Results 1 to 10 of about 421,581 (294)

Mechanical properties and constitutive model of artificial frozen sandy soils under true triaxial stress state conditions

open access: yesCase Studies in Thermal Engineering
Triaxial compression tests were conducted on frozen sandy soils under a constant minimum principal stress (σ3 = 1.6 MPa) and various intermediate principal stresses (σ2 = 1.6, 3.4, 5.2, 7.0, 8.8, 9.8 MPa).
Kun Huang   +6 more
doaj   +1 more source

Analysis of Three-Dimensional Damage Constitutive Model of Frozen Sand Based on the Influence of Intermediate Principal Stress and Temperature

open access: yesAdvances in Civil Engineering, 2020
To study the mechanical properties of frozen soil, it is necessary to understand the damage characteristics of frozen soil. Four types of three-dimensional indoor tests of frozen sand were carried out at −5°C, −10°C, and −15°C to study the mechanical ...
Shilong Ma   +3 more
doaj   +1 more source

Failure in Confined Brazilian Tests on Sandstone

open access: yesApplied Sciences, 2021
Strength of rocks in the confined tension region, where the minimum principal stress is tensile, has only infrequently been measured and is not well understood. Quasi-static confined Brazilian tests under a range of confining stresses (2.76 to 27.58 MPa)
Tyler Hagengruber   +4 more
doaj   +1 more source

Numerical simulation on the simultaneous stress interference of parallel multiple hydraulic fractures

open access: yesEnergy Exploration & Exploitation, 2021
During horizontal well staged fracturing, there is stress interference between multiple transverse fractures in the same perforation cluster. Theoretical analysis and numerical calculation methods are applied in this study.
Weiyong Lu, Changchun He
doaj   +1 more source

Investigation on the effect of intermediate principal stress on shear behaviour of unsaturated soils [PDF]

open access: yesE3S Web of Conferences
Directional-dependent properties of the soil, like shear strength, stiffness and hydraulic conductivity, are known as anisotropy in soils. Shape and size of the soil particles and void distribution as microstructure characteristics and external factors ...
Jafarzadeh Fardin   +2 more
doaj   +1 more source

Stress and large-scale spatial structures in dense, driven granular flows

open access: yes, 2005
We study the appearance of large-scale dynamical heterogeneities in a simplified model of a driven, dissipative granular system. Simulations of steady-state gravity-driven flows of inelastically colliding hard disks show the formation of large-scale ...
A. Meheboob   +4 more
core   +1 more source

Bond–slip Behavior of Fiber-reinforced Polymer/concrete Interface in Single Shear Pull-out and Beam Tests [PDF]

open access: yes, 2015
It has been assumed that the fiber-reinforced polymer/concrete interface is subjected to in-plane shear condition when intermediate crack debonding failure occurs.
Harries, Kent A.   +2 more
core   +2 more sources

Mechanical characteristics of plane strain unloading conditions with different initial states

open access: yesYantu gongcheng xuebao
For the plane strain unloading issues in loess engineering, the lateral unloading plain strain tests on the loess with various initial states (intact, remolded and saturated) under different confining pressures and water contents are carried out by using
ZHANG Yu 1, 2, ZHAO Yang 1, LIU Keji 1, YE Sheng 1, LIU Jin 1, 2, DING Xiao 1, ZHANG Meng 1, QU Yonglong 1
doaj   +1 more source

The rheology of a suspension of nearly spherical particles subject to Brownian rotations [PDF]

open access: yes, 1972
A set of constitutive equations, valid for arbitrary linear bulk flows, is derived for a dilute suspension of nearly spherical, rigid particles which are subject to rotary Brownian couples.
Hinch, E. J., Leal, L. G.
core   +1 more source

Evaluation of the surface strength of glass plates shaped by hot slumping process

open access: yes, 2014
The Hot Slumping Technology is under development by several research groups in the world for the realization of grazing-incidence segmented mirrors for X-ray astronomy, based on thin glass plates shaped over a mould at temperatures above the ...
Basso, S.   +17 more
core   +1 more source

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