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Arash Reza

Islamic Azad University, Ahvaz Branch

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Hamid M. Sedighi

Shahid Chamran University of Ahvaz

Mohammad Shishesaz

Shahid Chamran University of Ahvaz

Seyed Alireza Seyed Roknizadeh

Shahid Chamran University of Ahvaz

Younes Shekari

Yasouj University

Jamal Zare

Shahrekord University

Mehdi Veisytabar

Islamic Azad University, Ahvaz Branch

Erfan Mirshekari

Islamic Azad University, Ahvaz Branch

Hamidreza Talebi Amanieh

Islamic Azad University, Ahvaz Branch

Majid Daniali

Shahid Chamran University of Ahvaz

Abdollah Veisiara

Islamic Azad University, Ahvaz Branch

Cooperative Institutions

Islamic Azad University, Ahvaz Branch

Shahid Chamran University of Ahvaz

Petroleum University of Technology

Amirkabir University of Technology

Yasouj University

Yasuj University of Medical Sciences

Shahrekord University

National Iranian Oil Company (Iran)

Polytechnic University of Turin

Henan Polytechnic University

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High precise analysis of lateral vibration of quintic nonlinear beam

Latin American Journal of Solids and Structures (2013)

Hamid M. Sedighi Arash Reza

This article intends to achieve a new formulation of beam vibration with quintic nonlinearity, including exact expressions for the beam curvature. To attain a proper design of the beam structures, it is essential to realize how the beam vibrates in its transverse mode which in turn yields the natural frequency of the system. In this direction, new powerful analytical method called Parameter Expansion Method (PEM) is employed to obtain the exact solution of frequency-amplitude relationship. Afterwards, it is clearly shown that the first term in series expansions is sufficient to produce a highly accurate approximation of mentioned system. Finally, preciseness of the present analytic procedures is evaluated in contrast with numerical calculations methods, giving excellent results.

Quintic function

Natural frequency

10.1590/s1679-78252013000200010

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Citations (15)

An improved framework based on four-parameter viscoelastic model for stress analysis of adhesively-bonded single stepped-lap joints

Mechanics of Advanced Materials and Structures (2022)

Mehdi Veisytabar Arash Reza Younes Shekari

The present study introduces an improved framework to analyze the longitudinal, shear, and peel stresses in the single stepped-lap joints under tensile loading based on a four-parameter viscoelastic model. To model the viscoelastic behavior of adhesive, the standard linear solid model is used. The governing differential equations are derived in the Laplace domain and are simultaneously solved and transformed using the Gaver–Stehfest inverse Laplace method. It was found that a rise in the butt thickness reduces the shear stress and increases the peel stresses. Moreover, an increase in the adhesive thickness reduces the longitudinal stress.

10.1080/15376494.2022.2114037

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Citations (4)

Buckling and Free Vibrations of a Magneto-Electro-Elastic Sandwich Panel with Flexible Core

Journal of solid mechanics. (2021)

Hamidreza Talebi Amanieh Seyed Alireza Seyed Roknizadeh Arash Reza

This paper presents the buckling and out-of-plane free vibration response of a sandwich panel with flexible core for the different boundary condition. In the desired configuration of the sandwich panel, the top and bottom plates are made of magneto-electro-elastic (MEE) plates. Moreover, the in-plane electric and magnetic potential fields are neglected for the derivation of the required relations. The sandwich structure is subjected to axial force in both longitudinal and transverse directions; in addition, and the top and bottom plates are exposed to electric and magnetic fields. The governing equations of motion for MEE sandwich panel with a flexible core are derived based on the first-order shear deformation theory by neglecting the displacement of the mid-plate and using the Hamilton’s principle. Furthermore, the derived partial differential equations (PDEs) are solved. According to the obtained numerical results, the core thickness, variation of electric field, variation of magnetic field and plate length are introduced as the most influential parameters on the free vibration response of the panel as well as the critical force of buckling. As one of the results, the electric potential is inversely related to the natural frequency and buckling load, so that with increasing the electric potential, the natural frequency and critical load of the structure is also increased.Moreover, the magnetic potential is directly related to the natural frequency and buckling load of the system, and increasing trends of natural frequency and critical load are observed by increasing the magnetic potential.

Natural frequency

10.22034/jsm.2020.1900703.1594

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The effect of viscoelasticity of adhesives on shear stress distribution in a double-lap joint using analytical method

Journal of Adhesion Science and Technology (2013)

Mohammad Shishesaz Arash Reza

Abstract In this paper, the effect of viscoelasticity of polymeric adhesives on shear stress distribution in the adhesive layer of a double lap joint under shear is studied. The postulated model is composed of three single isotropic adherend layers joined by polymeric adhesives. Each adherend layer is assumed to behave as linear elastic. The results are deduced for epoxy adhesive, and hence, 3-parameters solid model is used to model the viscoelastic behavior of the adhesive layers. The derived equilibrium equations are transformed into Laplace domain and are solved using residue theorem. Results show that for a step load of P 0 = 100 N, the peak shear stress in the epoxy adhesive layer reduces to its steady value over a time span of almost 1000 s. Moreover, if the applied load is raised gradually from zero to its final value of 100 N in seconds, its rate of increase has a direct effect on the peak shear stress developed in the adhesive layers. The influence of the adhesive thickness, as well as the effect of adhesive viscosity and its shear modulus (in terms of their ratio), on shear stress distribution in the adhesive joint are also investigated. Keywords: adhesive jointdouble-lap jointspolymeric resinsviscoelasticityresidue theorem

Lap joint

Shear modulus

10.1080/01694243.2013.769085

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Citations (16)

Optimal synthesis of an adjustable six-bar path generator mechanism using a cuckoo optimization algorithm

Journal of mechanics of materials and structures (2022)

Arash Reza Morteza Moslehi

Cuckoo

Bar (unit)

Cuckoo search

Optimization algorithm

10.2140/jomms.2022.17.149

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Citations (2)

Stress analysis of adhesively-bonded single stepped-lap joints based on three-parameter fractional viscoelastic foundation model

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications (2021)

Mehdi Veisytabar Arash Reza Younes Shekari

This paper aims to develop a viscoelastic analytical model for adhesively bonded single stepped-lap joints subjected to tensile loading. The adherends are aluminum alloy A6063 and modeled as Timoshenko elastic beams and the adhesive is epoxy type B. A three-parameter fractional viscoelastic foundation (3PFVF) model is proposed to express the governing stresses in the joint and the fractional Zener model is used to model the viscoelastic behavior of the adhesive layer. The proposed 3PFVF model makes it possible to have different peel stresses between the two interfaces of adhesive and adherends. The governing differential equations are derived in the Laplace domain, and then solved and transformed simultaneously in the time domain using the Gaver-Stehfest inverse Laplace transform method. The finite element simulation with ANSYS is applied to validate the proposed method. The results show that a simple fractional viscoelastic model, which has a short differential equation, offers the same results as the classical viscoelastic models, which have higher and more complex differential equations. Moreover, the results show that the maximum shear and peel stresses in the single stepped-lap joints are about 20% less than single-lap joints.

Lap joint

10.1177/14644207211062497

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Citations (7)

The effect of quintic nonlinearity on the investigation of transversely vibrating buckled Euler-Bernoulli beams

Journal of Theoretical and Applied Mechanics/Mechanika Teoretyczna i Stosowana (2013)

Hamid M. Sedighi Arash Reza Jamal Zare

A new formulation of vibrations of the axially loaded Euler-Bernoulli beam with quintic nonlinearity is investigated in the present study. The beam nonlinear natural frequency as a function of the initial amplitude is obtained. In this direction, modern powerful analytical methods namely He's Max-Min Approach (MMA) and Amplitude-Frequency Formulation (AFF) are employed to approximate the frequency-amplitude relationship of the beam vibrations. Afterwards, it is clearly shown that the first term in the series expansions is sufficient to produce a highly accurate approximation of the nonlinear system. Finally, preciseness of the present analytical procedures is evaluated in contrast with numerical calculation methods.

Quintic function

Axial symmetry

Natural frequency

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Citations (6)

A comparative study on the vibration of functionally graded Magneto-Electro-Elastic rectangular plate rested on a Pasternak foundation based on exponential and first-order shear deformation theories

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES (2020)

Hamidreza Talebi Amanieh Seyed Alireza Seyed Roknizadeh Arash Reza

In this paper, the in-plane and out-of-plane free vibrations of the functionally graded magneto-electro-elastic (FG-MEE) rectangular plate on a pasternak foundation were evaluated based on exponential shear deformation theory (ESDT) and first order shear deformation theory (FSDT). The material properties of FG-MEE varied along the thickness according to a power-law distribution model. It was assumed that the FG-MEE plate is subjected to initial external electrical and magnetic potentials; mreover, simply-supported boundary conditions were considered for all the edges of the FG-MEE plate. Firstly, the corresponding partial differential equations (PDEs) were derived using Hamilton’s principle, then, the natural frequencies were determined by solving the obtained equations through Navier’s approach according to the assumed boundary conditions. The results revealed that the natural frequencies of the plate decrease/increase with the increase of the electric/magnetic potentials. Moreover, the results showed a 0.03%, difference between the natural frequencies of the plate with a thickness-to-length ratio of 0.1 based on FSDT and ESDT; when the aspect ratio was increased to 0.2 and 0.3 this difference rose to 0.2% and 0.5%, respectively.

Plate theory

Aspect ratio (aeronautics)

Natural frequency

10.15282/jmes.14.3.2020.21.0566

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Citations (7)

Free vibration analysis of perforated plate using isogeometric analysis

Journal of Mechanical Engineering (2022)

Abdollah Veisiara Hamid M. Sedighi Arash Reza

In this paper, Isogeometric analysis (IGA) based on nonuniform rational B-splines (NURBS) is developed to study the free vibration analysis of the perforated plates with different open hole shapes and hole patterns. In this way, the governing equilibrium equations of perforated plate and strain-displacement relations are obtained using the first-order shear-deformable plate theory. The optimal number of control points and the order of the NURBS basis functions are determined to perform physical geometry related to perforated plate geometry. The eigenvalue equations with linear stiffness are established using the weak form of motion equations, energy method and Hamilton principle. The vibrational frequencies and corresponding mode shapes of the perforated plate is derived from governing eigenvalue equations. The results of linear vibrations of plate with central hole are validated considering the previously reported data and finite element analysis, which showed a good agreement. Thereafter, the influence of hole size and shape are explored on the linear vibrations of the plate with hole in same hole area ratio. Further, the effect of the triangular and rectangular pattern under the fully clamped and simply boundary conditions is presented. Keywords: Perforated plate, Isogeometric analysis, Bassis function, Control points, Free vibration, holes pattern.

Isogeometric analysis

Vibration of plates

Plate theory

Ritz method

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EFFECT OF CURVATURE DUCTILITY ON OVERALL DUCTILITY OF HIGH AND MEDIUM DUCTILE RCMR FRAMES

Abbas Ali Tasnimi Arash Reza

Ductility (Earth science)

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