ORCID Profile
0000-0002-5056-829X
Current Organisation
Sejong University
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Publisher: Elsevier BV
Date: 02-2009
Publisher: SAGE Publications
Date: 07-02-2014
Abstract: A nonlocal sinusoidal plate model for micro/nanoscale plates is developed based on Eringen’s nonlocal elasticity theory and sinusoidal shear deformation plate theory. The small-scale effect is considered in the former theory while the transverse shear deformation effect is included in the latter theory. The proposed model accounts for sinusoidal variations of transverse shear strains through the thickness of the plate, and satisfies the stress-free boundary conditions on the plate surfaces, thus a shear correction factor is not required. Equations of motion and boundary conditions are derived from Hamilton’s principle. Analytical solutions for bending, buckling, and vibration of simply supported plates are presented, and the obtained results are compared with the existing solutions. The effects of small scale and shear deformation on the responses of the micro/nanoscale plates are investigated.
Publisher: Elsevier BV
Date: 05-2014
Publisher: Elsevier BV
Date: 11-2015
Publisher: Elsevier BV
Date: 06-2015
Publisher: Elsevier BV
Date: 10-2009
Publisher: Springer Science and Business Media LLC
Date: 24-05-2016
Publisher: Elsevier BV
Date: 04-2009
Publisher: Elsevier BV
Date: 2010
Publisher: Elsevier BV
Date: 03-2010
Publisher: Elsevier BV
Date: 11-2009
Publisher: Elsevier BV
Date: 2011
Publisher: Elsevier BV
Date: 2015
Publisher: Elsevier BV
Date: 05-2016
Publisher: Elsevier BV
Date: 07-2008
Publisher: Springer Science and Business Media LLC
Date: 09-2017
Publisher: Elsevier BV
Date: 11-2016
Publisher: Elsevier BV
Date: 06-2009
Publisher: Elsevier BV
Date: 11-2016
Publisher: Elsevier BV
Date: 02-2010
Publisher: Elsevier BV
Date: 06-2008
Publisher: Elsevier BV
Date: 09-2009
Publisher: Elsevier BV
Date: 09-2009
Publisher: SAGE Publications
Date: 29-04-2015
Abstract: This paper presents an analytical solution for vibration and buckling of functionally graded (FG) sandwich beams using various quasi-3D theories, which consider effects of both shear and normal deformation. Sandwich beams with FG skins–homogeneous core and homogeneous skins–FG core are considered. By using the Hamilton’s principle, governing equations of motion are derived. An analytical solution is presented, and the obtained results by various quasi-3D theories are compared with each other and with the available solutions in the literature. The effects of normal strain, power-law indexes, skin–core–skin thickness and slenderness ratios on vibration and buckling behaviour of sandwich beams are investigated.
Publisher: World Scientific Pub Co Pte Ltd
Date: 13-04-2017
DOI: 10.1142/S0219876217500335
Abstract: This paper presents a free vibration analysis of cable structures based on the isogeometric approach. The nonuniform rational B-splines (NURBS) basis functions are employed to represent both the exact geometry of cable and displacement fields. In order to enrich the basis functions, the [Formula: see text]-, [Formula: see text]- and [Formula: see text]-refinement strategies are implemented. Therefore, these refinement schemes increase the accuracy of solution fields. For determining the static configuration of slack cables as a reference configuration, the well-known penalty method is used. Three numerical ex les for slack and taut cable structures are presented in which different refinement schemes are utilized to obtain the converged results. The accuracy and reliability of the present numerical method are verified by comparing the natural frequencies with the results given by other researchers.
Publisher: Elsevier BV
Date: 12-2015
Publisher: Elsevier BV
Date: 2015
Publisher: Elsevier BV
Date: 09-2007
Publisher: Springer Science and Business Media LLC
Date: 05-03-2010
Publisher: Springer Science and Business Media LLC
Date: 22-02-2016
Publisher: Springer Science and Business Media LLC
Date: 22-09-2010
Publisher: Informa UK Limited
Date: 05-2014
Publisher: Elsevier BV
Date: 2015
Publisher: Elsevier BV
Date: 05-2015
Publisher: Elsevier BV
Date: 08-2007
Publisher: MDPI AG
Date: 25-05-2022
DOI: 10.3390/MATH10111822
Abstract: Analytical paradigms have limited conventional form-finding methods of tensegrities therefore, an innovative approach is urgently needed. This paper proposes a new form-finding method based on state-of-the-art deep learning techniques. One of the statical paradigms, a force density method, is substituted for trained deep neural networks to obtain necessary information of tensegrities. It is based on the differential evolution algorithm, where the eigenvalue decomposition process of the force density matrix and the process of the equilibrium matrix are not needed to find the feasible sets of nodal coordinates. Three well-known tensegrity ex les including a 2D two-strut, a 3D-truncated tetrahedron and an icosahedron tensegrity are presented for numerical verifications. The cases of the ReLU and Leaky ReLU activation functions show better results than those of the ELU and SELU. Moreover, the results of the proposed method are in good agreement with the analytical super-stable lines. Three ex les show that the proposed method exhibits more uniform final shapes of tensegrity, and much faster convergence history than those of the conventional one.
Publisher: Elsevier BV
Date: 08-2009
Publisher: Informa UK Limited
Date: 14-09-2013
Publisher: Elsevier BV
Date: 10-2010
Publisher: Elsevier BV
Date: 04-2014
No related grants have been discovered for Jaehong Lee.