Since tubes have numerous industrial applications, different attempts are focused on the Severe Plastic Deformation (SPD) processes of tubes. As an illustration, Tube Channel Pressing (TCP) is an attractive process for this purpose since it can be used for processing of different sizes of tubes. However, more attempts are needed to improve the outcomes of TCP. For example, imposing of greater s...

Finite element simulation of stretch flanging process was carried out in order to investigate the effect of process parameters on maximum thinning (%) in stretch flanging process. Influences of initial flange length, punch die clearance, width of sheet metal blank and blank holding force were investigated on maximum thinning (%). Finite element simulation was done using FEM software package ABA...

In diesem Beitrag präsentieren wir die Artefaktkarte, eine Verbindung aus einem angereicherten Glossar und einer Karte der Arbeitsumgebung. Die Artefaktkarte macht den Kontext der Arbeit unabhängig von der tatsächlichen Arbeitsumgebung verfügbar und das in konkreter Form, situiert und nahezu vollständig. Sie ermöglicht, notwendige Erhebungen zügig und strukturiert Weise durchzuführen, und unter...

and the sixtieth birthday of Dr. Heinrich Meng to whom it owes so much. The editor acknowledges also the stimulating influence by the International Congress held in London in 1948. The majority of the forty-three contributions deals with problems of social psychology and psychiatry; and the rest (in fact the two introductory sections) discuss a few selected problems of psycho-analysis and medic...

There are several method for forming bulk material, such as forging, rolling and extrusion. Every of these methods have advantages and dis-advantages of their selves. Forging process is one of the most common of them that include a die, press and in some case heater with controlling system, and has a special place in automotive, military and aerospace industries due uniformity of the final prod...

The assessment of the influence of the work-hardening of material on the optimum die profile and drawing force  in rod drawing process is the main objective of the present paper. The upper bound solution, based on the assumption of perfect plasticity, has been extended to consider the work-hardening of the material during the rod drawing process through curved dies. Analytical results of drawin...

OBJECTIVES The purpose of this study was to compare the accuracy of implant position transfer and surface detail reproduction using two impression techniques and materials. MATERIALS AND METHODS A metal model with two implants and three grooves of 0.25, 0.50 and 0.75 mm in depth on the flat superior surface of a die was fabricated. Ten regular-body polyether (PE) and 10 regular-body polyvinyl...

In this paper the eccentric forward extrusion of sections has been simulated and analyzed using FEM Abaqus-explicit. The results have been compared to those obtained from upper bound theorem and experimental works. Close agreements was observed between the FEM and experimental work and as compared with the upper bound data more realistic and better predictions were made by the authors’ method. ...