Research Paper Optimization
1. Simultaneous allocation of reliability & redundancy using minimum total cost of ownership approach

G. Kanagaraj; N. Jawahar

Volume 1, Issue 1 , Summer and Autumn 2011, Pages 1-16

  This paper addresses the mixed integer reliability redundancy allocation problems to determine simultaneous allocation of optimal reliability and redundancy level of components based on three objective goals. System engineering principles suggest that the best design is the design that maximizes the ...  Read More

Research Paper Pressure Vessels
2. Dynamic simulation of a high pressure regulator

A. R. Shahani*; H. Esmaili; A. Aryaei; S. Mohammadi; M. Najar

Volume 1, Issue 1 , Summer and Autumn 2011, Pages 17-28

  In this paper, the dynamic simulation for a high pressure regulator is performed to obtain the regulator behavior. To analyze the regulator performance, the equation of motion for inner parts, the continuity equation for diverse chambers and the equation for mass flow rate were derived. Because of nonlinearity ...  Read More

Research Paper Control
3. Variational discretization and mixed methods for semilinear parabolic optimal control problems with integral constraint

Zuliang Lu*

Volume 1, Issue 1 , Summer and Autumn 2011, Pages 29-36

  The aim of this work is to investigate the variational discretization and mixed finite element methods for optimal control problem governed by semi linear parabolic equations with integral constraint. The state and co-state are approximated by the lowest order Raviart-Thomas mixed finite element spaces ...  Read More

Research Paper Fracture Mechanics
4. Finite element prediction of ductile fracture in automotive panel forming: comparison between FLD and lemaitre damage models
Volume 1, Issue 1 , Summer and Autumn 2011, Pages 37-44

  In sheet metal forming processes with complex strain paths, a part is subjected to large plastic deformation. This severe plastic deformation leads to high plastic strain localization zones and subsequent accumulation of those strains. Then internal and superficial micro-defects and in other words ductile ...  Read More

Research Paper Manufacturing Processes
5. Experimental and numerical investigation on laser bending process
Volume 1, Issue 1 , Summer and Autumn 2011, Pages 45-52

  Laser bending is an advanced process in sheet metal forming in which a laser heat source is used to shape the metal sheet. In this paper, temperature distribution in a mild steel sheet metal is investigated numerically and experimentally. Laser heat source is applied through curved paths in square sheet ...  Read More

Research Paper Robotics
6. Coordinate influence on singularity of a 3-ups parallel manipulator
Volume 1, Issue 1 , Summer and Autumn 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

Research Paper Plates and Shells
7. Effect of boundary conditions on localized instability of the semi-infinite orthotropic plate
Volume 1, Issue 1 , Summer and Autumn 2011, Pages 59-68

  This paper is concerned with an investigation into the localized instability of a thin elastic orthotropic semi-infinite plate. In this study, a semi-infinite plate, simply supported on two edges and under different boundary conditions of clamped, hinged, sliding contact and free on the other edge, is ...  Read More