Research on mechanical properties of gneissic granite under real-time temperature

2016 ◽  
pp. 135-142
Author(s):  
X Li ◽  
D Wu ◽  
X Zhang ◽  
H Deng
Keyword(s):  
Mechanical Properties ◽  
Real Time ◽  
Gneissic Granite

scholarly journals Comprehensive detection device and physical testing for mechanical properties of seabed sediments and shallow gas

2021 ◽  
Vol 2083 (2) ◽  
pp. 022105
Author(s):  
Zhe Yun Li ◽  
Qing Li
Keyword(s):  
Mechanical Properties ◽  
Real Time ◽  
Gas Separation ◽  
Sensor Placement ◽  
Gas Detection ◽  
Shallow Gas ◽  
Seabed Sediment ◽  
Transmission Part ◽  
Seabed Sediments ◽  
Water Gas

Abstract In this paper, a comprehensive detection device for the mechanical properties of seabed sediments and shallow gas is designed, which is mainly composed of the seabed sediment mechanical properties detection part, the shallow gas detection part and the ultrasonic wireless transmission part. The mud water gas separation structure of the shallow gas detection part separates the shallow gas from the mud water, and then the methane concentration in the shallow gas is measured by the non-dispersive infrared methane sensor, which realizes the collection of the submarine shallow gas and the automatic real-time monitoring of the concentration. The measurement of the mechanical properties of seabed sediments realizes the real-time measurement of the three parameters of cone resistance, sidewall friction and pore water pressure, which characterize the mechanical properties of seabed sediments, through strain-sensitive elements. The ultrasonic wireless data transmission part is mainly for the data detected by the mechanical properties of the seabed sediments to be wirelessly transmitted to the sensor placement room through the ultrasonic transducer across the mud-water-gas separation structure. Finally, the data measured by the two parts are transmitted to the mother ship through the cable located in the sensor placement room. The experimental results show that it has the ability to comprehensively detect the mechanical properties of seabed sediments and shallow gas, and has strong operability.

Real-time ultrasonic experiments and mechanical properties of soil and rock mixture during triaxial deformation

2015 ◽  
Vol 5 (4) ◽  
pp. 281-286 ◽  
Author(s):  
Y. Wang ◽  
X. Li ◽  
B. Zheng ◽  
B. Zhang ◽  
J. B. Wang
Keyword(s):  
Mechanical Properties ◽  
Real Time ◽  
Triaxial Deformation ◽  
Properties Of Soil

Mechanical properties of granite under real-time high temperature and three-dimensional stress

2020 ◽  
Vol 136 ◽  
pp. 104521
Author(s):  
Xiao Ma ◽  
Guiling Wang ◽  
Dawei Hu ◽  
Yanguang Liu ◽  
Hui Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Real Time ◽  
Three Dimensional

scholarly journals Simultaneous measurement of fluorescence, conversion and physical/mechanical properties for monitoring bulk and localized photopolymerization reactions in heterogeneous systems

RSC Advances ◽  
2016 ◽  
Vol 6 (47) ◽  
pp. 41275-41286 ◽  
Author(s):  
S. Medel ◽  
P. Bosch ◽  
I. Grabchev ◽  
P. K. Shah ◽  
J. Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Real Time ◽  
Storage Modulus ◽  
Simultaneous Measurement ◽  
Heterogeneous Systems ◽  
Polymerization Kinetics ◽  
Real Time Monitoring ◽  
The Real

An FT-NIR spectrometer, rheometer and fluorescence spectrophotometer were coupled for the real-time monitoring of polymerization reactions, allowing the simultaneous tracking of polymerization kinetics, storage modulus as well as fluorescence.

scholarly journals Influence of Real-Time Heating on Mechanical Behaviours of Rocks

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Bin Gu ◽  
Zhijun Wan ◽  
Yuan Zhang ◽  
Yangsheng Ma ◽  
Xiaodong Bernard Xu
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Real Time ◽  
Heating Temperature ◽  
Thermal Cracking ◽  
Effect Of Temperature ◽  
Rock Engineering ◽  
Mechanical Behaviours ◽  
Theoretical And Numerical Analysis ◽  
Rock Mechanical Properties

The rock mechanical properties under the effect of high temperature present a great significance on underground rock engineering. In this paper, the mechanical properties of sandstones, marbles, and granites under real-time heating were investigated with a servo-controlled compression apparatus. The results show that mechanical behaviours of all the three types of rocks are influenced by real-time heating to different degrees. Due to thermal cracking, the uniaxial compressive strengths decrease as the heating temperature rises from room temperature to 400°C. Above 400°C, the sandstone exhibits a significant increase in UCS because of the sintering reaction. The sintering enlarges the contact area and friction between crystal grains in the sandstone, which strengthens the bearing capacity. For marbles, the UCS continues to decrease from 400°C to 600°C due to thermal cracking. However, the carbonate in the marble begins to decompose after 600°C. The generated particles would fill the cracks in the marble and increase the strength. For granites, their UCS presents a sharp decline after 400°C because of thermal cracking. For all rock elastic modulus, they present a decreasing trend, and this indicates that the rock’s ability to resist deformation gradually weakens under the effect of temperature. In general, rock mechanical behaviours under real-time heating differ from those in normal situations, and use of the parameters presented here is important for underground rock engineering related to high temperature and can improve the precision in theoretical and numerical analysis.

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