Results 51 to 60 of about 1,265 (180)

critical stress intensity factor, hole, crack propagation, blasting load

Yantu gongcheng xuebao, 2018
In order to reflect the influences of bonding in structured soils on the ultimate shear stress ratio and dilatancy law, a dynamic moving critical state line (MCSL), which parallels to the traditional static critical state line (CSL) and moves to the CSL ...
ZHU En-yang 1,2, LI Xiao-qiang 2, ZHU Jian-ming 3
doaj   +1 more source

Hypoplasticity for Sand With Explicitly Defined Asymptotic States

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT A hypoplastic model for sand with defined asymptotic states is proposed. The fourth‐order tensor A$\mathsf {A}$ is defined by modifying the compression relation of the reference hypoplastic model by von Wolffersdorff (HP). This enables the mathematical formulation of a hypoplastic model for sand including the asymptotic state boundary surface (
Luis Mugele, David Mašín, Hans Henning Stutz   +2 more
wiley   +1 more source

Failure characteristics and the energy criterion of rock with a through‐going joint under true‐triaxial unloading conditions: Insights from the DEM model

Deep Underground Science and Engineering
Excavation unloading damages rock masses, with preferential failure along geological defects in rock engineering, which may induce catastrophe geological hazards.
Fei Liu, Changhui Liang, Sijia Liu, Yongjun Zhang, Luo Wang   +4 more
doaj   +1 more source

An Experimental Study on Deformation Fractures of Fissured Rock around Tunnels in True Triaxial Unloads

Advances in Materials Science and Engineering, 2015
Joints and cracks are frequently encountered in underground rock mass. During the process of tunnel excavations or other underground construction, the rock will be exposed suddenly, and such sudden unloading process will cause crack expansion and ...
Meng Wang, Zheming Zhu, Jun Xie
doaj   +1 more source

Effect of Double Annealing on the Microstructure and Mechanical Properties of a Medium Manganese Steel

steel research international, EarlyView.
A double intercritical annealing strategy is proposed to tailor the multiphase microstructure and mechanical response of a medium‐Mn steel. The treatment produces an ultrafine mixture of ferrite, martensite and multiple austenite populations with graded thermal and mechanical stability, formed through austenite reversion and controlled retransformation.
Mattia Franceschi, Jose A. Jimenez, Carlos Garcia‐Mateo, Radhakanta Rana   +3 more
wiley   +1 more source

Beyond Directions: Symmetry‐Aware Rotation Sets for Triaxial Diffusion Encoding by Geometric Filter Optimization

Magnetic Resonance in Medicine, Volume 96, Issue 5, Page 2489-2504, November 2026.
ABSTRACT Purpose To improve the accuracy of diffusion‐weighted powder average signals for diffusion encoding with arbitrary b‐tensors. Methods We identify an intrinsic dihedral (D2) symmetry of diffusion signals for arbitrary diffusion encoding, which defines their natural signal space (a quotient of 3D rotations). Based on this, we propose a method to
Sune Nørhøj Jespersen, Filip Szczepankiewicz   +1 more
wiley   +1 more source

A multifunctional shear apparatus for rocks subjected to true triaxial stress and high temperature in real-time

Journal of Rock Mechanics and Geotechnical Engineering
Deep engineering disasters, such as rockbursts and collapses, are more related to the shear slip of rock joints. A novel multifunctional device was developed to study the shear failure mechanism in rocks. Using this device, the complete shear–deformation
Jun Zhao, Xia-Ting Feng, Jia-Rong Wang, Liang Hu, Yue Guo   +4 more
doaj   +1 more source

Analytical Methodology to Determine Thermally Induced Soil Deformation From Laboratory Data

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 50, Issue 16, Page 5868-5890, November 2026.
ABSTRACT Experimental laboratory investigations underlie most of the knowledge about the mechanics of soils under non‐isothermal conditions and their thermally induced deformation. Despite advances, the understanding of thermally induced deformation of soils remains inconsistent, hindering the development of a coherent framework that can advance ...
Jibril B. Coulibaly, Alessandro F. Rotta Loria   +1 more
wiley   +1 more source

Effects of Ambient Moisture and Large‐Strain Dynamic Preloading on the Dynamic Properties of the EAC‐1A Regolith Simulant

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 50, Issue 16, Page 5701-5711, November 2026.
ABSTRACT The EAC‐1A lunar mare simulant, a silty sand, was selected by the European Astronaut Center (EAC) for use in the LUNA analogue facility's lunar simulation testbed. Its stress‐ and strain‐dependent shear modulus and damping ratio were determined via resonant column testing on specimens prepared either from ambient moisture material or oven ...
Christos Vrettos
wiley   +1 more source

An Anisotropic Constitutive Model for Crushable Geomaterials Based on Non‐Stationary Critical State Line Concept

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 50, Issue 16, Page 5919-5935, November 2026.
ABSTRACT In this paper, the dependencies of granular soil behaviour on particle crushing and fabric anisotropy are formulated within a novel model based on bounding surface plasticity theory enriched by the non‐stationary critical state line (NCSL) concept.
Hesam Dejaloud, Hamed Taghavizade, Mohammad Rezania   +2 more
wiley   +1 more source