Research Paper Vibration
Optimal design of a vibration absorber for tremor control of arm in Parkinson's disease

Rouhollah Hosseini; Keikhosrow Firoozbakhsh; Hossein Naseri

Volume 3, Issue 2 , June 2014, Pages 85-94

  Because the underlying physiology of pathological tremor in a Parkinson's patient is not well understood, the existing physical and drug therapies have not been successful in tremor treatment. Different mathematical modeling of such vibration has been introduced to investigate the problem and reduce ...  Read More

Research Paper Fluid Mechanics
Numerical investigation of thermal mixing of shear thinning fluids in one-way opposing jets

P. R. Mashaei Mashaei; S. M. Hosseinalipour; K. Esmailpour

Volume 3, Issue 2 , June 2014, Pages 95-103

  In recent years, impinging streams have received increasing interest for their high efficiency in heat and mass transfer. This numerical study was conducted to investigate flow and heat transfer characteristics of one-way opposing jets of non-Newtonian fluids. Effects of Reynolds number impinging angle, ...  Read More

Research Paper Manufacturing Processes
Optimizing locomotive body structures using imperialist competitive algorithm

Mahdi Ghamami; Masoud Shariat Panahi; Maryam Rezaei

Volume 3, Issue 2 , June 2014, Pages 105-112

  In today's design, system complexity and increasing demand for safer, more efficient and less costly systems have created new challenges in science and engineering. Locomotives are products which are designed according to market order and technical needs of customers. Accordingly, targets of companies, ...  Read More

Research Paper Heat and Mass Transfer
Effects of heat generation/absorption on natural convection of nanofluids over the vertical plate embedded in a porous medium using drift-flux model

M. Ghalambaz; A. Noghrehabadi

Volume 3, Issue 2 , June 2014, Pages 113-123

  In this paper, natural convection heat transfer over a vertical plate in a Darcy porous medium saturated with a nanofluid subject to heat generation/absorption was theoretically studied. The governing partial differential equations were transformed to a set of ordinary differential equations using similarity ...  Read More

Research Paper Forming
Initial blank design of deep drawn orthotropic materials using inverse finite element method

Hashem Zamanian; Mehdi Bostan Shirin; Ahmad Assempour

Volume 3, Issue 2 , June 2014, Pages 125-134

  In this work, an inverse finite element formulation was modified for considering material anisotropy in obtaining blank shape and forming severity of deep drawn orthotropic parts. In this procedure, geometry of final part and thickness of initial blank sheet were known. After applying ideal forming formulations ...  Read More

Research Paper 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

Research Paper Control
Nonlinear static and dynamic behaviors of a microresonator under discontinuous electrostatic actuation

M. Zamanian; S. A. A. Hosseini

Volume 3, Issue 2 , June 2014, Pages 145-159

  This article studied static deflection, natural frequency and nonlinear vibration of a clamped-clamped microbeam under discontinues electrostatic actuation. The electrostatic actuation was induced by applying AC-DC voltage between the microbeam and electrode plate. In contrast to previous works, it was ...  Read More