE GROUP AND PHASES OF SUPERFLUID 3He

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-50-C6-52
Author(s):  
V. L. Golo ◽  
M. I. Monastyrsky
Keyword(s):  
Gauge Group ◽  
Superfluid 3He

MOBILITIES OF IONS IN NORMAL AND SUPERFLUID 3He

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-1290-C6-1294
Author(s):  
YDM-Group
Keyword(s):  
Superfluid 3He

Magnetic resonance image attributes of the bovine ovarian follicle antrum during development and regression

Reproduction ◽  
2000 ◽  
pp. 311-323 ◽  
Author(s):  
JL Hilton ◽  
GE Sarty ◽  
GP Adams ◽  
RA Pierson
Keyword(s):  
Magnetic Resonance ◽  
Relaxation Rate ◽  
Follicular Fluid ◽  
Magnetic Resonance Image ◽  
Follicular Development ◽  
Physiological Status ◽  
Proton Density ◽  
Dominant Follicle ◽  
Rate Heterogeneity ◽  
Pixel Value

The magnetic resonance images and maps of bovine ovaries acquired at defined phases of follicular development and regression were studied to determine whether magnetic resonance image attributes of the follicular antrum reflect the physiological status of dominant and subordinate ovarian follicles. Ovariectomies were performed at day 3 of wave one, day 6 of wave one, day 1 of wave two and at >/= day 17 after ovulation. The timings of ovariectomies were selected to acquire growing, early static, late static and regressing follicles of the first wave and preovulatory follicles of the ovulatory wave. Pre-selection and subordinate follicles were also available for analysis. Serum samples were taken on the day of ovariectomy and follicular fluid samples were taken after imaging. Numerical pixel value and pixel heterogeneity in a spot representing approximately 95% of the follicular antrum were quantified in T(1)- and T(2)-weighted images. T(1) and T(2) relaxation rates (T(1) and T(2)), proton density, apparent diffusion coefficients and their heterogeneities were determined from the computed magnetic resonance maps. The antra of early atretic dominant follicles showed higher T(2)-weighted mean pixel value (P < 0.008) and heterogeneity (P < 0. 01) and lower T(2) heterogeneity (P < 0.008) than growing follicles. Subordinate follicles in the presence of a preovulatory dominant follicle had higher T(1), T(1) heterogeneity, proton density, proton density heterogeneity, and lower mean pixel value in T(1)-weighted images than subordinate follicles of the anovulatory wave (P < 0.04). T(1) relaxation rate heterogeneity and proton density heterogeneity were positively correlated with follicular fluid oestradiol concentration (r = 0.4 and 0.3; P < 0.04). T(2) relaxation rate heterogeneity was positively correlated with follicular fluid progesterone concentration (r = 0.4; P < 0.008). Quantitative differences in magnetic resonance image attributes of the antrum observed among phases of follicular development and regression coincided with changes in the ability of the dominant follicle to produce steroid hormones and ovulate, and thus were indicative of physiological status and follicular health.

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