Thermal fluctuations, geometric exclusion, and external driving all govern the mechanical response of dense particulate suspensions. Here, we measure the stress-strain response of quasi-two-dimensional flow-stabilized microsphere heaps in a regime in which all three effects are present using a microfluidic device. We observe that the elastic modulus and the mean interparticle separation of the ...

We have carried out a series of laboratory experiments on AE monitoring to investigate the fracture behaviour of some dry and water-saturated rock samples of south-east Gujarat and Maharashtra which have been experiencing prolific seismicity in recent years in India. The results obtained from the study of Pavgadh rhyolites and Godhra granites tested to failure under triaxial compression are pre...

The study on the mechanical response of deep rock under hydromechanical couplings condition can guide safe excavation and stability evaluation tunnel engineering. effects monotonic loading cyclic properties granite 5 MPa pore water pressure 10 confining were studied by laboratory tests. Before peak stress, permeability was significantly higher than that loading, increased sharply after stress. ...

— The shearing strength and volumetric relationship of granular materials change notably with a variation of confining pressure. In this study the effect confining pressure on the mechanical behavior of granular materials were observed using discrete element method (DEM). The triaxial tests were conducted on seven specimens covering a range from extremely low to high confining pressures. Each i...

Abstract To study the combined effects of freeze–thaw cycles and chemical corrosion on deterioration mechanism triaxial mechanical properties sandstone in cold regions, compression tests were carried out homologous specimens after action acidic, alkaline or neutral solution cyclic action, by taking pH value hydrochemical number as control parameters. The failure mode is shear-slip failure, devi...

In geotechnical engineering, the mechanical behavior of rocks under various In-situ conditions (stress state including axial stress, confining pressure, pore water pressure) have always been an important topic. Therefore, pressure effect on permeability and different size sandstone samples a certain condition was studied. The sizes shows roughly same exponential de-creasing law with increase pr...

The micromechanical damage mechanics formulated by ASHBY and SAMMIS (Pure Appl Geophys 133(3) 489–521, 1990) has been shown to give an adequate description of the triaxial failure surface for a wide variety of rocks at low confining pressure. However, it does not produce the large negative curvature in the failure surface observed in Westerly granite at high confining pressure. We show that thi...

The characteristics of peat’s are crucial for understanding natural processes and their suitable shaping through the management water relations. This study focused on results one first hydraulic conductivity (k) laboratory tests exemplary peat samples from Biebrza Valley (a peatland very high environmental importance) in relation to stress state gradient. Further, research was devoted a specifi...