Results 51 to 60 of about 429 (115)

The use of nanoindentation for determining internal lengths and the constitutive response of monument materials: models and experiments

Journal of the Mechanical Behavior of Materials, 2016
An alternative interpretation of nanoindentation experimental data and the associated phenomenon of indentation size effect (ISE) is proposed on the basis of a simple gradient elasticity equation, used to account for the development of elastic gradients ...
Konstantinidis Avraam A., Frantziskonis George, Askes Harm, Aifantis Elias C.   +3 more
doaj   +1 more source

Capturing wave dispersion in heterogeneous and microstructured materials through a three-length-scale gradient elasticity formulation

Journal of the Mechanical Behavior of Materials, 2018
Long-range interactions occurring in heterogeneous materials are responsible for the dispersive character of wave propagation. To capture these experimental phenomena without resorting to molecular and/or atomistic models, generalized continuum theories ...
De Domenico Dario, Askes Harm, Aifantis Elias C.   +2 more
doaj   +1 more source

Nanomechanics of a screw dislocation in a functionally graded material using the theory of gradient elasticity

Journal of the Mechanical Behavior of Materials, 2013
The modest aim of this short article is to provide some new results for a screw dislocation in a functionally graded material within the theory of gradient elasticity. These results, based on a displacement formulation and the Fourier transform technique,
Davoudi Kamyar M., Davoudi Hossein M., Aifantis Elias C.   +2 more
doaj   +1 more source

The Green tensor of Mindlin’s anisotropic first strain gradient elasticity

Materials Theory, 2019
We derive the Green tensor of Mindlin’s anisotropic first strain gradient elasticity. The Green tensor is valid for arbitrary anisotropic materials, with up to 21 elastic constants and 171 gradient elastic constants in the general case of triclinic media.
Giacomo Po, Nikhil Chandra Admal, Markus Lazar   +2 more
doaj   +1 more source

Multiscale modeling of dislocations: combining peridynamics with gradient elasticity

Materials Theory
Modeling dislocations is an inherently multiscale problem as one needs to simultaneously describe the high stress fields near the dislocation cores, which depend on atomistic length scales, and a surface boundary value problem which depends on boundary ...
Jonas Ritter, Michael Zaiser
doaj   +1 more source

Nonlinear Vibration Analysis of FG Nano-Beams in Thermal Environment and Resting on Nonlinear Foundation based on Nonlocal and Strain-Inertia Gradient Theory [PDF]

International Journal of Advanced Design and Manufacturing Technology, 2018
In present research, nonlinear vibration of functionally graded nano-beams subjected to uniform temperature rise and resting on nonlinear foundation is comprehensively studied.
Ebrahim Mahmoudpour
doaj  

Hard interfaces with microstructure: the cases of strain gradient elasticity and micropolar elasticity

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
As the size of a layered structure scales down, the adhesive layer thickness correspondingly decreases from macro- to micro-scale. The influence of the material microstructure of the adhesive becomes more pronounced, and possible size effect phenomena can appear.
Serpilli M., Rizzoni R., Lebon F.
openaire   +3 more sources

Longitudinal wave propagation analysis of a bar according to modified strain gradient elasticity theory

U.Porto Journal of Engineering
This paper employs the modified strain gradient elasticity theory to investigate microbars' size-dependent longitudinal wave propagation analysis. It presents the governing equation of motion of the modified strain gradient bar, which is derived using ...
Vlasios Dimosthenis
doaj   +1 more source

Gradient-Based Optimization of Linear Elasticity Mesh Deformation Quality

International Journal of Aerospace Engineering
Mesh deformation based on the linear elasticity method is crucial in aerospace engineering research. However, maintaining mesh quality after significant deformations can be challenging.
Jinxin Zhou, Xiaojun Wu, Bing Chen, Jing Yu, Shenshen Liu, Hongyin Jia   +5 more
doaj   +1 more source

Second Law of Thermodynamics and Strain Gradient Theories of Elasticity

Entropy
The paper addresses the second law of thermodynamics through the Clausius–Duhem inequality in its general form, with entropy flux and entropy production given by suitable constitutive functions.
Claudio Giorgi, Angelo Morro
doaj   +1 more source