Modelling Central Consolidation during Hot Rolling of Cast Products

2016 ◽  
Vol 716 ◽  
pp. 728-735 ◽  
Author(s):  
Didier Farrugia
Keyword(s):  
Steel Grade ◽  
Roll Design ◽  
Minimum Area ◽  
New Developments ◽  
Analytical Technique ◽  
Area Reduction ◽  
Pass Schedule ◽  
Recent Trends ◽  
Roll Gap ◽  
Cast Products

Extending the range of finished product sizes from a given ingot or concast bloom or billet section is often limited by the minimum area reduction required to ensure effective central consolidation and final mechanical properties. Predicting effective consolidation or level of remnant porosity for a range of steel grade, billet size, pass schedule/roll design and thermo-mechanical conditions has always been an important issue on plant, much more lately in view of recent trends for larger ingots and development of combined forging/rolling strategies. This paper will focus primarily on a fast analytical technique based on roll gap shape and consolidation factors obtained from Finite Element (FEM) Models. New developments based on FEM submodelling are presented briefly. Healing capabilities based on diffusion bonding can be obtained from [1-3].

Study on Asymmetrical Sheet Rolling by the Finite Element Method

1999 ◽  
Vol 15 (4) ◽  
pp. 149-155 ◽  
Author(s):  
Yeong-Maw Hwang ◽  
Dyi-Cheng Chen ◽  
Gow-Yi Tzou
Keyword(s):  
Finite Element ◽  
Rolling Force ◽  
Speed Ratio ◽  
Element Analysis ◽  
Sheet Rolling ◽  
Useful Knowledge ◽  
Pass Schedule ◽  
The Finite Element Analysis ◽  
Series Of Experiments ◽  
Roll Gap

AbstractAdopting the DEFORM software for the finite element analysis, this study simulated steady-state plastic deformation of the sheet at the roll-gap during asymmetrical sheet rolling. Using FEM code DEFORM, the effects of roll speed ratio, roll radius ratio, friction factor ratio upon the curvature of the rolled product and rolling force were systematically discussed. With a view to verifying the validity of the study simulated, a series of experiments on asymmetrical cold sheet rolling using Aluminum sheet as specimen are carried out. The comparisons between numerical and experimental results show good agreement. Therefore, this numerical model using DEFORM software can offer useful knowledge for designing the pass-schedule of asymmetrical sheet rolling.

Recent trends and new developments in the treatment of homosexuality.

Psychotherapy ◽  
1975 ◽  
Vol 12 (1) ◽  
pp. 83-92 ◽  
Author(s):  
James J. Hinrichsen ◽  
Martin Katahn
Keyword(s):  
New Developments ◽  
Recent Trends

Class Discourse in Croatia

2015 ◽  
Vol 29 (3) ◽  
pp. 663-671 ◽  
Author(s):  
Marko Grdešić
Keyword(s):  
Public Sphere ◽  
Class Analysis ◽  
New Developments ◽  
The Public ◽  
Recent Trends ◽  
Younger Generation ◽  
The Public Sphere ◽  
Academic Debate ◽  
Class Discourse

This article summarizes recent trends in Croatia with regard to class analysis and class discourse. It traces the main currents both in academic debate as well as more broadly in the public sphere. Issues of class were sidelined with the outbreak of war and the rise of nationalism in the 1990s. Later, neoliberalism further weakened class and leftist discourse. Research on class has been sporadic and rare. New developments among a younger generation of leftist activists and scholars have begun to challenge the silence on class, but the main trends have not been reversed.

scholarly journals Advances in Structural Systems for Tall Buildings: Emerging Developments for Contemporary Urban Giants

Buildings ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 104 ◽  
Author(s):  
Mir Ali ◽  
Kyoung Moon
Keyword(s):  
Tall Buildings ◽  
Structural Systems ◽  
Widespread Application ◽  
New Developments ◽  
Retrospective Survey ◽  
Complex Design ◽  
Specific Complex ◽  
Recent Trends ◽  
Design Requirements ◽  
Modified Forms

New developments of tall buildings of ever-growing heights have been continuously taking place worldwide. Consequently, many innovations in structural systems have emerged. This paper presents a retrospective survey of the main structural systems for tall buildings with emphasis on the advancements of recent, emerging, and potentially emerging systems. A structural systems chart that was previously developed by the authors has been updated in this paper to recognize, categorize and add the more recent structural systems. Recent trends of tubular structural systems in modified forms including the braced megatubes and diagrids are presented. Core-outrigger structural systems are discussed with emphasis on their adaptability. The potential of employing superframes for stand-alone and conjoined megatall buildings is predicted. As a means to solve today’s various project-specific complex design requirements, different mixed structural systems for supertall and megatall buildings are presented. This paper also discusses the widespread application of composite structural systems and recent trends of concrete cores for contemporary tall buildings. Finally, the future of tall buildings is predicted as the race for height continues.

scholarly journals What Do We Know About Black and Minority Ethnic (BAME) Participation in UK Higher Education?

2021 ◽  
pp. 1-14
Author(s):  
Jason Arday ◽  
Charlotte Branchu ◽  
Vikki Boliver
Keyword(s):  
Higher Education ◽  
Group Differences ◽  
Policy Makers ◽  
New Developments ◽  
Academic Communities ◽  
Ethnic Group Differences ◽  
Recent Trends ◽  
Uk Higher Education ◽  
The Impact ◽  
Minority Ethnic

Here, we offer a synthesis of recent evidence and new developments in relation to three broad aspects of Black and minority ethnic (BAME) students’ participation in UK higher education (HE). First, we examine recent trends in ethnic group differences in rates of access to, success within, and positive destinations beyond HE. Secondly, we examine the nature of UK universities as exclusionary spaces which marginalise BAME students in a myriad of ways, not least through curricula that centre Whiteness. Finally, we consider the impact of the marginalisation of BAME students on mental health. We argue that progress towards race equality in each domain has been hampered by white-centric discourses which continue to identify BAME students and staff as ‘other’. We highlight the important roles that academic communities and HE policy-makers have to play in advancing ethnic equality in UK universities.

Smart Cities: A Survey on New Developments, Trends, and Opportunities

2020 ◽  
Vol 05 (03) ◽  
pp. 311-326 ◽  
Author(s):  
Seyed Mahdi Bohloul
Keyword(s):  
Augmented Reality ◽  
21St Century ◽  
Urban Areas ◽  
Smart Cities ◽  
New Developments ◽  
Business Opportunities ◽  
Alternative Version ◽  
Great Progress ◽  
Recent Trends ◽  
Made In

The continued growth of the population in urban areas has called for smarter cities for the 21st century. While great progress has been made in the last two decades in this regard, remaining challenges faced by city planners have forced them to pursue an alternative version of smart cities. Recent advancements in several technological areas like 5G communications, blockchain, and virtual/augmented reality have facilitated this process. This paper aims at providing a review of the definitions and components of current smart cities. It also discusses new developments, recent trends, and business opportunities.

scholarly journals Recent trends in metaheuristics for stochastic combinatorial optimization

2011 ◽  
Vol 1 (1) ◽  
Author(s):  
Walter Gutjahr
Keyword(s):  
Combinatorial Optimization ◽  
Mathematical Programming ◽  
Recent Literature ◽  
Literature Survey ◽  
New Developments ◽  
Multi Objective ◽  
Stochastic Combinatorial Optimization ◽  
Short Overview ◽  
Recent Trends

AbstractThis short overview is an addendum to a recent literature survey by Bianchi et al. on metaheuristics for stochastic combinatorial optimization (SCO). It outlines some new developments that occurred in this field during the last few years. Special attention is given to multi-objective SCO as well as to combinations of metaheuristics with mathematical programming.

Process Chromatography

1979 ◽  
Vol 12 (10) ◽  
pp. 422-426 ◽  
Author(s):  
F. H. Huyten
Keyword(s):  
Process Industry ◽  
New Developments ◽  
Analytical Technique ◽  
Future Needs ◽  
On Line ◽  
Near Future

Process chromatography has become the most important on-line analytical technique in process industry and there is little doubt that in the near future its position will become even more outstanding. New developments, especially the application of microprocessors, will lead to a further increase in reliability, capabilities and sophistication. The paper discusses the reasons why expensive analysers such as process chromatographs are installed to such an extent. It examines their advantages and shortcomings and indicates future needs and trends.

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