Experimental research on deterioration of mechanical properties of carbonate rocks under acidified conditions

2020 ◽  
Vol 185 ◽  
pp. 106612
Author(s):  
Hao Zhang ◽  
Ying Zhong ◽  
Jiang Zhang ◽  
Yongchun Zhang ◽  
Jianchao Kuang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Experimental Research ◽  
Carbonate Rocks

Experimental Research on Strength of GFRP Bars in Shield Engineering

2014 ◽  
Vol 1020 ◽  
pp. 308-313
Author(s):  
Jun Liu ◽  
Hong Zhou ◽  
Hai Jun Yuan ◽  
Jing Fan Li
Keyword(s):  
Mechanical Properties ◽  
Experimental Research ◽  
Security Risks ◽  
Steel Reinforced Concrete ◽  
Retaining Structure ◽  
Supporting Structure ◽  
Gfrp Bars ◽  
The World ◽  
Structure Strength ◽  
Subway Stations

Subway stations or shield wells are often built using steel reinforced concrete supporting structure materials. These concrete retaining structure materials must be destroyed before launching and receiving of shield, so, some security risks may arise during destroying, and time limit for project may be longer, and the structure strength may be weakened; there are the same problems in crossing the existing subsidiary structure. In the supporting structure, concrete supporting structure materials have been partially substituted by GFRP bars in shield engineering in the world. In order to study the mechanical properties of GFRP bars deeply, experimental research on strength of GFRP bars have been made, and some relation shapes between stress and shear strength have been discussed; all of these are expected to make some basis for the design of GFRP concrete in shield engineering.

Experimental Research on Mechanical Calculation of Fascine Object’s Underwater Falling

2011 ◽  
Vol 84-85 ◽  
pp. 204-208
Author(s):  
Jie Shi ◽  
Xiao Lei Zhang ◽  
Su Ting Yang
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Experimental Research ◽  
Yellow River ◽  
The Yellow River ◽  
Mechanical Calculation ◽  
River Bed ◽  
Calculation Results

Fascine objects can be applied in the process of emergency rescues in the Middle and Lower reaches of the Yellow River. Because fascine objects can improve the efficiency of rushing to deal with an emergency, adapt to changes in river bed conditions better, resist the erosion of water slide on riverbank and buttress and prevent the collapse of the embankment, they are applicable to rescuing grave dangerous situations such as river closure, advancing construction dams in waters, closing up levee breaches and so on. Based on the experimental study, the authors analyze the mechanical calculation results of fascine object’s underwater falling, and draw the relevant mechanical properties of fascine object’s underwater falling.

Experimental research on rheological and mechanical properties of nano silica sol grout

2019 ◽  
Vol 91 (1) ◽  
pp. 178-188 ◽  
Author(s):  
Pengcheng Wang ◽  
Shuchen Li ◽  
Yang Li ◽  
Xianda Feng ◽  
Can Xie ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Experimental Research ◽  
Silica Sol ◽  
Nano Silica

Combined Isothermal Drawing of Axissymmetrical Parts Made out of Anisotropic Materials in Mode of Short-Time Creeping

2016 ◽  
Vol 684 ◽  
pp. 152-164
Author(s):  
Sergey Sergeevich Yakovlev ◽  
Olga Vasilievna Pilipenko ◽  
Andrey Aleksandrovich Pasynkov
Keyword(s):  
Mechanical Properties ◽  
Experimental Research ◽  
Anisotropic Material ◽  
Stress Condition ◽  
Anisotropic Body ◽  
Anisotropic Materials ◽  
Age Hardening ◽  
Technological Parameters ◽  
Short Time ◽  
Anisotropy Of Mechanical Properties

Shown are results of theoretical and experimental research of force modes and limit possibilities of the first and subsequent operations of combined isothermal drawing of axisymmetric parts made out of anisotropic materials through conic and radial matrixes in the mode of short-time creeping. Studied was straining of anisotropic material under conditions of short-time creeping. We ignore the elastic components of strain. We introduced potential straining speeds for an anisotropic body under conditions of short-time creeping. Found was the effect of technological parameters, anisotropy of mechanical properties, and of age-hardening upon the stress condition, the force modes of the operation, and upon the design margin of strain during the first and subsequent operations of combined drawing. Experimental research was carried out for the force conditions and possible limits of straining during the first and second operations of combined isothermal drawing with convex-face and conic matrices in the mode of short-time creeping. Comparing the results of theoretical and experimental research for force modes and strain limits during the first and subsequent operations of combined drawing has shown their satisfactory similarity (up to 5% - 10%).

Mechanical Properties and Bursting Liability Experimental Research of Roof in East Mine of Kouzi

2014 ◽  
Vol 926-930 ◽  
pp. 4101-4104
Author(s):  
Bo Wang
Keyword(s):  
Mechanical Properties ◽  
Experimental Research ◽  
Mathematical Analysis ◽  
Theoretical Basis ◽  
Roof Rock ◽  
Water Injection ◽  
Testing Machine ◽  
Power Equipment ◽  
Roof Strata ◽  
Safe Mining

In order to understand bursting liability and related mechanical properties of roof mudstone in east mine of Kouzi, SANS material mechanics testing machine is utilized as power equipment, bursting liability and related mechanical properties of roof mudstone has been tested, and MATLAB is exploited to analyze mathematical analysis for results. Experimental results showed that roof rock with strong bursting liability in east mine of Kouzi, its relevant safety should be improved; we can adopt the way of water injection into roof strata to change its mechanical properties, the purpose of safe mining is achieved. Research conclusion provides theoretical basis for safety mining in deep Yongchuan mine in east of Kouzi.

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