Research Paper Fluid Mechanics
A comparative study between two numerical solutions of the Navier-Stokes equations

M. Alemi; R. Maia

Volume 6, Issue 2 , June 2017, Pages 1-12

  The present study aimed to investigate two numerical solutions of the Navier-Stokes equations. For this purpose, the mentioned flow equations were written in two different formulations, namely (i) velocity-pressure and (ii) vorticity-stream function formulations. Solution algorithms and boundary conditions ...  Read More

Research Paper Composite Materials
Influence of heat generation on the phase transformations and impact responses of composite plates with embedded SMA wires

A. Niknami; M. Shariyat

Volume 6, Issue 2 , June 2017, Pages 13-26

  In the present research, in contrast to the available papers, not only the superelasticity but also the shape memory effects are taken into account in determination of the impact responses. At the same time, in addition to modifying Brinson’s model for the shape memory alloys (SMAs), to include ...  Read More

Research Paper Heat and Mass Transfer
Chemical reaction and thermal radiation effects on MHD micropolar fluid past a stretching sheet embedded in a non-Darcian porous medium

L. Ramamohan Reddy; M. C. Raju; G. S. S. Raju; S. M. Ibrahim

Volume 6, Issue 2 , June 2017, Pages 27-46

  The paper aims at investigating the effects of chemical reaction and thermal radiation on the steady two-dimensional laminar flow of viscous incompressible electrically conducting micropolar fluid past a stretching surface embedded in a non-Darcian porous medium. The radiative heat flux is assumed to ...  Read More

Research Paper Forming
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

Research Paper Fatigue
Assessment of different methods for fatigue life prediction of steel in rotating bending and axial loading

J. Amirian; H. Safari; M. Shirani; M. Moradi; S. Shabani

Volume 6, Issue 2 , June 2017, Pages 57-68

  Generally, fatigue failure in an element happens at the notch on a surface where the stress level rises because of the stress concentration effect. The present paper investigates the effect of a notch on the fatigue life of the HSLA100 (­high strength low alloy) steel which is widely applicable in ...  Read More

Research Paper Fluid Mechanics
Water hammer simulation by explicit central finite difference methods in staggered grids

F. Khalighi; A. Ahmadi; A. Keramat

Volume 6, Issue 2 , June 2017, Pages 69-77

  Four explicit finite difference schemes, including Lax-Friedrichs, Nessyahu-Tadmor, Lax-Wendroff and Lax-Wendroff with a nonlinear filter are applied to solve water hammer equations. The schemes solve the equations in a reservoir-pipe-valve with ...  Read More

Research Paper Robotics
Dynamical formation control of wheeled mobile robots based on fuzzy logic

k. Alipour; m. Ghiasvand; B. Tarvirdizadeh

Volume 6, Issue 2 , June 2017, Pages 79-91

  In this paper, the important formation control problem of nonholonomic wheeled mobile robots is investigated via a leader-follower strategy. To this end, the dynamics model of the considered wheeled mobile robot is derived using Lagrange equations of motion. Then, using ADAMS multi-body simulation software, ...  Read More

Research Paper Vibration
An efficient finite difference time domain algorithm for band structure calculations of Phononic crystal

M. Moradi; M. Bagheri Nouri

Volume 6, Issue 2 , June 2017, Pages 93-101

  In this paper, a new algorithm for studying elastic wave propagation in the phononic crystals is presented. At first, the displacement-based forms of elastic wave equations are derived and then the forms are discretized using finite difference method. So the new algorithm is called the displacement-based ...  Read More

Research Paper Vibration
Vibration analysis of functionally graded cylindrical shells with different boundary conditions subjected to thermal loads

M. Talebitooti; M. Ghasemi; S. M. Hosseini

Volume 6, Issue 2 , June 2017, Pages 103-114

  In the present work, study of the vibration of a functionally graded (FG) cylindrical shell made up of stainless steel, zirconia, and nickel is presented. Free vibration analysis is presented for FG cylindrical shells with simply supported-simply supported and clamped–clamped boundary condition ...  Read More

Research Paper Fatigue
Enhancing the low cycle fatigue strength of AA6061 aluminum alloy by using the optimized combination of ECAP and precipitation hardening

M. Jooybari; J. Shahbazi Karami; M. Sheikhi

Volume 6, Issue 2 , June 2017, Pages 115-127

  In the present study, mechanical properties and low cycle fatigue behavior of a solid-solutionized AA6061 aluminum alloy produced by equal channel angular pressing (ECAP) process were investigated. The grain refinement after two passes of ECAP significantly increased the yield stress and ultimate tensile ...  Read More