Results 11 to 20 of about 270,844 (279)

Size-dependent static response of a functionally graded nanobeam attached to a piezoelectric fibre-reinforced composite actuator [PDF]

Scientific Reports
This study presents, for the first time, a theoretical investigation into the static bending behaviour of a functionally graded (FG) nanobeam integrated with a piezoelectric fibre-reinforced composite (PFRC) actuator.
Rabab A. Alghanmi
doaj   +2 more sources

Mechanism-based strain gradient plasticity— I. Theory

Journal of the Mechanics and Physics of Solids, 1999
Non uniform strain experiments as twisting of thin wires, bending of thin beams, and micro- or nano-indentation show a strong increase in strength with increasing strain gradient. In order to mathematically describe these findings, the authors formulate mechanism-based strain gradient plasticity.
Gao, H., Huang, Y., Nix, W. D., Hutchinson, J. W.   +3 more
openaire   +4 more sources

The ab-initio aided strain gradient elasticity theory

Fracture and Structural Integrity, 2019
When the width of cracked nanocomponents made of brittle or quasi-brittle materials is less than approximately , the size of the - dominance zone becomes smaller than  and comparable to the fracture process zone ( ).
Tomas Profant, Jaroslav Pokluda
doaj   +3 more sources

A new deformation theory with strain gradient effects [PDF]

International Journal of Plasticity, 2002
A new phenomenological deformation theory with strain gradient effects is proposed. This theory, which belongs to nonlinear elasticity, fits within the framework of general couple stress theory and involves a single material length scale l. In the present theory three rotational degrees of freedom omega(i) are introduced in addition to the conventional
Chen, S. H., Wang, T. C.
openaire   +3 more sources

Displacement potential functions for elastodynamic problems in transversely isotropic media based on nonlocal strain gradient theory [PDF]

مهندسی عمران شریف, 2022
Today nanotechnology has become important in many fields, including industry, medicine, engineering, aerospace, national security and electronics. As the dimensions of the structures decrease, the effects of size play a crucial role in properties of the ...
P. Nateghi Babagi, B. Navayi Neya, M. Eskandari Ghadi   +2 more
doaj   +1 more source

Wave propagation analysis in transversely isotropic piezoelastic medium based on nonlocal strain gradient theory

Vietnam Journal of Mechanics, 2023
The purpose of this research is to study the propagation of surface waves in transversely isotropic piezoelastic medium based on nonlocal strain gradient theory. A characteristics equation for the existence of surface waves is discussed.
Trinh Thi Thanh Hue, Do Xuan Tung
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On Representing Strain Gradient Elastic Solutions of Boundary Value Problems by Encompassing the Classical Elastic Solution

Mathematics, 2022
The present work aims to primarily provide a general representation of the solution of the simplified elastostatics version of Mindlin’s Form II first-strain gradient elastic theory, which converges to the solution of the corresponding classical elastic ...
Antonios Charalambopoulos, Theodore Gortsas, Demosthenes Polyzos   +2 more
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A Semi-analytical Solution for Flexural Vibration of Micro Beams Based on the Strain Gradient Theory [PDF]

Journal of Theoretical and Applied Vibration and Acoustics, 2015
In this paper, the flexural free vibrations of three dimensional micro beams are investigated based on strain gradient theory. The most general form of the strain gradient theory which contains five higher-order material constants has been applied to the
Mehdi Hashemi, Mohsen Asghari
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Path-independent J-integral for cracks in decagonal quasicrystals [PDF]

MATEC Web of Conferences, 2020
The path-independent J-integral is derived for fracture mechanics analysis of decagonal quasicrystals (QCs). The gradient theory of quasicrystals is developed here to consider large strain gradients at the crack tip vicinity.
Sladek Jan, Sladek Vladimir, Repka Miroslav   +2 more
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Primary resonance of an Euler-Bernoulli nano-beam modelled with second strain gradient [PDF]

Journal of Theoretical and Applied Vibration and Acoustics, 2019
In the present manuscript, the second strain gradient (SSG) is utilized to investigate the primary resonance of a nonlinear Euler-Bernoulli nanobeam is analyzed in this paper for the first time.
Hossein Mohammadi, Soroush Sepehri
doaj   +1 more source