Results 41 to 50 of about 253 (158)

Memory of Stress History in Single and Two Surface Plasticity for Granular Soils

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 50, Issue 2, Page 597-612, 10 February 2026.
ABSTRACT Recent studies have identified limitations in Manzari and Dafalias' 1997 and 2004 sand plasticity models, particularly regarding one‐way unloading/reloading and ratcheting loading modes. These models are widely accepted as bounding surface models in the geotechnical engineering community; thus, concerns have arisen about a fundamental lack of ...
Alexandros L. Petalas
wiley   +1 more source

Shakedown loading optimization under constrained residual displacements—formulation and solution for circular plates

Journal of Civil Engineering and Management, 2002
The adapted plate load optimization problem is formulated applying the non-linear mathematical programming methods. The load variation bounds satisfying the optimality criterion in concert with the strength and stiffness requirements are to be identified.
Ela Jarmolajeva, Juozas Atkočiūnas
doaj   +1 more source

Charge Compensation Mechanisms in Ni‐Rich NMC Cathodes

Batteries &Supercaps, Volume 8, Issue 12, December 2025.
Understanding charge compensation in nickel‐rich NMC cathodes is crucial for optimizing electrochemical performance. This study uses various spectroscopic techniques to investigate the correlation between transition metal oxidation states and Li depth profile in NMC811.
Jesus Díaz‐Sánchez, Ingeborg S. Ellingsen, Elena Salagre, Jesús Sánchez‐Prieto, Noelia Maldonado, Arturo Galindo, Carmen Morant, Enrique Vasco, Gastón Garcia, Daniel Rettenwander, Juan Rubio‐Zuazo, Enrique G. Michel, Celia Polop   +12 more
wiley   +1 more source

New shakedown criterion and permanent deformation properties of unbound granular materials

Journal of Modern Transportation, 2019
Unbound granular material specifications for road pavements in Australia are primarily based on physical material specification rather than mechanical characterisation.
Ali Alnedawi, Kali Prasad Nepal, Riyadh Al-Ameri   +2 more
doaj   +1 more source

Neohypoplasticity for Sand Coupled With the Generalized Intergranular Strain Concept

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 49, Issue 15, Page 3484-3508, 25 October 2025.
ABSTRACT This work presents the coupling of the recently revisited advanced hypoplastic constitutive sand model called neohypoplasticity (NHP) with the more recently introduced concept of the generalized intergranular strain (GIS) to account for soil behavior due to small strains. The latter is essential for the simulation of cyclic deformations.
Luis Mugele, Hans Henning Stutz, David Mašín   +2 more
wiley   +1 more source

Friction Characterization and Mitigation in Large‐Scale 6DOF Multi‐Axial Hybrid Simulation

Earthquake Engineering &Structural Dynamics, Volume 54, Issue 9, Page 2283-2302, 25 July 2025.
ABSTRACT In the last few decades, hybrid simulation has become widely used for understanding the response of structural components and systems under extreme loading conditions. Large‐scale, three‐dimensional (3D), multi‐axial testing facilities with six degrees of freedom (6DOF) are versatile testing systems that can be used for testing a variety of ...
Pedram Mortazavi, Xiuyu S. Gao, Shawn You, Steve Barbachyn, Lauren Linderman, Catherine French, Carol Shield, Scott Nesvold   +7 more
wiley   +1 more source

Tracking Active Site Formation during Oxidative Activation of Copper‐Exchanged Zeolites for Methane‐to‐Methanol Conversion

Advanced Science, Volume 12, Issue 13, April 3, 2025.
The oxidative generation of Cu(II) active sites in Cu‐exchanged zeolites for the CH4‐to‐CH3OH conversion has been studied. Complementary in situ/operando spectroscopic techniques highlight that the formation rate and the stability of different Cu(II) species are governed by their structure and the zeolite topology.
Andreas Brenig, Jörg W. A. Fischer, Daniel Klose, Gunnar Jeschke, Jeroen A. van Bokhoven, Vitaly L. Sushkevich   +5 more
wiley   +1 more source

Evaluation of Steel Slag as a Sustainable Alternative Aggregate for Railway Ballast: A Shakedown Theory-Based Approach

Buildings
Recent advancements in railway construction have emphasized environmental sustainability, integrating considerations of environmental impact into the planning and execution of infrastructure projects to reduce costs and mitigate adverse effects.
William Wilson dos Santos, Lisley Madeira Coelho, Sergio Neves Monteiro, Maria Esther Soares Marques, Antônio Carlos Rodrigues Guimarães   +4 more
doaj   +1 more source

Replace Platinum for Hydrogen Evolution Reaction in the Cathode of Proton Exchange Membrane Water Electrolyzers

SusMat, Volume 5, Issue 2, April 2025.
This review examines the shift from platinum to more affordable alternatives for the hydrogen evolution reaction in proton exchange membrane water electrolyzers. It highlights ongoing advancements in cathodes mainly based on ruthenium, nonprecious metals, and nonmetals, focusing on innovations in structure, interfacial engineering, and the use of ...
Ushtar Arshad, Jiayi Tang, Zongping Shao
wiley   +1 more source

On shakedown and ratchetting of conforming frictional systems

Vietnam Journal of Mechanics, 2009
Conforming contact is found on many important areas: materials with cracks, inclusions, layered structures, pinned geometries, etc. Coulomb friction is non-associative i.e.
M. Ciavarella
doaj   +1 more source