A modified true triaxial test system that allows a specimen to be unloaded on one surface

2012 ◽  
pp. 267-282
Keyword(s):  
Triaxial Test ◽  
Test System ◽  
True Triaxial Test ◽  
True Triaxial

scholarly journals A novel true triaxial test system for microwave-induced fracturing of hard rocks

2021 ◽  
Author(s):  
Xia-Ting Feng ◽  
Jiuyu Zhang ◽  
Chengxiang Yang ◽  
Jun Tian ◽  
Feng Lin ◽  
...  
Keyword(s):  
Triaxial Test ◽  
Test System ◽  
True Triaxial Test ◽  
True Triaxial ◽  
Hard Rocks

Study on Microstructure Changes of Soft Clay in the Peal River Delt under Dynamic Load

2014 ◽  
Vol 894 ◽  
pp. 238-244
Author(s):  
Shi Hua Liang ◽  
Lang Zhang ◽  
Yong Jian Liu ◽  
Na Fu
Keyword(s):  
Dynamic Load ◽  
Soft Soil ◽  
Soft Clay ◽  
Microscopic Theory ◽  
Average Diameter ◽  
Test System ◽  
True Triaxial Test ◽  
True Triaxial ◽  
Shape Coefficient ◽  
Microstructure Parameters

The characteristics and distribution of pores in soil are the key factors in the determination of the physical and mechanical characteristics of soft soil. Using static-dynamic true triaxial test system of modified SPAX-2000 and scanning electron microscope (SEM), the microstructure images of soft clay in the Peal River Delt are studied. By analyzing these microstructure images, eight microstructure parameters including number of pore, total area, classification of area, total perimeter, average diameter, roundness, shape coefficient and anisotropy have been obtained. The changes of microstructure parameters are analyzed ,before and after applying dynamic load . The results show that the change of microstructure parameters has certain rules. This study is help to provide microscopic theory basis for static-dynamic drainage consolidation method to treatment soft ground engineering design.

Large-Scale True Triaxial Test on Stress-Strain and Strength Properties of Rockfill

2020 ◽  
Vol 20 (1) ◽  
pp. 04019146 ◽  
Author(s):  
Jiajun Pan ◽  
Jiwei Jiang ◽  
Zhanlin Cheng ◽  
Han Xu ◽  
Yongzhen Zuo
Keyword(s):  
Triaxial Test ◽  
Large Scale ◽  
Strength Properties ◽  
True Triaxial Test ◽  
Stress Strain ◽  
True Triaxial

Sand Mass Production in Anisotropic Stresses from Lab to Field Predictions

2021 ◽  
Author(s):  
Euripides Papamichos ◽  
Lars Erik Walle ◽  
Andreas Nicolas Berntsen ◽  
Dawid Szewcyk
Keyword(s):  
Water Saturation ◽  
In Situ Stress ◽  
Test System ◽  
True Triaxial Test ◽  
Hydrocarbon Production ◽  
True Triaxial ◽  
Stress Anisotropy ◽  
Fluid Saturation ◽  
Irreducible Water Saturation ◽  
Laboratory Results

Abstract Sand onset and sand rate predictions are important in hydrocarbon production to optimize production, increase recovery, and reduce costs and the environmental footprint. Recent laboratory results on Castlegate sandstone from sand production tests in a True Triaxial test system have revealed that stress anisotropy plays an important role not only on sand onset but also in sand rate. The results confirmed our hypothesis that stress anisotropy means earlier sand produced but less sand. The laboratory results also revealed the effect of fluid saturation, i.e., oil, brine or irreducible water saturation on sand onset and sand rate. They allow the calibration of SandPredictor, a field sand prediction model, for stress anisotropy and production before and after water breakthrough. A field case analysis demonstrated the effects and showed the importance of in situ stress anisotropy and watercut on sand mass and rate.

Mechanical response of rockfills in a simulated true triaxial test: A combined FDEM study

2014 ◽  
Vol 7 (3) ◽  
pp. 317-333 ◽  
Author(s):  
Gang Ma ◽  
Xiao-Lin Chang ◽  
Wei Zhou ◽  
Tang-Tat Ng
Keyword(s):  
Triaxial Test ◽  
Mechanical Response ◽  
True Triaxial Test ◽  
True Triaxial

scholarly journals Flow of anisotropic ice from the EPICA core: a new test apparatus

2000 ◽  
Vol 30 ◽  
pp. 1-7
Author(s):  
Peter R. Sammonds ◽  
S. Boon ◽  
N. Hughes ◽  
M. A. Rist
Keyword(s):  
Triaxial Test ◽  
Biaxial Loading ◽  
Ice Core ◽  
Confining Pressure ◽  
Tomographic Imaging ◽  
Test Apparatus ◽  
True Triaxial Test ◽  
True Triaxial ◽  
Fabric Evolution ◽  
New Apparatus

AbstractOur objective is to measure the mechanical properties of anisotropic ice of the EPICA ice core, from Dome Concordia, Antarctica, through the full depth of the borehole in deformation experiments under simulated ice-sheet conditions of temperature and pressure. We propose to undertake experiments on the EPICA core using both a conventional triaxial-test apparatus and a new, true, triaxial-test apparatus incorporating automated tomographic imaging of the ice-fabric evolution during deformation. We present the design of this new apparatus together with our testing methodology for EPICA ice. The new apparatus is capable of deforming an ice specimen, up to 200 mm × 100 mm × 40 mm, under servo-controlled biaxial loading with a superimposed confining pressure of 50 MPa and at temperatures down to –40°C. Highly unusual problems arising from the true triaxial nature of the apparatus and tomographic imaging are discussed.

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