Interaction between compatibility and lubricity in metal forming.

The Relationship between Constant Friction Factor and Coefficient of Friction in Metal Forming using Finite Element Analysis

Frictional shear stress is usually determined by utilizing the coefficient of friction or the constant friction factor models. The present study deals with finite element analysis of double cup extrusion process to determine the relationship between constant friction factor (m) and coefficient of friction (µ), since the metal flow in this process is very sensitive to frictional conditions. Ther...

Prediction of Instability in Planar Anisotropic Sheet Metal Forming Processes

In this paper instability of planar anisotropic sheet metal during a few forming processes is investigated for the first time. For this reason components of the constitutive tangent tensor for planar anisotropic sheets are developed. By using the above tensor location of necking is predicted. Direction of the shear band is also predicted using the acoustic tensor. A finite element program is pr...

cohesion and cohesive devices in a contrastive analysis between ge and esp texts

the present study was an attempt to conduct a contrastive analysis between general english (ge) and english for specific purposes (esp) texts in terms of cohesion and cohesive devices. to this end, thirty texts from different esp and ge textbooks were randomly selected. then they were analyzed manually to find the frequency of cohesive devices. cohesive devices include reference, substitution, ...

Synergistic Interaction between Helix-Forming Polysaccharide and Konjac Glucomannan

A Study on the Interaction between Form and Content of Metal Kashkuls in the Safavid and Qajar Periods

The establishment of Safavid dynasty in Iran and the prevalence of etiquettes attributed to Sufis required making kashkuls (Sufi begging bowl), as one of the qalandars’ and dervishes’ instruments used at ceremonies and related events of such a sect. The purpose of this study is to study the form and content of 34 metal kashkuls from the Safavid as well as the following era, Qajar. Here there ar...