This study aims to examine the impact of specific printing factors, such as layer height, line width and build orientation, on the overall quality of fused filament fabrication…
Abstract
Purpose
This study aims to examine the impact of specific printing factors, such as layer height, line width and build orientation, on the overall quality of fused filament fabrication (FFF) 3D printed structures. The project also intends to use response surface methodology (RSM) to maximize ultimate tensile strength (UTS) while lowering surface roughness and printing time.
Design/methodology/approach
This study used an FFF printer to fabricate samples of polylactic acid (PLA), which were then subjected to assessments of tensile strength and surface roughness. A tensile test was conducted under standardized conditions according to the ASTM D638 standard test method using the AG-50 kN Shimadzu Autograph. The Mitutoyo Surftest SJ-210, which utilizes a needle-tipped inductive method, was used to determine surface roughness. RSM was used for optimization.
Findings
This work provides useful insights into how the printing parameters affect FFF 3D printed structures, which may be used to optimize the printing process and improve PLA-based 3D printed products' qualities. The determined optimal values for building orientation, layer height and line width were 0°, 0.1 mm and 0.6 mm, respectively. The total desirability value of 0.80 implies desirable outcomes, and good agreement between experimental and projected response values supports the suggested models.
Originality/value
Previous RSM studies for 3D printing parameter optimization focused on mechanical properties or surface aspects, however, few examined multiple responses and their interactions. This study emphasizes the relevance of FFF parameters like line width, which are often overlooked but can dramatically impact printing quality. Mechanical properties, surface quality and printing time are integrated to comprehend optimization holistically.
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Mehmet Kivanc Turan, Muhammet Üsame Sabirli, Altug Bakirci, Emirhan Kartal and Fatih Karpat
This study aims to investigate the effects of five different printing parameters, namely, printing speed (PS), printing temperature/nozzle temperature/extrusion temperature…
Abstract
Purpose
This study aims to investigate the effects of five different printing parameters, namely, printing speed (PS), printing temperature/nozzle temperature/extrusion temperature, heated-bed temperature, raster angle (RA) and layer height (LT), on mechanical properties.
Design/methodology/approach
American Society for Testing and Materials (ASTM) standards were used for the specimen design. Then, the Taguchi method was used for the design of the experiment and an L16 orthogonal array was preferred. Tensile, Shore D and surface roughness tests were conducted on polylactic acid test specimens. The test results were analyzed using the signal-to-noise ratio and analysis of variance (ANOVA).
Findings
As a result of the study, it was seen that RA is the most important parameter for the tensile strength, PS is for the hardness and LT is for the surface roughness. According to the ANOVA results, the effects of the RA, PS and LT on the maximum tensile strength, hardness and surface roughness were 41.59%, 69.51% and 44.6%, respectively.
Originality/value
To the best of the authors’ knowledge, this study is one of the most comprehensive parameter optimization studies for additive manufacturing in the literature because it includes five different printing parameters and three mechanical test procedures.
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This study aims to investigate how printing parameters affect the mechanical properties of specimens produced through fused filament fabrication, using the Erichsen test to assess…
Abstract
Purpose
This study aims to investigate how printing parameters affect the mechanical properties of specimens produced through fused filament fabrication, using the Erichsen test to assess deformation characteristics and material durability under stress.
Design/methodology/approach
Polylactic acid (PLA) specimens were printed and tested in accordance with the ISO 20482 standard. Definitive screening was conducted to identify the most influential process parameters. This study examined the effects of four key process parameters – number of layers, layer height, crossing angle and nozzle diameter – on force, distension, peak energy and energy to break. Each parameter was assessed at three levels and a large number of required experiments was managed by using response surface methodology (RSM).
Findings
This study revealed that the number of layers, layer height and crossing angle are the most significant factors that influence the mechanical properties of 3D-printed materials. The number of layers had the greatest impact on the peak force, contributing 44.25%, with thicker layers typically enhancing material strength. The layer height has a significant effect on energy absorption and deformation, with greater layer heights generally improving these properties. Nozzle diameter contributed only 1.10%, making it the least influential factor; however, its impact became more pronounced in interactions with other parameters.
Originality/value
This paper presents a comprehensive experimental investigation into the effects of process parameters on the crack strength and behavior of 3D-printed PLA specimens using the RSM method. The documented results can be used to develop optimization models aimed at achieving desired mechanical properties with reduced variation and uncertainty in the final product.
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Ashok Sapkota, Shree Kaji Ghimire and Sabit Adanur
Optimization of FDM process parameters has emerged as a major step toward mitigating the issue of reduced mechanical strength of fused deposition modeling (FDM) products. This…
Abstract
Purpose
Optimization of FDM process parameters has emerged as a major step toward mitigating the issue of reduced mechanical strength of fused deposition modeling (FDM) products. This study aims to evaluate the impact of process parameters on the mechanical properties of 3D-printed fabric yarns of three different materials, namely, polyethylene terephthalate glycol (PETG), nylon and thermoplastic polyurethane (TPU).
Design/methodology/approach
2/1 Twill fabric samples with variations of extrusion temperatures and printing profiles are produced, and the individual yarns, manually separated from the fabric samples, are tested for tensile strength, modulus, strain and energy at maximum force. The tensile test results are further subjected to statistical analysis with MINITAB software to detect the standard level of influence of each parameter and evaluate their significance.
Findings
Both extrusion temperature and printing profile, along with their interaction, are significantly important parameters for the mechanical behavior of PETG. However, for nylon and TPU, the influence of a few parameters is found to be insignificant. For all variations of fabric yarns, relatively lower extrusion temperature is concluded to be preferable for better mechanical properties.
Originality/value
This research is new and original. It provides knowledge about how FDM process parameters influence the mechanical behavior of fabrics. It also identifies the optimum process parameters for the best performance of the final product. This article can be a foundation for further parametric analysis of 3D-printed fabric. No artificial intelligence or similar software was used in the preparation of this manuscript.
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Adhesive bonding is critical to the effectiveness and structural integrity of 3D printed components. The purpose of this study is to investigate the effect of joint configuration…
Abstract
Purpose
Adhesive bonding is critical to the effectiveness and structural integrity of 3D printed components. The purpose of this study is to investigate the effect of joint configuration on failure loads to improve the design and performance of single lap joints (SLJs) in 3D printed parts.
Design/methodology/approach
In this study, adherends were fabricated using material extrusion 3D printing technology with polyethylene terephthalate glycol (PETG). A toughened methacrylate adhesive was chosen to bond the SLJs after adherend printing. In this study, response surface methodology (RSM) was used to examine the effect of the independent variables of failure load, manufacturing time and mass on the dependent variable of joint configuration; adherend thickness (3.2, 4.0, 4.8, 5.6, 6.4, and 7.2 mm) and overlap lengths (12.7, 25.4, 38.1, and 50.8 mm) of 3D printed PETG SLJs.
Findings
The strength of the joints improved significantly with the increase in overlap length and adherend thickness, although the relationship was not linear. The maximum failure load occurred with a thickness of 7.2 mm and an overlap of 50.8 mm, whilst the minimum failure load was determined with a thickness of 3.2 mm and an overlap of 12.7 mm. The RSM findings show that the optimum failure load was achieved with an adherend thickness of 3.6 mm and an overlap length of 37.9 mm for SLJ.
Originality/value
This study provides insight into the optimum failure load for 3D printed SLJs, reducing SLJ production time and mass, producing lightweight structures due to the nature of 3D printing, and increasing the use of these parts in load-bearing applications.
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Yannian Wu, Euisoo Kim, James J. Zhang, Fengyan Li and Haixia Duan
Grounded in social cognitive theory, social exchange theory and “cognition-emotion-behavior intention” analysis framework, a theoretical model of cause-related sport marketing…
Abstract
Purpose
Grounded in social cognitive theory, social exchange theory and “cognition-emotion-behavior intention” analysis framework, a theoretical model of cause-related sport marketing (CRSM) affecting consumers’ purchase intentions was constructed through a case study. This model was then empirically validated to confirm CRSM's impact on consumers' purchase intentions.
Design/methodology/approach
This study embraces a mixed-methods approach that combines both qualitative and quantitative research methodologies to investigate the mechanisms through which CRSM influences consumers' purchase intentions.
Findings
The results indicate that: (1) consumers’ perception of CRSM has no direct impact on purchase intentions; (2) consumers’ perception of CRSM directly affects gratitude; (3) consumer gratitude acts as a complete mediator between perceived CRSM and purchase intentions.
Originality/value
These findings shed light on the role of gratitude in CRSM and offer practical guidance for sports enterprises in improving their philanthropic marketing strategies.
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After the financial crisis of 2007–2008, the financial service industry realized that the world’s worst financial catastrophe had been caused by an age of easy money and lax…
Abstract
After the financial crisis of 2007–2008, the financial service industry realized that the world’s worst financial catastrophe had been caused by an age of easy money and lax monitoring. This realization led to pressure on regulators to overhaul the financial system during the Great Depression. Banks were required to make sure they implemented a variety of endogenous risk-minimization mechanisms and assume accountability for verifying the stability of the financial scheme. Innovative financial technology (FinTech) solutions arose in this more regulated environment to address – or, as one would argue, avoid – risks that arose during the financial crisis. The goal of this chapter is to examine the possible challenges and opportunities of incorporating FinTech into Islamic finance. Four services are provided by Islamic FinTech: finance, payments, advisory, and compliance. The traditional financial system is being recolonized by Islamic FinTech. FinTech adoption in Islamic finance could lead to greater financial inclusion, the solution to emergencies like COVID-19, and the achievement of Sustainable Development Goals (SDGs) for a sustainable national economy. However, there could be obstacles associated with this acceptance in the form of risk, investment, and regulatory issues. In order for FinTech companies to be innovative and address social issues that conventional financial institutions fail to address, authorities must provide a market whereby these companies can thrive without having to be acquired by major banks or focus their innovation solely on meeting the demands of these banks. Furthermore, they need to be explicit about the regulations' applicability to FinTech companies, especially with regard to how to strike a balance between being a technology company and a financial institution.
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Chandra Shekhar Pandey and Shri Ram Pandey
This study investigates the intricate dynamics of the hidden curriculum and its influence on student achievement in teacher education programs. Specifically, the study examines…
Abstract
Purpose
This study investigates the intricate dynamics of the hidden curriculum and its influence on student achievement in teacher education programs. Specifically, the study examines the mediating role of professional and constitutional values and the moderating role of sex in this relationship.
Design/methodology/approach
A total of 282 bachelor of education fourth semester students (151 female and 131 male) participated in the study. General linear modeling in Jamovi 2.4.4 was utilized to analyze the data. The general linear model (GLM) mediation model was used to measure the mediation effects of the hidden curriculum via professional value and constitutional value on student achievement. Sex was accepted as a dichotomous moderator in the model.
Findings
Hidden curriculum had positive significant direct and total effect on student achievement. The mediation of constitutional values between hidden curriculum and student achievement was found to be significant and negative. Professional value was not found to be a significant mediator. The interaction between sex and constitutional value was significant and positive. Apart from this sex moderated professional and constitutional values differentially. Constitutional and professional values had significant direct component effects on student achievement. The findings contribute to the discourse of hidden curriculum by providing insights into the interplay of sex, professional values, constitutional values and student achievement.
Practical implications
The study has implications for educational policies and curriculum design, urging stakeholders to pay attention to the implicit messages communicated by the curriculum. Professional and constitutional values influence the hidden curriculum and achievement. Therefore, teachers should be equipped with an understanding of these values to manage the hidden curriculum in their classrooms. The study also highlights the gendered educational experiences and the necessity of implementing gender-sensitive policies and practices in schools and classrooms.
Originality/value
This study provides unique insights into the complex relationship between the hidden curriculum and student achievement in the context of a teacher education program in India. The findings highlight the importance of addressing the hidden curriculum in educational settings and emphasize the need for gender-sensitive policies and practices.
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Sibel Ejder Tekgündüz, Ayşe Gürol and Serap Ejder Apay
This study aims to understand how midwifery students view ethical rights concerning the usage of reproductive technologies.
Abstract
Purpose
This study aims to understand how midwifery students view ethical rights concerning the usage of reproductive technologies.
Design/methodology/approach
A series of focus groups were conducted with midwifery students who were asked to discuss four novel scenarios highlighting some of the most controversial issues on the ethics of assisted reproductive technologies. The sample consisted of third-year students studying at the Department of Midwifery of a university in the fall semester of the 2020–2021 academic year. In total, 60 students aged between 20 and 23 participated in the study (mean age 21.5 years).
Findings
Four scenarios that may be encountered in the use of assisted reproductive techniques were presented to the students. These scenarios were about IVF treatment, using the preimplantation gender identification technique, surrogate mother and using frozen zygotes. Four themes were identified from the analysis of the focus group data related to all four scenarios. These themes were: female reproduction, sex selection, surrogacy and reproductive cloning.
Originality/value
This study reveals what midwifery students consider essential components of assisted reproduction techniques, focusing on the professional attributes of shared decision-making. The results suggest that student midwives are sensitive to the range of ethical dilemmas associated with the increased use of technology in human reproduction, and construct distinct bound arise in relation to what is considered of benefit or good to the mother, parents, the child and to society. They also expressed their opposition to the excessive use of technological intervention, preferring instead to maintain a more naturalistic approach to reproduction.
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Zijun Lin, Chaoqun Ma, Olaf Weber and Yi-Shuai Ren
The purpose of this study is to map the intellectual structure of sustainable finance and accounting (SFA) literature by identifying the influential aspects, main research streams…
Abstract
Purpose
The purpose of this study is to map the intellectual structure of sustainable finance and accounting (SFA) literature by identifying the influential aspects, main research streams and future research directions in SFA.
Design/methodology/approach
The results are obtained using bibliometric citation analysis and content analysis to conduct a bibliometric review of the intersection of sustainable finance and sustainable accounting using a sample of 795 articles published between 1991 and November 2023.
Findings
The most influential factors in the SFA literature are identified, highlighting three primary areas of research: corporate social responsibility and environmental disclosure; financial and economic performance; and regulations and standards.
Practical implications
SFA has experienced rapid development in recent years. The results identify the current research domain, guide potential future research directions, serve as a reference for SFA and provide inspiration to policymakers.
Social implications
SFA typically encompasses sustainable corporate business practices and investments. This study contributes to broader social impacts by promoting improved corporate practices and sustainability.
Originality/value
This study expands on previous research on SFA. The authors identify significant aspects of the SFA literature, such as the most studied nations, leading journals, authors and trending publications. In addition, the authors provide an overview of the three major streams of the SFA literature and propose various potential future research directions, inspiring both academic research and policymaking.