shape error due to elastic recovery of formed part in unloading known as springback, is one of the most important problems of tool design in sheet metal forming processes. many researches have been performed for proposing an efficient method to decrease or compensate springback error in sheet forming processes. these methods are usually based on iterative finite element algorithms. in this pape...

this research work is devoted to the development of a mathematical model for the simulation of the flow of polymeric melts through the die region of extruders. a set of governing equations are solved using finite element method. standard galerkin technique is used in conjunction with the mixed scheme to solve the flow equation. due to the non-linear nature of global equations, the picard iterat...

Deep drawing is the process of obtaining three-dimensional containers certain depths and shapes under pressing forces with help molds sheet materials. In this study, numerical shaping rectangular cups in angled deep dies was investigated experimentally by using finite element method (FEM). For purpose, die/blank holder surfaces have α=0°, α=3°, α=6°, α=9°, α=12° α=15° angles order to facilitate...

| This paper is composed of two parts. The rst part surveys the literature regarding optimum nonlinear l-tering from the (continuous-time) stochastic analysis point of view, and the other part explores the impact of recent applications of neural networks (in a discrete-time context) to nonlinear ltering. In particular, the results obtained by using a regularized form of radial basis function (R...

The effect of squeeze casting process parameters on wear behavior of AC2A aluminium alloy was primarily investigated in this experimental study. Five process parameters, namely squeeze pressure, pouring temperature, die temperature, die material and compression time, each at four levels were chosen and sixteen experimental runs based on L16 orthogonal array were performed. From analysis of vari...

SUMMARY  An abnormal increase in serum potassium afte-r administration of suxamethonium is known to occur in the treatment of burns, trauma, teta­nus and neurological disorders. A table shows how long this abnormal reaction lasts approxi­mately in the different categories. A few cases of cardiac arrest following suxamethonium in­jection are described in detail. The pa;thogene­sis of this abnor...

in recent years, the hydroforming due to reduction in weight and increase in strength of automotive parts has attracted attention of the automotive industry. thus, the knowledge of the process to produce parts with desired quality and accuracy has been growing. one of the effective methods in improving the formability in the hydroforming is known as pulsating hydroforming. however, the reason o...