Showing 3 results for Talebi
M. H. Shojaeefard, R. Talebitooti, M. Amirpour Molla, R. Ahmadi,
Volume 2, Issue 1 (1-2012)
Abstract
P. Hosseini Tehrani, M. Talebi,
Volume 2, Issue 3 (7-2012)
Abstract
In this paper, finite element elastic contact analysis of a functionally graded (FG) hollow brake disk in
contact with pad, subjected to rotation, contact pressure and frictional heat is presented. The material
properties vary through the thickness according to a power-law characterised by a grading index, n. The
material property is purely steel at the core part and gradually moves and approaches to the ceramic
properties at the surfaces of the FGM disk. In this task, thermal analyses are performed on two ventilated
disk brake one of them is constructed of functionally graded composite material and the other is a
homogeny disk brake which is constructed of steel alloy. In this study three-dimensional finite element
model and ABAQUS software is used. Through comparison of temperature and displacement fields the
benefits of using functionally graded material is investigated. It is shown that temperature variation in
FGM disk is much lower than steel disks, it may be concluded that FGMs disk restrain the growth of
thermal perturbation and delay the contact separation..
M.h. Shojaeefard, R. Talebitooti, S. Yarmohammadisatri, M. Torabi,
Volume 3, Issue 1 (3-2013)
Abstract
In this paper, a method based on binary-coded genetic algorithm is proposed to explore an optimization method, for obtaining an optimal elliptical tank. This optimization method enhances the rollover threshold of a tank vehicle, especially under partial filling conditions. Minimizing the overturning moment imposed on the vehicle due to c.g. height of the liquid load, lateral acceleration and cargo load shift are properly applied. In the process, the width and height of tanker are assumed as constant parameters. Additionally, considering the constant cross-sectional area, an optimum elliptical tanker of each filling condition is presented to provide more roll stability. Moreover, the magnitudes of lateral and vertical translation of the cargo within the proposed optimal cross section under a constant lateral acceleration field are compared with those of conventional elliptical tank to demonstrate the performance potentials of the optimal shapes. Comparing the vehicle rollover threshold of proposed optimal tank with that of currently used elliptical and circular tank reveals that the optimal tank is improved approximately 18% higher than conventional one.
