Experimental investigation and modeling of fiber metal laminates hydroforming process by GWO optimized neuro-fuzzy network

Amir Hossein Rabiee; Ehsan Sherkatghanad; Ali Zeinolabedin Beygi; Hassan Moslemi Naeini; Lihui Lang

Volume 12, Issue 2 , February 2023, , Pages 193-209

  In this paper, by considering the processing parameters, including blank holder force, blank holder gap, and cavity pressure as the most important input factors in the hydroforming process, an experimental design is performed, and an adaptive neural-fuzzy inference system (ANFIS) is applied to model ...  Read More

Energy Science and Technology
Experimental investigation on constant-speed diesel engine fuelled with biofuel mixtures under the effect of fuel injection


Volume 9, Issue 2 , February 2020, , Pages 225-233

  The petroleum product has seen a drastic demand in the recent past. Biofuels are the only solution to overcome this power crisis. In the view of sustainable energy development, biodiesel and its additives have become the best options for fossil fuel-based engines. In this work, a biodiesel mix was used ...  Read More

Nonlinear Solution
Analysis of generalized compressor characteristics on surge phenomena in axial compressors

Adnan Maqsood; Muhammad Kamran Khan Tareen; Rizwan Riaz; Laurent Dala

Volume 10, Issue 2 , April 2021, , Pages 337-344

  The paper discusses the effect of compressor characteristic on surge phenomena in axial flow compressors. Specifically, the effect of nonlinearities on the compressor dynamics is analyzed. For this purpose, generalized multiple time scales method is used to parameterize equations in amplitude and frequency ...  Read More

Heat and Mass Transfer
Electrical resistance heating distribution on three dimensional Jeffrey radiating nanofluid flow past stretching surface

Barinepalle Malleswari; POORNIMA T T; Sreenivasulu Pandikunta; N Bhaskar Reddy

Volume 11, Issue 2 , March 2022, , Pages 339-349

  This study emphasizes  the upshots of non-linear radiation and electrical resistance heating on a three dimensional Jeffrey dissipating nanoflow in view of convective surface conditions. The initial set of nonlinear dimensional boundary layer equations are transformed into a system of ordinary differential ...  Read More

Prediction of earing in deep drawing of anisotropic aluminum alloy sheet using BBC2003 yield criterion

S. Izadpanah; S. H. Ghaderi; M. Gerdooei

Volume 6, Issue 2 , June 2017, , Pages 47-55

  This paper investigates the earing phenomenon in deep drawing of AA3105 aluminum alloy, experimentally and numerically. Earing defect is mainly attributed to the plastic anisotropy of sheet metal. In order to control such defect, predicting the evolution of ears in sheet metal forming analyses becomes ...  Read More

Fluid Mechanics
Applying evolutionary optimization on the airfoil design

Abolfazl Khalkhali*; Hamed Safikhani

Volume 2, Issue 1 , December 2012, , Pages 51-62

  In this paper, lift and drag coefficients were numerically investigated using NUMECA software in a set of 4-digit NACA airfoils. Two metamodels based on the evolved group method of data handling (GMDH) type neural networks were then obtained for modeling both lift coefficient (CL) and drag coefficient ...  Read More

A new strategy for controlling wind turbines against sensor faults and wake effects to harvest more electrical energy

Seyed Vahab Shojaedini; Armin Parsiannejad

Volume 6, Issue 1 , December 2016, , Pages 51-64

  This paper describes a new method for harvesting maximum electrical energy in wind farms. In proposing technique, the stochastic process principles are applied for detecting fault measurements of sensors. On the other hand, the wind farm is modeled by using fuzzy concept. Thereby the turbines are controlled ...  Read More

Coordinate influence on singularity of a 3-ups parallel manipulator
Volume 1, Issue 1 , December 2011, , Pages 53-58

  This paper shows the coordinates influence on singularity of a three degree-of-freedom structure, namely, three-Universal-Prismatic-Spherical (3-UPS) parallel manipulator. Rotational coordinates, which are chosen to define the orientation of the platform, affect the singularity of the manipulator. Euler ...  Read More

Evaluation of combined hardening model in ratcheting behavior of pressurized piping elbows subjected to in-plane moments

Seyed javid Zakavi; Behzad Shiralivand; Mohammad nourbakhsh

Volume 7, Issue 1 , August 2017, , Pages 57-71

  In this paper the ratcheting behavior of carbon steel(ASTM A106B) and stainless steel(304L) elbows is studied under steady internal pressure and in-plane external moments at frequencies typical of seismic excitations. The finite element analysis with the nonlinear isotropic/kinematic (combined) hardening ...  Read More

Non destructive damage severity estimation in beam using change in extended cross modal strain energy

Mellel Nacim; Ouali Mohammed; Dougdag Mourad; Mohammedi Brahim

Volume 11, Issue 1 , September 2021, , Pages 57-65

  This paper presents an extended cross modal strain energy change method to estimate the severity of damage associated with limited modal data in beam-like structures. This method takes in account the correlation between the analytical modal data and the measured incomplete modal data. A procedure ...  Read More

Nonlinear Solution
Construction of solitary solution and compacton-like solution by the variational iteration method using He's polynomials

M. Matinfar; M. Ghasemi

Volume 2, Issue 2 , June 2013, , Pages 59-68

  Variational Iteration method using He's polynomials can be used to construct solitary solution and  compacton-like solution for nonlinear dispersive equatioons. The chosen initial solution can be determined in compacton-like form or in solitary form with some compacton-like or solitary forms with ...  Read More

Thermodynamics and Cumbustion
Internal combustion engines in cylinder flow simulation improvement using nonlinear k-ε turbulence models

A. A. Mirmohammadi; F. Ommi

Volume 5, Issue 1 , December 2015, , Pages 61-69

  The purpose of this paper is to studying nonlinear k-ε turbulence models and its advantages in internal combustion engines, since the standard k-ε model is incapable of representing the anisotropy of turbulence intensities and fails to express the Reynolds stresses adequately in rotating ...  Read More

Effects of Different Turbulence Models in Simulation of Unsteady Tip Leakage Flow in Axial Compressor Rotor Blades Row

Sarallah Abbasi; Marhamat zienali

Volume 8, Issue 1 , September 2018, , Pages 61-74

  Characteristics of rotor blade tip clearance flow in axial compressors can significantly affect their performance and stable operation. It may also increase blade vibrations and cause detrimental noises. Therefore, this paper is contributed to investigate tip leakage flow in a low speed isolated axial ...  Read More

Heat and Mass Transfer
Free convection in a 3D chamber with local cooling and heating

M. Nasiri; B. Ghasemi

Volume 3, Issue 1 , December 2013, , Pages 63-74

  This paper modeled heating air of a room through examining free convection in a 3D chamber. The chamber had cold and hot sources with Tc and Th temperatures, respectively. Its other walls were adiabatic. This study aimed at predicting effect of temperature difference, displacement of hot and cold sources ...  Read More

Modeling of dynamic cutting forces and cutting characteristics based on the analyzed results of average force-feed rate relationship in milling process

Nhu-Tung Nguyen; Dong Van Pham; Dung Tien Hoang; Cuong Duc Pham

Volume 12, Issue 1 , August 2022, , Pages 63-75

  Cutting force coefficients (CFCs) are the most important factors in the prediction of CFs (CFs) and other machining characteristics (MCs). This study was conducted to model the CFs and MCs in the milling process based on the calculated values of CFCs. From the relationship of average values of CFs and ...  Read More

Heat and Mass Transfer
Lattice Boltzmann simulation inside a cavity: The effect of pipe profile on natural convection

Seyed Mostafa Moafi Madani; Javad Alinejad; Yasser Rostamiyan; Keivan Fallah

Volume 13, Issue 1 , September 2023, , Pages 67-74

  In the present study, the effect of the heating pipe profile on natural convection in a two-phase fluid inside a cavity has been investigated. This geometry has been simulated with the LB Method based on the D2Q9 model for analyzing stream lines, dimensionless velocity field of fluid flow, solid particles ...  Read More

Dynamic response of a shaft of a Pelton turbine due to impact of water jet

Mahesh Luintel; Tri Ratna Bajracharya

Volume 10, Issue 1 , September 2020, , Pages 73-84

  Performance and reliability of any rotating machine can be studied by proper dynamic analysis of the machine. In this regard, this paper presents the method to study the dynamic response of the shaft of a Pelton turbine due to the impact of water jet. Equations of motion for the bending vibration of ...  Read More

Computational Fluid Dynamics (CFD)
Influence of insertion of holes in the middle of obstacles on the flow around a surface-mounted cube

brahim Rostane; ALIANE KHALED; said Abboudi

Volume 9, Issue 1 , September 2019, , Pages 77-87

  The aim of our study is to analyze the impact of insertion holes in the middle of obstacles on the flow around a surface-mounted cube, In order to do this; we studied four configurations of obstacles in a channel with a Reynods number based on obstacle height ReH = 40000. The hexahedral structured meshes ...  Read More

Dissimilar friction stir lap welding of Al-Mg to CuZn34: Application of grey relational analysis for optimizing process parameters

Saman Khalilpourazary; Reza Abdi Behnagh; Ramezanali Mahdavinejad; Nasib Payam

Volume 4, Issue 1 , December 2014, , Pages 81-88

  This study focused on the optimization of Al—Mg to CuZn34 friction stir lap welding (FSLW) process for optimal combination of rotational and traverse speeds in order to yield favorable fracture load using Grey relational analysis (GRA). First, the degree of freedom was calculated for the system. ...  Read More

Dynamic Response
Effects of asymmetric stiffness on parametric instabilities of rotor

Chandan Kumar; Vikas Rastogi Rastogi

Volume 1, Issue 2 , June 2012, , Pages 119-128

  This work deals with effects of asymmetric stiffness on the dynamic behaviour of the rotor system. The analysis is presented through an extended Lagrangian Hamiltonian mechanics on the asymmetric rotor system, where symmetries are broken in terms of the rotor stiffness. The complete dynamics of asymmetries ...  Read More

Manufacturing Processes
Optimizing turning operation of St37 steel using grey relational analysis

S. Khalilpourazary; P. M. Kashtiban; N. Payam

Volume 3, Issue 2 , June 2014, , Pages 135-144

  Nowadays, in order to reach minimum production cost in machining operations, various optimization methods have been proposed. Since turning operation has different parameters affecting the workpiece quality, it was selected as a complicated manufacturing method in this paper. To reach sufficient quality, ...  Read More

Meshless Numerical Methods
Incompressible laminar flow computations by an upwind least-squares meshless method

M. Y. Hashemi

Volume 5, Issue 2 , June 2016, , Pages 147-160

  In this paper, the laminar incompressible flow equations are solved by an upwind least-squares meshless method. Due to the difficulties in generating quality meshes, particularly in complex geometries, a meshless method is increasingly used as a new numerical tool. The meshless methods only use clouds ...  Read More

Composite Materials
Elastoplastic torsion of hollow FGM circular shaft

Y. Bayat; H. Ekhteraei Toussi

Volume 4, Issue 2 , June 2015, , Pages 165-180

  In many cases, a torsional shaft may be a thick-walled radially inhomogeneous cylindrical object. The hollow shafts made of functionally graded materials (FGMs) are such kind of compositions which were studied in this paper. Cylindrical FG shafts are composed of ceramic and metallic parts with power ...  Read More

Fluid Mechanics
Numerical investigation of vertical and horizontal baffle effects on liquid sloshing in a rectangular tank using an improved incompressible smoothed particle hydrodynamics method

Rahim Shamsoddini

Volume 8, Issue 2 , February 2019, , Pages 175-186

  Liquid sloshing is a common phenomenon in the transporting of liquid tanks. Liquid waves lead to fluctuating forces on the tank wall. If these fluctuations are not predicted or controlled, they can lead to large forces and momentum. Baffles can control liquid sloshing fluctuations. One numerical method, ...  Read More

Computational Fluid Dynamics (CFD)
Effect of concentric and eccentric porous layer on forced convection heat transfer and fluid flow around a solid cylinder.

Alireza Alinezhad; Ataallah Soltani Goharrizi; Ataallah Kamyabi

Volume 13, Issue 2 , March 2024, , Pages 191-206

  In this paper, heat transfer and fluid flow around a solid cylinder wrapped with a porous layer in the channel were studied numerically by computational fluid dynamics (CFD). The homogeneous concentric and eccentric porous medium round a rigid, solid cylinder are supposed at local thermal equilibrium. ...  Read More