Satabdee Dash, Axel Nordin and Glenn Johansson
Dual design for additive manufacturing (DfAM) takes into account both the opportunities and constraints of AM simultaneously, which research shows is more effective than…
Abstract
Purpose
Dual design for additive manufacturing (DfAM) takes into account both the opportunities and constraints of AM simultaneously, which research shows is more effective than considering them separately. Unlike existing reviews, this paper aims to map DfAM research within the engineering design process, focusing solely on studies adopting dual DfAM. Additionally, it aims to suggest future research directions by analysing prominent research themes and their inter-relationships. Special emphasis is on theme inter-relationships concerning the conceptual, embodiment and detail design phases.
Design/methodology/approach
The study is based on a systematic literature review of 148 publications from January 2000 to February 2024. After screening, prominent research themes were identified and systematically analysed. Theme inter-relationships were explored using quantitative analysis and chord diagrams.
Findings
The findings reveal that studies either span the entire design process, the early design phases or the later design phases. Most research focuses on the later design phases, particularly within themes of design optimisation, design evaluation and AM-specific manufacturing constraints. The most frequent theme inter-relationship occurs between design optimisation and AM-specific manufacturing constraints. Overall, the findings suggest future research directions to advance dual DfAM research, such as development of design rules and guidelines for cellular structures.
Originality/value
This review proposes a model by mapping prominent themes of dual DfAM research in relation to the engineering design process. Another original contribution lies in analysing theme inter-relationships and visualising them using chord diagrams – a novel approach that did not exist before.
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Emma O'Brien and Thomas M. Cooney
While supporting entrepreneurship through government intervention has become a global phenomenon, the OECD (2021) has identified that several communities (including women, youth…
Abstract
Purpose
While supporting entrepreneurship through government intervention has become a global phenomenon, the OECD (2021) has identified that several communities (including women, youth, seniors, unemployed and immigrants) remain under-represented in terms of entrepreneurial activity. Inclusive entrepreneurship policies seek to enhance economic and social inclusion and emphasise the significant contribution that people from within these communities could make to local and regional development if appropriate support was offered. The purpose of this study is to examine how higher education institutions (HEIs) can co-create inclusive entrepreneurial training initiatives with local communities that support economic and social inclusion.
Design/methodology/approach
This in-depth qualitative study draws on the experiences of multiple stakeholders to highlight how an HEI can enhance entrepreneurial activity within under-represented and disadvantaged communities through its community engagement initiatives. The research was conducted through a revelatory case study of an Irish HEI that is newly constituted and is developing an inner-city campus with a focus on community benefit. Rich qualitative data were collected through semi-structured interviews and participant observation of an HEI community engagement initiative with disadvantaged communities. Thematic analysis methods were used in the processes of generating codes, categories and themes leading to the findings of this study.
Findings
The study identified that broadening the interpretation of entrepreneurial activity to value creation and developing enterprising behaviour has significant relevance for disadvantaged communities. These communities may not have the capacity to start a business yet might benefit from the personal development aspects of entrepreneurial education. Moreover, findings indicate how HEIs are uniquely positioned to develop inclusive entrepreneurial education initiatives to redress social inequalities in their regions.
Originality/value
As an original contribution to knowledge, this paper extends traditional education frameworks to identify individual, collective and system-level considerations in the design and development of inclusive entrepreneurial education initiatives. This study contributes an evidence-based framework to guide HEIs and their regional partners in the future development of inclusive, tailored support through entrepreneurial education.
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Reetika Goyal, Sunita Deswal and Kapil Kumar Kalkal
In the framework of GN-II theory, this paper aims to address the plane wave propagation in a two-dimensional homogeneous, transversely isotropic magneto-thermoelastic medium with…
Abstract
Purpose
In the framework of GN-II theory, this paper aims to address the plane wave propagation in a two-dimensional homogeneous, transversely isotropic magneto-thermoelastic medium with rotation and voids.
Design/methodology/approach
To investigate the problem, the fundamental governing equations are modified in the purview of Green-Naghdi theory without energy dissipation. These equations are converted to non-dimensional form using dimensionless quantities and are further solved to obtain four quasi plane waves travelling with different phase speeds in the considered medium. Amplitude ratios and energy ratios have been provided in explicit form after implementing the proper boundary conditions.
Findings
Numerical calculations are carried out using MATLAB software. For graphical representation of the expressions for phase velocities, reflection coefficients and energy ratios, a particular material is chosen to demonstrate the effects of magnetic field, rotation and void parameter.
Originality/value
The reflection coefficients are strongly affected by rotation, void parameter and magnetic field, as evidenced by conceptual and numerical findings. For validation of this study, the outcomes have also been compared to earlier published studies. In addition, it has also been established that the energy conservation law is also justified during the reflection phenomena. In the current research, the authors have included rotation and magnetic field in a transversely isotropic thermoelastic medium having voids, which has not yet been addressed in the published research. The results of current problem are very useful in a number of fields, such as soil dynamics, geophysical processes, chemical engineering and petroleum sector.
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Sunghyun Sung, Yeonghwan Song, Wonrae Kim, Ohyung Kwon and Kyung-Young Jhang
This study aims to investigate the relationship between melt pool dimensions and acoustic emission (AE) signal magnitudes obtained during laser powder bed fusion (L-PBF) process…
Abstract
Purpose
This study aims to investigate the relationship between melt pool dimensions and acoustic emission (AE) signal magnitudes obtained during laser powder bed fusion (L-PBF) process of austenitic stainless steel. Specifically, by varying laser power and scan speed, the widths, depths and aspect ratios of melt pools were compared with AE signal magnitudes across a frequency range of 100–200 kHz.
Design/methodology/approach
Experiments were conducted under different laser powers at a fixed scan speed and scan speeds at a fixed laser power. Melt pool dimensions were measured from cross-sectional optical images, and AE signals were obtained using a piezoelectric AE sensor installed beneath the build plate. Short-Time Fourier Transform (STFT) was applied to AE signals, and the magnitudes of frequency components were obtained.
Findings
A strong correlation between melt pool dimensions and STFT magnitude was obtained. Pearson correlation coefficients between melt pool dimensions and STFT magnitudes were above 0.9 and the p-values were below 0.05. Increasing the laser energy enlarged the volume of melt pool and intensified the oscillation of melt pool. When scan speed exceeded 1,100 mm/s, STFT magnitude showed a slight increase owing to the increase in the vapor pressure.
Originality/value
Previous studies used AE signals to detect defects, but this study found a correlation between STFT magnitude and melt pool dimensions in L-PBF process. It was also found that STFT magnitude was more affected by vapor pressure at higher scan speeds. Monitoring STFT magnitude can help to understand melt pool dynamics, maintain process consistency and identify irregularities in real time.
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Marcel Utiyama, Dario Henrique Alliprandini, Hillary Pinto Figuerôa, Jonas Ferreira Gondim, Lucas Tollendal Gonçalves, Lorena Braga Navas and Henrique Zeno
The advent of Industry 4.0 (I4.0) and the requirements imposed on companies still need to be clarified. Companies still strive to understand I4.0 requirements and technological…
Abstract
Purpose
The advent of Industry 4.0 (I4.0) and the requirements imposed on companies still need to be clarified. Companies still strive to understand I4.0 requirements and technological, organizational, operational and management challenges. Current literature on I4.0 underlies the importance of a roadmap with structured steps to achieve the benefits of I4.0, mainly focused on augmenting operational performance. Therefore, this paper proposes a roadmap to implement I4.0 focused on operational management concepts, mainly aiming to augment operational performance and bridge the gap between theory and practice regarding roadmaps focused on the operational management dimension.
Design/methodology/approach
This paper follows a research approach divided into the following stages: a literature review to analyze the I4.0 roadmaps and identify the main components of I4.0; development of the proposed I4.0 roadmap presented; field research to test the roadmap by collecting data from a manufacturing company in the automotive industry; validation of the roadmap through modeling and simulation.
Findings
The authors presented a production line design with real-time control, fast response, shop floor coordination and predictive capacity. The results prove that the proposed I4.0 roadmap augments operation performance in the investigated automotive company. The main results were work in process reduction, lead time reduction, output increase, real-time control, shop floor coordination and fast response.
Originality/value
The main novelty of the proposed roadmap is to move toward I4.0 implementation with a focus on the operational management dimension. The roadmap has an innovative combination of the two approaches – lean manufacturing and factory physics – a straightforward roadmap with only three steps: (1) requirements, (2) real-time control and (3) predictive capacity, a structured definition of the approaches and operational management concepts fundamental in each step.