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strain gauges of every measuring point are listed in Table 2. Table 2 Strain actually induced by stress relief Through confining pressure calibration test, the elastic modulus and Poisson ratio of rock mass were measured. According to the strain, elastic modulus and Poisson ratio, the in situ stress values of every measuring point were obtained. In order to reduce error, F-test was adopted......
on energy method. The result show that under principal stress rotation, there exists a threshold cyclic stress ratio in the intact soft clay. When the cyclic stress ratio is smaller than the threshold value... cyclic number line due to the structural collapse of soil. Meanwhile the modulus decreases in a sharp-steady-sharp way, and the lower the frequency or the larger the cyclic stress ratio is, the faster......
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. Then, the calculation formulas were verified by rolling forces of other sizes and passes. The results show that force of horizontal roll decreases with the increase of ratio of elongation as well as the force of vertical roll increases in the same area ratio. Rolling force of the middle position of horizontal roller converges to a stable value with the reducing of flange’s area. Vertical rolling force......
of CrN layer between the Cr2O3 layer and substrate can effectively decrease the internal stress level of the coating.With increasing the thickness ratio of CrN vs Cr2O3 layer,the surface roughness...Effects of the Thickness Ratio of CrN vs Cr2O3 Layer on the Properties of Double-layered CrN/Cr2O3 Coatings Deposited by Arc Ion PlatingChang-Ming Shi,Tie-Gang Wang,Zhi-Liang Pei,Jun Gong,Chao......
, Changsha 410004, China;3. School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China)Abstract:the relationships among compression ratio and stress, compression... of stress increases nonlinearly and residual oil rate decreases with the increase of compression ratio. Lower residual oil of cake was obtained by pressing gently and frequently. Curve fitting on both......
J. Cent. South Univ. Technol. (2008) 15: 786-790 DOI: 10.1007/s11771-008-0145-1 Effects of temperature and initial molar ratio of Na2O to Al2O3 on agglomeration of fine Al(OH)3 seed in synthetic... particle size analyzer and scanning electron microscopy, the influences of temperature and initial molar ratio of Na2O to Al2O3 (αK) on agglomeration of fine seed in Bayer process were investigated......
J. Cent. South Univ. (2020) 27: 963-972 DOI: https://doi.org/10.1007/s11771-020-4344-8 Dynamic response and failure of rock in initial gradient stress field under stress wave loading WENG Lei(翁磊)1... GmbH Germany, part of Springer Nature 2020 Abstract: Once an opening is created in deep underground, the stresses surrounding the opening will be redistributed, inducing a gradient stress field......
for the sheet metal formability. The effect of equipment and tooling parameters results in complex deformation mechanism. Existence of thickness variation in the formed part may cause stress concentration and may lead to acceleration of damage. Using TAGUCHI’s signal-to-noise ratio, it is determined that the die shoulder radius has major influence followed by blank holder force and punch nose radius......
to show the corrosion resistance of materials in this corrodent [15]. The smaller the ratio, generally, the higher the stress corrosion susceptibility is. The capabilities usually include the ultimate... Stress corrosion cracking susceptibility of 7A52 aluminum alloy ZHAO Jun-jun(赵军军), WANG Wei-xin(王卫欣), CAI Zhi-hai(蔡志海), ZHANG Ping(张 平) Institute of Remanufacture Engineering, Academy......
