Comparison between Models of Rock Discontinuity Strength and Deformation

In order to effectively assess the concrete strength and deformation property under sea water erosion environment, concrete stress and strain curve was researched with the number of wet and dry cycle of 0 times, 10 times , 20 times, 30 times, 40 times, 50 times and 60 times based on the large-scale static and dynamic stiffness servo test set. The stress - strain curves of concrete was tested for the lateral pressure 10.8MPa, 14.4MPa, and 18.8MPa at different dry-wet cycles, The failure modes and superficial cracking characteristics of specimens are reported at different dry-wet cycles. Concrete elastic modulus and compressive strength were researched. Based on concrete mechanical theory , the classic Kufer-Gerstle strength criteria of concrete was used, a large number of test samples of multivariate data were nonlinear regressed, a biaxial concrete strength criterion was established taking into account the stress ratio and the number of dry-wet cycles.

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Dynamic evolution of shear rate-dependent behavior of rock discontinuity under shearing condition

Journal of Central South University ◽

10.1007/s11771-021-4736-4 ◽

2021 ◽

Vol 28 (6) ◽

pp. 1875-1887

Author(s):

Lin-lin Gu ◽

Zhen Wang ◽

Feng Zhang ◽

Fei Gao ◽

Xiao Wang

Keyword(s):

Shear Rate ◽

Dynamic Evolution ◽

Rock Discontinuity ◽

Rate Dependent ◽

Dependent Behavior

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Strength and deformation of bending normal sections made of concrete frame structure

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1083/1/012034 ◽

2021 ◽

Vol 1083 (1) ◽

pp. 012034

Author(s):

D R Mailyan ◽

G V Nesvetaev ◽

Yu I Koryanova ◽

E V Lesniak

Keyword(s):

Frame Structure ◽

Concrete Frame ◽

Strength And Deformation

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The vibration of electrified water drops

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1971.0082 ◽

1971 ◽

Vol 322 (1551) ◽

pp. 523-534 ◽

Cited By ~ 20

Keyword(s):

Electric Field ◽

Electric Fields ◽

Axial Ratio ◽

Uniform Electric Field ◽

Interferometric Technique ◽

Photographic Analysis ◽

Wide Range ◽

Water Drops ◽

Strength And Deformation ◽

A Charge

Pressure has been used as the principal parameter in calculations of the fundamental vibrational frequencies of spherical drops of radius R , density ρ, and surface tension T carrying a charge Q or uncharged spheroidal drops of axial ratio a / b situated in a uniform electric field of strength E . Freely vibrating charged drops have a frequency f = f 0 ( 1 - Q 2 /16π R 3 T ) ½ , as shown previously by Rayleigh (1882) using energy considerations; f 0 is the vibrational frequency of non-electrified drops (Rayleigh 1879). The fundamental frequency of an uncharged drop in an electric field will decrease with increasing field strength and deformation a / b and will equal zero when E ( R )/ T ) ½ = 1.625 and a / b = 1.86; these critical values correspond to the disintegration conditions derived by Taylor (1964). An interferometric technique involving a laser confirmed the accuracy of the calculations concerned with charged drops. The vibration of water drops of radius around 2 mm was studied over a wide range of temperatures as they fell through electric fields either by suspending them in a vertical wind tunnel or allowing them to fall between a pair of vertical electrodes. Photographic analysis of the vibrations revealed good agreement between theory and experiment over the entire range of conditions studied even though the larger drops were not accurately spheroidal and the amplitude of the vibrations was large.

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Investigation of the adhesion strength and deformation behaviour of in situ fabricated NbC coatings by scratch testing

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2016.05.004 ◽

2016 ◽

Vol 299 ◽

pp. 135-142 ◽

Cited By ~ 27

Author(s):

Xiaolong Cai ◽

Yunhua Xu ◽

Nana Zhao ◽

Lisheng Zhong ◽

Ziyuan Zhao ◽

...

Keyword(s):

Adhesion Strength ◽

Deformation Behaviour ◽

Scratch Testing ◽

Strength And Deformation

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Analysis Study on Axial Force in Bolted Connection under Fatigue Load

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.858.57 ◽

2016 ◽

Vol 858 ◽

pp. 57-60

Author(s):

Kwan Sik Park ◽

Jae Hyuk So ◽

Keun Yeong Oh ◽

Kang Min Lee

Keyword(s):

Steel Structure ◽

High Strength ◽

Clamping Force ◽

Fatigue Load ◽

Element Analysis ◽

Bolted Connection ◽

The Finite Element Analysis ◽

Strength And Deformation ◽

Main Factor ◽

Ansys Workbench

High-strength bolted connection is widely used for steel structure construction. Because high-strength bolted connection has simple constructability and structural qualification. Especially friction type with high-strength bolted connection has high stiffness and fatigue strength. At this time, initial clamping force is one of main factor to affect the strength and deformation behavior of connection. Therefore, the objective of this study is to investigate reduction of initial clamping force in high-strength bolted connection under fatigue load. And the parameter of this study is the size of the bolt and 3 types of initial clamping force. The analysis is used the finite element analysis program ANSYS Workbench.

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