Effect of Strain Gradient on Elastic and Plastic Size Dependency in Polycrystalline Copper DOI Creative Commons
Jaehoon Choi,

Hyemin Ryu,

Kwang-Hyeok Lim

и другие.

International Journal of Plasticity, Год журнала: 2023, Номер 171, С. 103824 - 103824

Опубликована: Ноя. 23, 2023

This study unveils the presence of size effect not only in plastic regime but also elastic under strain gradient. discovery emerges from a comprehensive set experiments encompassing micro-cantilever bending and micro-pillar compression tests. Subsequent finite element analysis serves to expose limitation classical continuum theory effectively demonstrate enhanced predictive capabilities couple stress both effects. To incorporate theory, systematic rigorous analysis-based optimization was devised determine length scale parameters, which are additional material properties theory. The resulting parameters for polycrystalline copper were found be 0.536 0.669μm regimes, respectively. explores physical interpretation these regimes.

Язык: Английский

Dynamics of imperfect inhomogeneous nanoplate with exponentially-varying properties resting on viscoelastic foundation DOI
Guoliang Liu,

Shengbin Wu,

Davood Shahsavari

и другие.

European Journal of Mechanics - A/Solids, Год журнала: 2022, Номер 95, С. 104649 - 104649

Опубликована: Май 17, 2022

Язык: Английский

Процитировано

105

A review on the mechanics of graphene nanoplatelets reinforced structures DOI
Kelly Yee, Mergen H. Ghayesh

International Journal of Engineering Science, Год журнала: 2023, Номер 186, С. 103831 - 103831

Опубликована: Фев. 24, 2023

Язык: Английский

Процитировано

82

Vibration characteristics of sandwich microshells with porous functionally graded face sheets DOI
Behrouz Karami, Mergen H. Ghayesh

International Journal of Engineering Science, Год журнала: 2023, Номер 189, С. 103884 - 103884

Опубликована: Май 6, 2023

Язык: Английский

Процитировано

54

Free transverse vibrations of nanobeams with multiple cracks DOI
Hossein Darban, Raimondo Luciano, Michał Basista

и другие.

International Journal of Engineering Science, Год журнала: 2022, Номер 177, С. 103703 - 103703

Опубликована: Май 17, 2022

Язык: Английский

Процитировано

43

On a 3D material modelling of smart nanocomposite structures DOI Creative Commons
Mohammad Malikan, Shahriar Dastjerdi, Victor A. Eremeyev

и другие.

International Journal of Engineering Science, Год журнала: 2023, Номер 193, С. 103966 - 103966

Опубликована: Окт. 13, 2023

Smart composites (SCs) are utilized in electro-mechanical systems such as actuators and energy harvesters. Typically, thin-walled components beams, plates, shells employed structural elements to achieve the mechanical behavior desired these composites. SCs exhibit various advanced properties, ranging from lower order phenomena like piezoelectricity piezomagneticity, higher effects including flexoelectricity flexomagneticity. The recently discovered flexomagneticity smart has been investigated under limited conditions. A review of existing literature indicates a lack evaluation three-dimensional (3D) elasticity analysis when flexomagnetic effect (FM) exists. To address this issue, governing equations will incorporate term ∂/∂z, where z represents thickness coordinate. variational technique guide us further developing equations. By using hypotheses theories 3D beam model, von Kármán's strain nonlinearity, Hamilton's principle, well-established direct converse FM models, we derive constitutive for thick composite beam. Conducting implies that gradient tensors must be expressed forms. inclusion ∂/∂z necessitates construction different model. It should noted current commercial finite element codes not equipped accurately adequately handle micro- nano-sized solids, thus making it impractical model structure programs. Therefore, transform derived characteristic linear bending into semi-analytical Polynomial domain obtain numerical results. This study demonstrates importance conducting analyses explore coupling multiple physical structures.

Язык: Английский

Процитировано

25

Forced Vibration Behaviour of Elastically Constrained Graphene Origami-Enabled Auxetic Metamaterial Beams DOI Creative Commons
Behrouz Karami, Mergen H. Ghayesh

Mathematical and Computational Applications, Год журнала: 2025, Номер 30(1), С. 5 - 5

Опубликована: Янв. 7, 2025

This paper explores the vibration behaviour of an elastically constrained graphene origami-enabled auxetic metamaterial beam subject to a harmonic external force. The effective mechanical properties are approximated using micromechanical model trained via genetic algorithm provided in literature. three coupled equations motion solved numerically; set trigonometric functions is used approximate displacement components. accuracy proposed confirmed by comparing it with natural frequencies simplified non-metamaterial structure available Following this validation, investigation extends investigate forced response beam, examining influence origami distribution pattern and content, folding degree, linear shear layer stiffness, geometrical parameters on dynamic structure. results generally highlight considerable effect layer, modelled as Pasternak foundation, beams.

Язык: Английский

Процитировано

2

On a flexomagnetic behavior of composite structures DOI
Mohammad Malikan, Victor A. Eremeyev

International Journal of Engineering Science, Год журнала: 2022, Номер 175, С. 103671 - 103671

Опубликована: Март 31, 2022

Язык: Английский

Процитировано

36

On time-dependent nonlinear dynamic response of micro-elastic solids DOI
Mohammad Malikan, Victor A. Eremeyev

International Journal of Engineering Science, Год журнала: 2022, Номер 182, С. 103793 - 103793

Опубликована: Ноя. 28, 2022

Язык: Английский

Процитировано

34

Highly nonlinear hyperelastic shells: Statics and dynamics DOI
Hossein Bakhshi Khaniki, Mergen H. Ghayesh

International Journal of Engineering Science, Год журнала: 2022, Номер 183, С. 103794 - 103794

Опубликована: Дек. 2, 2022

Язык: Английский

Процитировано

32

Size-dependent nonlinear thermomechanical in-plane stability of shallow arches at micro/nano-scale including nonlocal and couple stress tensors DOI
Zhicheng Yang,

Ismail Barbaros,

Saeid Sahmani

и другие.

Mechanics Based Design of Structures and Machines, Год журнала: 2023, Номер 52(6), С. 3229 - 3251

Опубликована: Апрель 12, 2023

In the present exploration, unconventional tensors of nonlocal stress and couple are incorporated simultaneously in in-plane nonlinear stability analysis functionally graded (FG) multilayer shallow micro/nano-arches under thermomechanical loading conditions. For this purpose, (NCS) mechanics continuum is implemented into third-order shear flexible arch theory incorporating von Karman kinematical nonlinearity. The nanocomposite material FG reinforced with graphene nanofillers accordance different patterns lamination. generalized differential quadrature numerical strategy conjunction pseudo arc-length continuation procedure employed to deduce roles NCS-based paths loaded micro/nano-arches. It found that for all lamination, contributions associated nonlocality small scale effects on value upper limit as well first bifurcation compressive loads less than those lower second ones. Also, it demonstrated by combining a temperature rise applied lateral load, load increases, while one decreases. Furthermore, seen applying rise, an initial deflection induced micro/nano-arch before load.

Язык: Английский

Процитировано

22