Numerical analysis for force distribution along the swing jaw plate of a single toggle jaw crusher

2017 ◽  
Vol 14 (3) ◽  
pp. 255-260 ◽  
Author(s):  
B.B.V.L. Deepak ◽  
M.V.A. Raju Bahubalendruni
Keyword(s):  
Numerical Analysis ◽  
Motion Analysis ◽  
Kinematic Analysis ◽  
Design Methodology ◽  
Research Work ◽  
Movement Analysis ◽  
Force Distribution ◽  
Content Type ◽  
Jaw Crusher ◽  
Kinematic Characteristics

Purpose The purpose of this research work is helpful for recognizing the crushing characteristics of a single toggle jaw crusher during its operation. It is useful for designing a new prototype of this kind of machine with optimal dimensions of the jaw crusher frame and the crushing chamber. Design/methodology/approach The efficiency of the jaw crusher primarily depends on the kinematic characteristics of the swing jaw plate during the crushing process. The present research work deals with the kinematic analysis of the swing jaw plate of a single toggle jaw crusher. Findings During the analysis, the system is considered as a four-bar crank rocker mechanism. The force distribution is analyzed based on the results obtained from the motion analysis of the swing jaw plate. Originality/value The movement of the swing jaw plate is explained in detail while the machine is in operation. Kinematic analysis of the liner has been performed by considering some points along the swing jaw plate. The results obtained from the movement analysis of the swing jaw plate force distribution along the liner are analyzed. From this analysis, the chamber geometry can be optimized according to the requirement for the crushing motion of different zones in the crushing chamber.

Design and topological optimization of rear pressure bulkhead for a typical aircraft

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Marshal Thakran ◽  
Meenakshi ◽  
Jitender Sharma ◽  
Charles Gilbert Martin
Keyword(s):  
Numerical Analysis ◽  
Significant Influence ◽  
Design Methodology ◽  
Structural Integrity ◽  
Topological Optimization ◽  
Content Type ◽  
Iterative Design ◽  
Practical Implications ◽  
Insight Into ◽  
Selection Of

Purpose The purpose of this paper is to evaluate the model of a rear pressure bulkhead with different design optimizations to meet the pressurized cabin requirements of an aircraft. Design/methodology/approach This paper presents the results of the static analysis of a dome-shaped rear pressure bulkhead model designed in Catia-v5. Numerical analysis of model meshed in hyper-mesh and solved using Opti-Struct for iterative design optimizations. Findings All the iterative models are analyzed at 9 Psi. Rear pressure bulkhead designed with L-section stringer shows better results than the model optimized with T-section stringer for the same thickness. The model optimized with L-shaped stinger also reduces the weight of the bulkhead without affecting the structural integrity. Practical implications It has been concluded in this paper that the selection of specific shapes of the stringers shows a significant influence on weight reduction. Originality/value This paper provides a topical, technical insight into the design and development of a rear pressure bulkhead. It also outlines the future development of dome-shaped rear pressure bulkhead.

Autopilot design for an aircraft by using Luenberger observer design

2018 ◽  
Vol 90 (5) ◽  
pp. 858-868 ◽  
Author(s):  
Muhammad Taimoor ◽  
Li Aijun ◽  
Rooh ul Amin ◽  
Hongshi Lu
Keyword(s):  
Design Methodology ◽  
Research Work ◽  
Linear Quadratic Regulator ◽  
Observer Design ◽  
Linear Quadratic ◽  
Content Type ◽  
Luenberger Observer ◽  
Level Flight ◽  
Aerial Vehicle ◽  
The Cost

Purpose The purpose of this paper is to design linear quadratic regulator (LQR) based Luenberger observer for the estimation of unknown states of aircraft. Design/methodology/approach In this paper, the LQR-based Luenberger observer is deliberated for autonomous level flight of unmanned aerial vehicle (UAV) which has been attained productively. Various modes like phugoid and roll modes are exploited for controlling the rates of UAV. The Luenberger observer is exploited for estimation of the mysterious states of the system. The rates of roll, yaw and pitch are used as an input to the observer, while the remaining states such as velocities and angles have been anticipated. The main advantage of using Luenberger observer was to reduce the cost of the system which has been achieved lucratively. The Luenberger observer proposes sturdiness at the rate of completion to conquest over the turmoil and insecurities to overcome the privileged recital. The FlightGear simulator is exploited for the endorsement of the recital of the Luenberger observer-based autopilot. The level flight has been subjugated lucratively and has been legitimated by exploiting the FlightGear simulator. The authenticated and the validated results are offered in this paper. Microsoft Visual Studio has been engaged as a medium between the MATLAB and FlightGear Simulator. Findings The suggested observer based on LQR ensures the lucrative approximation of the unknown states of the system as well as the successful level flight of the system. The Luenberger observer is used for approximation of states while LQR is used as controller. Originality/value In this research work, not only the estimation of unknown states of both longitudinal and lateral model is made but also the level flight is achieved by using those estimated states and the autopilot is validated by using the FlightGear, while in most of the research work only the estimation is made of only longitudinal or lateral model.

Unfair dismissal in the Mauritius context: a comparative study

2018 ◽  
Vol 60 (6) ◽  
pp. 1299-1312
Author(s):  
Ambareen Beebeejaun
Keyword(s):  
Design Methodology ◽  
Research Work ◽  
Procedural Fairness ◽  
Content Type ◽  
Monetary Compensation ◽  
Unfair Dismissal ◽  
The Subject ◽  
The Law ◽  
Employment Rights ◽  
Practical Recommendations

Purpose The purpose of this study is to critically analyse the concept of unfair dismissal and to assess the extent to which the Employment Rights Act 2008 is affording protection to employees in Mauritius. The purpose of this study is to also demonstrate that as employees form an integral part of their workplace, their employment cannot be terminated without substantive and procedural fairness. The paper will provide some recommendations to cater for loopholes in existing Mauritius employment legislations. Design/Methodology/Approach To critically examine the topic, the black letter approach is adopted to detail legislations and judgments of courts on the subject matter. A comparative analysis with some other jurisdictions’ employment legislations is also carried out to define, explain and examine the concepts of dismissal, substantive causes such as misconduct and procedural fairness. Findings From the methodologies used, it is found that a substantial reason is not sufficient to conclude whether a dismissal is fair. The law of unfair dismissal has introduced some procedural safeguards to protect the employee from being unfairly and unjustifiably dismissed. The procedural requirements act as guidelines to employers and if they are not followed properly, the dismissal will be unfair. Unfair dismissal needs to be accompanied by remedies from employers, and monetary compensation has been found to be the most appropriate remedy. Originality/Value This paper is amongst the first research work conducted in Mauritius that compares the law of unfair dismissal and its implications with the laws of England and South Africa. The study is carried out with a view to provide practical recommendations in this area of employment law to the relevant stakeholders concerned.

The influence of legal framework on the Hellenic sector of public works

2018 ◽  
Vol 60 (5) ◽  
pp. 1196-1209
Author(s):  
Pavlos Metallinos
Keyword(s):  
Design Methodology ◽  
Research Work ◽  
Legal Framework ◽  
Public Works ◽  
Content Type ◽  
Legislative Framework ◽  
Annual Volume ◽  
Statistical Indicators ◽  
Total Circulation

Purpose This study aims to discover the motive for the time-to-time Hellenic collective capitalists’ intervention in the total circulation of capital of public works throughout the relative legislative framework. Thus the study attempts an original correlation of statistical indicators of Hellenic Statistical Authority with the legislative texts. Design/methodology/approach The Hellenic truth is that the branch of public works presents a peculiarity as far as the volume and quality of statistical facts and figures are concerned. To overcome this obstacle, this study analyzed the change of time series, relating the procedure of total circulation of contracting capital involved in public works with the content of the relative legislative rules which were applied during the period of 1958-2004 and their preambles. In this way, the annual volume of the constructional product in general is directly related with the particular characteristics that define the procedure of total circulation of the contracting capital in general. Findings The directly relation between the annual volume of the constructional Product in general and the particular characteristics that define the procedure of total circulation of the contracting capital in general, leads us to conclusions which, related with the policy and practices adopted by the collective capitalist, confirm or even set off eventual failures of respective conclusions drawn according to the prevailing concept. Originality/value By introducing the technique, the aim of this research work is achieved without reproducing the method of study and the conclusions of other researchers.

Understanding the motives of consumers of mezcal in Mexico

2018 ◽  
Vol 120 (7) ◽  
pp. 1643-1656 ◽  
Author(s):  
Carolina Andrea López-Rosas ◽  
Angélica Espinoza-Ortega
Keyword(s):  
Social Networking ◽  
Professional Education ◽  
Food Choice ◽  
Design Methodology ◽  
Research Work ◽  
Quality Criteria ◽  
Demographic Characteristics ◽  
Content Type ◽  
Factor And Cluster Analysis ◽  
And Cluster Analysis

Purpose The purpose of this paper is to characterize the consumers of mezcal in México based on their motivations, identifying different groups of consumers and their demographic characteristics. Design/methodology/approach A questionnaire based on the Food Choice Questionnaire was applied to 310 consumers: 154 directly to mezcal consumers in three “mezcalerías” (mezcal bars) and 156 through five social networking communities of mezcal consumers. The data obtained were analysed using multivariate statistics, factor and cluster analysis. Findings The results show that the search for tradition is the determining buying motivation, whereas quality seals do not exert a significant influence. Four profiles of mezcal consumers can be identified according to their consumption patterns: consumer linked to the territory, traditional consumer, consumer in transition and social consumer. The predominant demographic characteristics in the four consumer groups described a male, between 20 and 39 years old, single, childless, with professional education and employed. The overall results reveal a consumer who shares the quality criteria established by mescal-producing communities and is strongly interested in traditionally processed drinks. Originality/value In México, there are two important distilled drinks, tequila and mezcal. There is ample research on the first one, but there is less research on mezcal, despite it has an annual increase of 45 per cent in consumption. Most of the research work has been focused on aspects of diversity, sustainability and productivity, but there are not studies on the factors that affect mezcal consumption. Thus, this paper aims to characterize the consumers of mezcal, based on their motivations.

A family-enterprise collective certification trademark: consumer insight

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Anna Maria Nikodemska-Wolowik ◽  
Piotr Zientara ◽  
Anna Zamojska
Keyword(s):  
Family Business ◽  
Design Methodology ◽  
Family Firms ◽  
Research Work ◽  
Strong Relationship ◽  
Content Type ◽  
Family Enterprise ◽  
Negative Perceptions ◽  
Consumer Insight ◽  
Practical Implications

PurposeThe purpose of this study is to find out how consumers respond to a proposed family-enterprise collective certification trademark and how they perceive family firms in general.Design/methodology/approachThe paper employs a quantitative approach. It draws on a questionnaire survey conducted among 1,091 Polish consumers in January 2018. Statistical methods, such as exploratory factor analysis, were applied.FindingsPolish consumers responded positively to the proposed trademark. It also turned out that those who pay attention to the producer or the brand owner in a given sector also pay attention to the symbols placed on products or services from these sectors. There was a strong relationship between consumers' positive perceptions of family firms and their assessments of the proposed trademark. This did not extend to negative perceptions. The findings from this study may be generalisable to other post-communist societies.Practical implicationsFamily firms should redouble their efforts to introduce a family-enterprise collective certification trademark (not only in Poland, but also in those countries where such a trademark is non-existent). This should be handled by umbrella bodies for family business.Originality/valueLittle research work, based on a large and representative sample, has so far focussed on the issue of how consumers respond to a family-enterprise identity. The value of this study lies in deepening understanding of the processes and mechanisms that underlie the organisation–consumer relationship within the context of family-enterprise operation.

Analysis of the single toggle jaw crusher kinematics

2015 ◽  
Vol 13 (2) ◽  
pp. 213-239 ◽  
Author(s):  
Moses Frank Oduori ◽  
Stephen Mwenje Mutuli ◽  
David Masinde Munyasi
Keyword(s):  
Design Methodology ◽  
Loop Closure ◽  
Content Type ◽  
Drive Mechanism ◽  
Jaw Crusher ◽  
Closure Equation

Purpose – This paper aims to obtain equations that can be used to describe the motion of any given point in the swing jaw of a single toggle jaw crusher. Design/methodology/approach – The swing jaw drive mechanism of a single toggle jaw crusher is modelled as a planar crank and rocker mechanism with the swing jaw as the coupler link. Starting with the vector loop closure equation for the mechanism, equations of the position, velocity and acceleration of any given point in the swing jaw are obtained. Findings – Application of the kinematical equations that were obtained is demonstrated using the dimensional data of a practical single toggle jaw crusher. Thus, a description of the kinematics of any given point in the swing jaw of a single toggle jaw crusher is realized. Originality/value – The model of the single toggle jaw crusher mechanism as a planar crank and rocker mechanism is a realistic one. The equations obtained in this paper should be useful in further studies on the mechanics and design of the single toggle jaw crusher.

Collaboration in reverse: a conceptual framework for reverse logistics operations

2019 ◽  
Vol 68 (2) ◽  
pp. 482-504 ◽  
Author(s):  
Kumaraguru Mahadevan
Keyword(s):  
Conceptual Framework ◽  
Reverse Logistics ◽  
Design Methodology ◽  
Research Work ◽  
Consumer Electronics ◽  
Content Type ◽  
Erp System ◽  
Online Retailers ◽  
Tools And Techniques ◽  
Practical Implications

Purpose The purpose of this paper is to present the research carried out on the development of a conceptual framework termed as the reverse collaboration framework (RCF) to provide supply chain (SC) visibility and information sharing to practitioners in a reverse logistics (RL) operations. Design/methodology/approach The research methodology used in this research is a combination of concept mapping, and the extension of the work of other researchers (deductive approach) to develop a RCF that connects tools, techniques, systems and RL processes. Findings This research shows that by integrating tools, systems, tools and techniques with RL processes by means of the RCF will increase performance and productivity of a RL operations. This is demonstrated by applying the RCF to a consumer electronics business that proves that the time taken for the end to end RL operations is reduced by 20%. Research limitations/implications The RCF has been demonstrated with the data from a consumer electronics organisation. Literature points out that there are many different mathematical models for RL across a number of industries. Thus, at this stage, it is not clear if the RCF developed in this research will work in other industries, such as the newspaper, plastic bottles and online retailers industry where product returns are high. This research work can be extended in developing an IT solution by future researchers that can be linked to the main ERP system of an organisation. Practical implications SC managers can use the RCF in the extended form of an IT solution to manage the RL operations of their organisations. Originality/value There is a lack of research in the space of reverse collaboration in the broader field of SC management. This paper has fulfilled that gap.

Financial contagion: review of empirical literature

2018 ◽  
Vol 10 (1) ◽  
pp. 15-70 ◽  
Author(s):  
Neha Seth ◽  
Laxmidhar Panda
Keyword(s):  
Asset Allocation ◽  
Design Methodology ◽  
Empirical Studies ◽  
Research Work ◽  
Empirical Literature ◽  
Financial Contagion ◽  
Policy Makers ◽  
Content Type ◽  
The Past ◽  
Accurate Picture

Purpose The purpose of this paper is to obtain a comprehensive structure of past empirical studies on financial contagion which can provide the present growth and future scope of research work on the field of contagion analysis. Design/methodology/approach Present study identifies 151 empirical studies on financial contagion and summarises all the studies on the basis of tools and methodology used, year of the studies, origin of the studies, sample period and sample countries taken, studies undertaken on the basis of different crisis period and markets considered and finally sources of the studies. Findings The results of the analysis show that the empirical studies on contagion increased continuously over the past five years. Higher order test of contagion with more number of sample countries may provide more accurate picture on financial contagion. Originality/value This paper collects, classifies and summarises past empirical studies on financial contagion and provides valuable conclusion on present growth and future scope of studies on financial contagion. The information given in this paper can be helpful for future researchers and academicians on this particular field; the summary of the conclusion (from past reviews) may be helpful for the policy makers for asset allocation and risk management.

Internalization of ISO 9001: a longitudinal survey

2014 ◽  
Vol 114 (6) ◽  
pp. 872-885 ◽  
Author(s):  
Erlantz Allur ◽  
Iñaki Heras-Saizarbitoria ◽  
Martí Casadesús
Keyword(s):  
Dynamic Process ◽  
Design Methodology ◽  
Research Work ◽  
Longitudinal Survey ◽  
International Standards ◽  
Iso 9001 ◽  
Content Type ◽  
Early Adopters ◽  
Long Run ◽  
International Standards Organization

Purpose – The purpose of this paper is to analyze the influence of the motivation to adopt International Standards Organization (ISO) 9001 on both the internalization of the standard, namely the active day-to-day use of its main underlying practices, and the benefits obtained from its adoption. Similarly, the influence of the internalization on the benefits derived from ISO 9001 is analyzed. Design/methodology/approach – A longitudinal survey was carried out on a sample of 110 Spanish organizations that adopted the standard in its early phase of dissemination. These organizations were surveyed in 1999 and, 12 years later, in 2011. Findings – The results show that, contrary to the results of previous research work, early adopters driven by internal motives experience neither higher levels of internalization of ISO 9001 nor higher benefits from adoption of the standard. Nevertheless, there is clear evidence that in the long run a higher level of internalization leads to greater benefits from the adoption of ISO 9001. Originality/value – The adoption of ISO 9001 is a dynamic process in which certificating organizations play an important role.

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