Strain gradient continuum plasticity theories: theoretical, numerical and experimental investigations

GZ Voyiadjis, Y Song - International Journal of Plasticity, 2019 - Elsevier
Over the last three decades, a number of researchers have used the gradient-enhanced
plasticity theory to model the microstructural material behavior, which is not able to be …

Mechanics of adhesion in MEMS—a review

YP Zhao, LS Wang, TX Yu - Journal of Adhesion Science and …, 2003 - Taylor & Francis
A review is presented of the mechanics of microscale adhesion in microelectromechanical
systems (MEMS). Some governing dimensionless numbers such as Tabor number …

Size dependence of mechanical properties of gold at the micron scale in the absence of strain gradients

JR Greer, WC Oliver, WD Nix - Acta Materialia, 2005 - Elsevier
Classical laws of mechanics hold that mechanical properties are independent of sample
size; however, results of experiments and molecular dynamics simulations indicate that …

Geometrically necessary dislocation and size-dependent plasticity

H Gao, Y Huang - Scripta Materialia, 2003 - Elsevier
There has recently been a strong interest in modeling size-dependent plasticity in metals
based on the concept of geometrically necessary dislocations. This article presents a brief …

The correlation of the indentation size effect measured with indenters of various shapes

JG Swadener, EP George, GM Pharr - … of the Mechanics and Physics of …, 2002 - Elsevier
Experimental results are presented which show that the indentation size effect for pyramidal
and spherical indenters can be correlated. For a pyramidal indenter, the hardness measured …

Synthesis of ultra-incompressible superhard rhenium diboride at ambient pressure

HY Chung, MB Weinberger, JB Levine, A Kavner… - Science, 2007 - science.org
The quest to create superhard materials rarely strays from the use of high-pressure synthetic
methods, which typically require gigapascals of applied pressure. We report that rhenium …

Three-dimensional X-ray structural microscopy with submicrometre resolution

BC Larson, W Yang, GE Ice, JD Budai, JZ Tischler - Nature, 2002 - nature.com
Advanced materials and processing techniques are based largely on the generation and
control of non-homogeneous microstructures, such as precipitates and grain boundaries. X …

A conventional theory of mechanism-based strain gradient plasticity

Y Huang, S Qu, KC Hwang, M Li, H Gao - International Journal of Plasticity, 2004 - Elsevier
There exist two frameworks of strain gradient plasticity theories to model size effects
observed at the micron and sub-micron scales in experiments. The first framework involves …

Investigation of the indentation size effect through the measurement of the geometrically necessary dislocations beneath small indents of different depths using EBSD …

E Demir, D Raabe, N Zaafarani, S Zaefferer - Acta Materialia, 2009 - Elsevier
We study the link between the indentation size effect and the density of geometrically
necessary dislocations (GNDs) through the following approach: four indents of different …

Nanoindentation and the indentation size effect: Kinetics of deformation and strain gradient plasticity

AA Elmustafa, DS Stone - Journal of the Mechanics and Physics of Solids, 2003 - Elsevier
A study of the indentation size effect (ISE) in aluminum and alpha brass is presented. The
study employs rate effects to examine the fundamental mechanisms responsible for the ISE …