Shantaram Dond, Hitesh Choudhary, Tanmay Kolge, Archana Sharma and G.K. Dey
An electromagnet that can produce strong pulsed magnetic fields at kHz frequencies is potentially very favourable to exert a Lorentz force on the metallic workpiece. One of the…
Abstract
Purpose
An electromagnet that can produce strong pulsed magnetic fields at kHz frequencies is potentially very favourable to exert a Lorentz force on the metallic workpiece. One of the applications of the pulsed magnetic field is the electromagnetic forming where the design of robust electromagnet is critical. The purpose of this paper is to design a robust electromagnet (coil) for high velocity electromagnetic tube forming operation.
Design/methodology/approach
First of all, an analytical model is developed to design the electromagnet and predict the aluminium tube velocity under the action of the estimated pulsed magnetic field. Next, the finite element-based numerical model is used to test the robustness of the designed coil and validate the analytical model. The coil is fabricated and implemented for free forming of aluminium tube. Experimental results of tube displacement are further compared with numerical and analytical model results.
Findings
The experimental tube displacement results are showing a good match with analytical and numerical results. The designed electromagnet has generated a peak magnetic field around 14 T at 20 µs rise time and deformed the aluminium tube with a peak velocity of 160 m/s. Robustness of the electromagnet under the action of forming stress is insured by numerical stress analysis and experiments.
Practical implications
Though the designed model in this work is for the 2.4 mm aluminium tube forming, it can also be used for different tube materials, tube dimensions and other electromagnetic forming applications with some modifications.
Originality/value
The research results provide powerful theoretical, numerical simulation and experimental support for the robust electromagnet design.
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A. Giannoglou, A. Kladas, J. Tegopoulos, A. Koumoutsos, D. Manolakos and A. Mamalis
Undertakes an analysis of electromagnetic forming process. Despite the fact that it is an old process, it is able to treat current problems of advanced manufacturing technology…
Abstract
Undertakes an analysis of electromagnetic forming process. Despite the fact that it is an old process, it is able to treat current problems of advanced manufacturing technology. Primary emphasis is placed on presentation of the physical phenomena, which govern the process, as well as their numerical representation by means of simplified electrical equivalent circuits and fully coupled fields approach of the electromagnetic‐mechanical‐electric phenomena involved. Compares the numerical results with measurements. Finally, draws conclusions and perspectives for future work.
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Jun Tu, Tao Chen, Zhi Xiong, Xiaochun Song and Songling Huang
The aim of this paper is to better understand the generation and transmission mechanism of the electromagnetic acoustic transducer (EMAT).
Abstract
Purpose
The aim of this paper is to better understand the generation and transmission mechanism of the electromagnetic acoustic transducer (EMAT).
Design/methodology/approach
A semi-analytical method was used to calculate the Lorentz force. Both the hypothetical magnetic field mirror method and the diffusion equation were adopted to solve the eddy current distribution by variables separation method in time domain. A three-dimension magnetostatic finite element model was used to calculate the static magnetic field and the relative permeability. And an experimental platform with a piezoelectric probe to generate and an EMAT to receive, the ultrasonic wave was set up to verify the distribution of the Lorentz force.
Findings
The Lorentz force at different time and in different positions of the steel plate can be easily calculated. The experimental results show a good agreement with the analytical results.
Originality/value
The accurate prediction of the Lorentz force provides an insight into the physical phenomenon of EMAT and a powerful tool to design optimum EMAT.
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Asif Qumer Gill, Ali Braytee and Farookh Khadeer Hussain
The aim of this paper is to report on the adaptive e-contract information management reference architecture using the systematic literature review (SLR) method. Enterprises need…
Abstract
Purpose
The aim of this paper is to report on the adaptive e-contract information management reference architecture using the systematic literature review (SLR) method. Enterprises need to effectively design and implement complex adaptive e-contract information management architecture to support dynamic service interactions or transactions.
Design/methodology/approach
The SLR method is three-fold and was adopted as follows. First, a customized literature search with relevant selection criteria was developed, which was then applied to initially identify a set of 1,573 papers. Second, 55 of 1,573 papers were selected for review based on the initial review of each identified paper title and abstract. Finally, based on the second review, 24 papers relevant to this research were selected and reviewed in detail.
Findings
This detailed review resulted in the adaptive e-contract information management reference architecture elements including structure, life cycle and supporting technology.
Research limitations/implications
The reference architecture elements could serve as a taxonomy for researchers and practitioners to develop context-specific service e-contract information management architecture to support dynamic service interactions for value co-creation. The results are limited to the number of selected databases and papers reviewed in this study.
Originality/value
This paper offers a review of the body of knowledge and novel e-contract information management reference architecture, which is important to support the emerging trends of internet of services.
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Recycling of non‐renewable resources serves both in reducing the consumption of virgin supplies and the discharge of associated residuals back into the natural environment. On the…
Abstract
Purpose
Recycling of non‐renewable resources serves both in reducing the consumption of virgin supplies and the discharge of associated residuals back into the natural environment. On the other hand, recycling has been criticized because of its environmental impacts. The aim of the present paper is to identify and quantify the environmental effect of recycling of a glass bottle.
Design/methodology/approach
For this purpose, the life cycle assessment polygon framework is being used. This framework has been developed for evaluating the results of a life cycle inventory analysis using critical volume aggregation and polygon‐based interpretation.
Findings
Recycling strategies can, in most cases, reduce the total environmental burden of the glass container examined. However, this reduction may considerably vary in relation to each “ecological parameter” (consumption of energy, consumption of water, air emissions, waterborne waste and solid waste), depending mainly on the “recycling mix” (the percentage of recycled material used in production and the percentage of product waste that goes for recycling).
Research limitations/implications
The extent to which these findings could be generalized to other materials and products could be confirmed by more applications of the framework.
Practical implications
This paper may help in developing recycling strategies.
Originality/value
A conceptual framework for the environmental evaluation of recycling, considering, not only general recycling targets, but also the particular interests or conditions that may exist, is introduced.
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In recent years, many manufacturing companies are attempting to implement lean manufacturing systems (LMS) as an effective manufacturing strategy to survive in a highly…
Abstract
Purpose
In recent years, many manufacturing companies are attempting to implement lean manufacturing systems (LMS) as an effective manufacturing strategy to survive in a highly competitive market. Such a process of selecting a suitable manufacturing system is highly complex and strategic in nature. The paper aims to how companies make a strategic decision of selecting LMS as part of their manufacturing strategy, and on what basis such strategic decisions are made by the managers.
Design/methodology/approach
A case study of a small‐ and medium‐sized enterprise is presented, in which the managers are contemplating on implementing either computer integrated manufacturing systems (CIMS) or LMS. To supplement the decision‐making process, a multi‐criteria decision making (MCDM) model, namely, the preference ranking organisation method for enrichment evaluations (PROMETHEE) is used to analyse how it will impact the stakeholders of the organisation, and the benefits gained.
Findings
An extensive analysis of PROMETHEE model revealed that LMS was the best for the given circumstances of the case.
Research limitations/implications
The same problem can be extended by incorporating the constraints (such as financial, technical, social) of the organisation by utilising an extended version of PROMETHEE called the PROMETHEE V. Since, a single case study approach has been utilised, the findings cannot be generalized for any other industry.
Practical limitations/implications
The methodology of PROMETHEE and its algorithm has been demonstrated in a detailed way and it is believed that it will be useful for managers to apply such MCDM tools to supplement their decision‐making efforts.
Originality/value
According to the authors’ knowledge there is no paper in the literature, which discusses the application of PROMETHEE in making a strategic decision of implementing LMS as a part of an organisation's manufacturing strategy.