Results 11 to 20 of about 49,441 (301)
On a strain gradient theory of thermoviscoelasticity
Mechanics Research Communications, 2013 This paper is concerned with a strain gradient theory of thermoviscoelasticity in which the time derivatives of the strain tensors are included in the set of independent constitutive variables. The theory is motivated by the recent interest in the study of gradient theories.
Iesan, Dorin +1 more
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Strain Gradient Plasticity: Theory and Implementation
, 2020 This chapter focuses on the foundation and development of various higher-order strain gradient plasticity theories, and it also provides the basic elements for their finite element implementation. To this aim, we first refer to experiments exhibiting size-effects in metals and explain them by resorting to the concept of geometrically necessary ...
Lorenzo Bardella, Christian F. Niordson
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Engineering Science and Technology, an International Journal, 2018 In this paper, the damped forced vibration of single-walled carbon nanotubes (SWCNTs) is analyzed using a new shear deformation beam theory. The SWCNTs are modeled as a flexible beam on the viscoelastic foundation embedded in the thermal environment and ...
Mohammad Malikan +2 more
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Scalar-based strain gradient plasticity theory to model size-dependent kinematic hardening effects [PDF]
, 2021 A common belief in phenomenological strain gradient plasticity modeling is that including the gradient of scalar variables in the constitutive setting leads to size-dependent isotropic hardening, whereas the gradient of second-order tensors induces size ...
JEBAHI, Mohamed +3 more
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Thermo-electro-mechanical behaviour of Nano-sized structures [PDF]
MATEC Web of Conferences, 2020 Thermo-electro-mechanical behaviour of the nano-sized structures is analysed by the finite element method (FEM). The mechanical response of the nano-sized structures cannot be modelled with classical continuum theories due to the size effect phenomenon ...
Repka Miroslav, Sator Ladislav
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Analysis for the strain gradient theory of porous thermoelasticity [PDF]
Journal of Computational and Applied Mathematics, 2019 In this paper, we analyse a model involving a strain gradient thermoelastic rod with voids. Existence and uniqueness, as well as an energy decay property, are proved by means of the semigroup arguments. The variational formulation is derived and then, a fully discrete approximation is introduced by using the finite element method to approximate the ...
Fernández, José Ramón +3 more
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A non-second-gradient model for nonlinear elastic bodies with fibre stiffness
Scientific Reports, 2023 In the past, to model fibre stiffness of finite-radius fibres, previous finite-strain (nonlinear) models were mainly based on the theory of non-linear strain-gradient (second-gradient) theory or Kirchhoff rod theory.
M. H. B. M. Shariff +2 more
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A critical assessment of theories of strain gradient plasticity [PDF]
Acta Materialia, 2009 Theories to extend plasticity to the micron scale have been in existence for over a decade, complemented by a growing body of experimental data. Here, materials and mechanics aspects of two prominent strain gradient theories of plasticity, due to Nix and Gao and to Fleck and Hutchinson, are assessed within the context of simple bending.
Evans, Anthony G., Hutchinson, John
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Alexandria Engineering Journal, 2018 Recently, it was shown that the length scales presented in nonlocal elasticity and strain gradient theory each describe a different physical and material properties of structures at small scales.
H. Bakhshi Khaniki +2 more
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Engineering Transactions, 2020 This paper develops a nonlocal strain gradient plate model for buckling analysis of graphene sheets under hygro-thermal environments with mass sensors.
Rajendran SELVAMANI +2 more
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