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M.M. Saadatpour

Bio: M.M. Saadatpour is an academic researcher from Isfahan University of Technology. The author has contributed to research in topics: Finite strip method & Buckling. The author has an hindex of 14, co-authored 35 publications receiving 502 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the free vibration of axially moving symmetrically laminated plates subjected to in-plan forces is studied by classical plate theory, which includes symmetric cross-ply and angle-ply laminates and anisotropic plates.

72 citations

Journal ArticleDOI
TL;DR: In this article, the spectral element method in frequency domain is employed to analyze continuous beams and bridges subjected to a moving load, and a modified Static Green's function is used as a modifying function to improve the moment and shear force.

59 citations

Journal ArticleDOI
TL;DR: In this article, the authors used the Hamilton's variational principle to obtain the general form of governing equation for free vibration analysis of tall buildings, where the entire length of the tall building is partitioned into uniform segments between each two successive discontinuity points.

38 citations

Journal ArticleDOI
TL;DR: In this article, a nonlinear mathematical theory for initial and post local buckling analysis of plates of abruptly varying stiffness based on the principle of virtual work is established, and several numerical examples are presented to demonstrate the scope and efficacy of the procedure.

34 citations

Journal ArticleDOI
TL;DR: In this paper, a theoretical formulation for the static analysis of arbitrary quadrilateral shaped plates is presented, based on the Galerkin method and uses the natural coordinates to express the geometry of general plates in a simple form.

31 citations


Cited by
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Book ChapterDOI
13 Sep 2012
TL;DR: This intermediate-level course is for students who are non-native speakers of English to gain skills in listening and speaking for both conversational and academic situations.
Abstract: EAP 3202 Listening and Speaking Skills: 3 semester hours Prerequisites: Placement by examination. This intermediate-level course is for students who are non-native speakers of English to gain skills in listening and speaking for both conversational and academic situations. Students improve comprehensive and discrete listening skills, note-taking skills, vocabulary use, discussion skills, and understanding of American culture.

352 citations

Journal ArticleDOI
Yufeng Xing1, Bo Liu1
TL;DR: In this paper, a DQ finite element method (DQFEM) is proposed for the free vibration analysis of thin plates, which combines the high accuracy of the differential quadrature method with the generality of the standard finite element formulation, and has superior accuracy to the standard FEM and FDM.
Abstract: SUMMARY Based on the differential quadrature (DQ) rule, the Gauss Lobatto quadrature rule and the variational principle, a DQ finite element method (DQFEM) is proposed for the free vibration analysis of thin plates. The DQFEM is a highly accurate and rapidly converging approach, and is distinct from the differential quadrature element method (DQEM) and the quadrature element method (QEM) by employing the function values themselves in the trial function for the title problem. The DQFEM, without using shape functions, essentially combines the high accuracy of the differential quadrature method (DQM) with the generality of the standard finite element formulation, and has superior accuracy to the standard FEM and FDM, and superior efficiency to the p-version FEM and QEM in calculating the stiffness and mass matrices. By incorporating the reformulated DQ rules for general curvilinear quadrilaterals domains into the DQFEM, a curvilinear quadrilateral DQ finite plate element is also proposed. The inter-element compatibility conditions as well as multiple boundary conditions can be implemented, simply and conveniently as in FEM, through modifying the nodal parameters when required at boundary grid points using the DQ rules. Thus, the DQFEM is capable of constructing curvilinear quadrilateral elements with any degree of freedom and any order of inter-element compatibilities. A series of frequency comparisons of thin isotropic plates with irregular and regular planforms validate the performance of the DQFEM. Copyright q 2009 John Wiley & Sons, Ltd.

131 citations

Journal ArticleDOI
TL;DR: In this paper, the buckling behavior of quadrilateral laminated thin-to-moderately thick plates composed of perfectly bonded carbon nanotube reinforced composite (CNTRC) layers is studied.
Abstract: The buckling behavior of quadrilateral laminated thin-to-moderately thick plates composed of perfectly bonded carbon nanotube reinforced composite (CNTRC) layers is studied. The stability equations are derived using the adjacent equilibrium (Trefftz) buckling criterion and based on the first-order shear deformation theory (FSDT) of plates. Four different profiles of the single walled carbon nanotubes (SWCNTs) distribution through the thickness of layers are considered, which include their uniform distribution (UD), functionally graded (FG) symmetric and asymmetric distributions. The stability equations subjected to arbitrary boundary conditions are discretized by employing a mapping-differential quadrature technique. The formulation and method of solution are validated by showing their fast rate of convergence and performing comparison studies with the available results in the open literature wherever possible. In addition, analytical solution for the simply supported symmetric laminated rectangular plate with CNTRC layers is derived and excellent agreement of the numerical results with the analytical solution is exhibited. Then, the effects of volume fraction of carbon nanotubes (CNTs), geometrical shape parameters, thickness-to-length ratio, different kinds of CNTs distribution along the layers thickness and boundary conditions on the critical buckling load of the quadrilateral laminated plates are investigated.

127 citations

01 Aug 2007
TL;DR: In this paper, the authors reviewed the current knowledge on factors affecting performance of moving force identification methods under main headings below: background of moving forces identification, experimental verification in laboratory and its application in field, mainly focusing on the potential of four developed identification methods, i.e. Interpretive Method I (IMI), Interpretive Methods II (IMII), Time Domain Method (TDM) and Frequency-Time Domain Method(FTDM).
Abstract: Identification of moving loads on bridges is an important inverse problem in the civil and structural engineering field. It is an effective way to better understand the interaction between the bridge and vehicles traversing it in order to achieve a satisfactory lifiespan for the future bridge design. The study on identification of moving loads has made a big progress over the past years. This paper reviews the current knowledge on factors affecting performance of moving force identification methods under main headings below: background of moving force identification, experimental verification in laboratory and its application in field. It mainly focuses on the potential of four developed identification methods, i.e. Interpretive Method I (IMI), Interpretive Method II (IMII), Time Domain Method (TDM) and Frequency-Time Domain Method (FTDM). Some parameter effects, such as vehicle-bridge parameters, measurement parameters and algorithm parameters, are also discussed. Although there are still many challenges and obstacles to be overcome before these methods can be implemented in practice, some conclusions that have been achieved on moving force identification are highlighted and recommendations served as a good indicator to steer the direction of further work in the field. (c) 2007 Elsevier Ltd. All rights reserved.

123 citations

Journal ArticleDOI
TL;DR: In this paper, the buckling behavior of single-layered graphene sheets (SLGSs) is investigated under bi-axial compression considering non-uniformity in the thickness.
Abstract: This paper presents an investigation on the buckling characteristics of nanoscale rectangular plates under bi-axial compression considering non-uniformity in the thickness. Based on the nonlocal continuum mechanics, governing differential equations are derived. Numerical solutions for the buckling loads are obtained using the Galerkin method. The present study shows that the buckling behaviors of single-layered graphene sheets (SLGSs) are strongly sensitive to the nonlocal and non-uniform parameters. The influence of percentage change of thickness on the stability of SLGSs is more significant in the strip-type nonoplates (nanoribbons) than in the square-type nanoplates.

105 citations