Rajitha Aluru, Michael Keefe and Suresh Advani
Injection molding is a very mature technology, but the growth of layer‐build, additive, manufacturing technologies (rapid prototypying) has the potential of expanding injection…
Abstract
Injection molding is a very mature technology, but the growth of layer‐build, additive, manufacturing technologies (rapid prototypying) has the potential of expanding injection molding into areas not commercially feasible with traditional molds and molding techniques. This integration of injection molding with rapid prototyping has undergone many demonstrations of potential. What is missing is the fundamental understanding of how the modifications to the mold material and mold manufacturing process impact both the mold design and the injection molding process. This work expanded on an approach to utilize current numerical simulation programs and created a tool for optimizing the creation and use of non‐metal molds for injection molding. Verification and validation work is presented. The model was exercised by studying the effect of varying the thermal conductivity on final‐part distortions. This work clearly showed that one could not obtain reasonable results by simply changing a few input parameters in the current simulations. Although the approach did produce more realistic results, more work will be required for a tool capable of accurate, quantitative predictions.
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Rahul Gadekar, Kiran Thakur and Peng Hwa Ang
The purpose of this exploratory study is to look at how the Internet was used by political parties and candidates during the Indian parliamentary elections of 2009.
Abstract
Purpose
The purpose of this exploratory study is to look at how the Internet was used by political parties and candidates during the Indian parliamentary elections of 2009.
Design/methodology/approach
A total of 31 web sites belonging to political parties and their candidates in the Indian states of Maharashtra and Gujarat were examined for how they were used to mobilize volunteers and voters. An online questionnaire and in‐depth interviews were administered to the web site coordinators/designers and politicians.
Findings
The study found that sites were not used to their maximum potential but instead, merely for publicity, online presence, and to explore the new medium. There was greater reliance by most candidates on traditional media such as rallies and face‐to‐face interaction. The reason may be due to the limited Internet penetration in India, which also means the Internet may have less influence on voters. Some candidates have shown the way to the potential use of the medium for fund raising and recruiting volunteers. But Indian politicians will likely continue to be cautious in using the Internet.
Research limitations/implications
This study was limited to the states of Maharashtra and Gujarat and did not consider the impact or the effectiveness of the Internet.
Originality/value
This is the first such study of the use of web sites for electioneering in India. It also documents the development in the use of the new medium for campaigning in 2009 as compared with the elections of 2004.
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This paper gives a bibliographical review of the finite element methods (FEMs) applied to the analysis of ceramics and glass materials. The bibliography at the end of the paper…
Abstract
This paper gives a bibliographical review of the finite element methods (FEMs) applied to the analysis of ceramics and glass materials. The bibliography at the end of the paper contains references to papers, conference proceedings and theses/dissertations on the subject that were published between 1977‐1998. The following topics are included: ceramics – material and mechanical properties in general, ceramic coatings and joining problems, ceramic composites, ferrites, piezoceramics, ceramic tools and machining, material processing simulations, fracture mechanics and damage, applications of ceramic/composites in engineering; glass – material and mechanical properties in general, glass fiber composites, material processing simulations, fracture mechanics and damage, and applications of glasses in engineering.
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Influence of the Hindu nationalist movement on politics and policy.
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DOI: 10.1108/OXAN-DB206900
ISSN: 2633-304X
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Geographic
Topical
The purpose of this study is to develop a homogenization approach that ensures both high accuracy and time-efficient solution for elastic-plastic functionally graded composites.
Abstract
Purpose
The purpose of this study is to develop a homogenization approach that ensures both high accuracy and time-efficient solution for elastic-plastic functionally graded composites.
Design/methodology/approach
The paper presents a novel two-stage hybrid homogenization approach that combines advantages of the mean field homogenization and homogenization based on the finite element method (FEM). The groundbreaking nature of the developed approach is associated with division of the hybrid homogenization procedure into two stages, which allows to very efficiently determine the solution for arbitrary volume fraction of the reinforcement. This paper concerns also on modelling of composites with randomly distributed prolate and oblate particles. For this purpose, the hybrid homogenization was implemented in the framework of the discrete orientation averaging procedure involving pseudo-grain discretization method.
Findings
Agreement between the results obtained using the proposed approach and the standard FEM-based homogenization is very good (up to the volume fraction of 0.3).
Originality/value
The proposed two-stage homogenization approach allows to obtain the solution for materials with arbitrary volume fraction of the reinforcement very efficiently; therefore, it is highly beneficial for the two-scale modeling of nonlinear functionally graded materials and structures.
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The purpose of this paper is to provide a case study of a global challenge: the relationship between commercial development and the protection of eco-fragile systems particularly…
Abstract
Purpose
The purpose of this paper is to provide a case study of a global challenge: the relationship between commercial development and the protection of eco-fragile systems particularly where river water is involved. It reviews and critiques the legal and political processes that underpinned the Commonwealth Games (CWG) 2010 in Delhi and the building of the accommodation Village on the floodplain of the river Yamuna.
Design/methodology/approach
The paper covers the controversial modern history of the Yamuna river that runs through Delhi. The river is “dead” and has been subject to litigation concerning its usage and that of its flood plain. In particular, the controversy peaked prior to the CWG 2010 in Delhi and the required buildings associated with the games. The paper traces the history of the legal actions and the inter-related involvement of the various actors being the politicians, construction developers, the river bank dwellers and the local environmentalists. Close analysis is made of the statutory administrative procedures required for environmental clearance, the subsequent case law both in the High Court of Delhi and the Supreme Court of India. Additionally, usage is made of the media and its concerns over corrupt and negligent practices.
Findings
The Indian judiciary in their willingness to promote the construction of the Village failed to apply its own environmental jurisprudence. There was a failure to “lift the veil” and review flawed administrative practices that violated governing statutes. National pride, time pressures, political support, economic interests and rapid urbanisation created a pressure that the courts could not challenge. It was left to investigative committees, after the Games had concluded, to expose these wrongdoings.
Originality/value
The paper highlights the issue of the relationship of the courts and political and economic interests and how legally protected ecological interests are ignored.
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This paper aims to comprehensively review ultrasonic additive manufacturing (UAM) process history, technology advancements, application areas and research areas. UAM, a hybrid 3D…
Abstract
Purpose
This paper aims to comprehensively review ultrasonic additive manufacturing (UAM) process history, technology advancements, application areas and research areas. UAM, a hybrid 3D metal printing technology, uses ultrasonic energy to produce metallurgical bonds between layers of metal foils near room temperature. No melting occurs in the process – it is a solid-state 3D metal printing technology.
Design/methodology/approach
The paper is formatted chronologically to help readers better distinguish advancements and changes in the UAM process through the years. Contributions and advancements are summarized by academic or research institution following this chronological format.
Findings
This paper summarizes key physics of the process, characterization methods, mechanical properties, past and active research areas, process limitations and application areas.
Originality/value
This paper reviews the UAM process for the first time.