Results 101 to 110 of about 31,118 (205)

A Comparison of Two-Roll and Three-Roll Cross Wedge Rolling Processes

open access: yesAdvances in Science and Technology Research Journal, 2023
openaire   +1 more source

Aerodynamic characteristics, including effect of body shape, of a Mach 6 aircraft concept [PDF]

open access: yes
Longitudinal aerodynamic characteristics for a hydrogen-fueled hypersonic transport concept at Mach 6 are presented. The model components consist of four bodies with identical longitudinal area distributions but different cross-sectional shapes and ...
Riebe, G. D.
core   +1 more source

Infrastructure performance and reform in developing and transition economies: evidence from a survey of productivity measures [PDF]

open access: yes
The authors review about 80 studies on electricity and gas, water and sanitation, and rail and ports (with a footnote on telecommunications) in developing countries.
Estache, Antonio   +2 more
core  

Subsonic investigations of vortex interaction control for enhanced high-alpha aerodynamics of a chine forebody/Delta wing configuration [PDF]

open access: yes
A proposed concept to alleviate high alpha asymmetry and lateral/directional instability by decoupling of forebody and wing vortices was studied on a generic chine forebody/ 60 deg.
Bhat, M. K., Rao, Dhanvada M.
core   +1 more source

Tax system and reforms in Europe: Spain [PDF]

open access: yes
This paper aims at discussing the main features of Spain’s tax system, its recent reforms and those underway. The current state of the main taxes, their future reforms are studied starting from 1975, when Spain shifted to democracy.
Davide Tondani
core  

Fast simulation of a flat cross wedge rolling process

open access: yes, 2013
In this paper, a new approach for a Fast Simulation of flat cross wedge rolling processes is presented. The approach is based on a preliminary research project of the Institute of Forming Technology and Machines (IFUM) of the Leibniz Universität Hannover, in which a software prototype for a Fast Simulation of a radial-axial ring rolling process was ...
Behrens, Bernd-Arno   +1 more
openaire   +1 more source

Numerical simulation and optimization of cross wedge rolling parameters

open access: yes, 2020
Çapraz kamalı haddeleme (ÇKH) silindirik iş parçalarını üretmek için kullanılan metal şekillendirme işlemdir. Bu yöntem, silindirik iş parçalarının merdaneler üzerine veya düz plakalar üzerine monte edilmiş çapraz iki kama arasında deforme edilerek eksenel simetrik şekil verme işlemidir.
openaire   +1 more source

Numerical simulations of material fracture in cross wedge rolling

open access: yesArchives of Civil and Mechanical Engineering
Abstract This paper relates to the issue of ductile fracture in forming processes. Particular emphasis is put on the problem of crack formation induced by the Mannesmann effect. For the accurate modelling of material fracture in cross wedge rolling (CWR), a new calibration test is proposed, which involves rotary compression (RC) of a tapered ...
openaire   +1 more source

Comparative analysis of cross-wedge rolling methods

open access: yesAdvances in Science and Technology Research Journal
Zbigniew Pater   +3 more
openaire   +1 more source

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