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Effect of annealing on FDM-manufactured ABS parts

International Journal of Advanced Manufacturing Technology 2025年第5期138卷 2233-2243页

作者： Hussam, Heba Soliman, MEmad S. Hassab-Allah, Ibrahim M. Abdelrhman, Yasser Department of Design and Production Engineering Assiut University Assiut71515 Egypt Mechanical and Industrial Engineering Department College of Engineering Majmaah University Al Majmaah11952 Saudi Arabia

This study addresses the impact of loaded annealing in contrast to typical annealing on the tensile strength, ductility, and dimensional stability of fused deposition modeling (FDM)-produced parts. In loaded annealing, specimens are annealed while being pressed via additional weight. Acrylonitrile butadiene styrene (ABS) FDM test samples have undergone typical and loaded annealing both at three different annealing temperatures. Results show that treatment of the amorphous ABS material at temperatures less than the glass transition point increases tensile strength by 7.6%, whereas annealing it at higher temperatures improves ductility by 9.7% and 17.56%. Scanning electron microscope (SEM) images reveal that the increase of annealing temperature improves cohesion between specimen roads and layers. Moreover, dimensional changes in specimen thickness are reduced by 86% due to the usage of a newly introduced annealing mold. It could be concluded that the technique of loaded annealing introduces exceptional enhancement to the mechanical properties of FDM parts. © The Author(s) 2025.

关键词： Tensile strength

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Using parallel metaheuristics to solve a parallel U-shaped robotic mixed-model assembly line balancing and sequencing problem: Using parallel metaheuristics to solve a parallel U-shaped robotic mixed-model…: Azadeh Farsi et al.

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Soft Computing 2024年第21期28卷 12603-12621页

作者： Farsi, Azadeh Mokhtarzadeh, Mahdi Rabbani, Masoud Manavizadeh, Neda Ghasempour Anaraki, Matin Department of Systems and Industrial Engineering University of Arizona TucsonAZ United States Department of Industrial Systems Engineering and Product Design Ghent University Ghent Belgium School of Industrial Engineering College of Engineering University of Tehran Tehran Iran Department of Industrial Engineering KHATAM Institute of Higher Education Tehran Iran

Automation has become a major part of assembly lines because of the rapid technological advancement by industry 4.0. Two major assembly line branches are mixed-model assembly line sequencing and robotic assembly line balancing, which deal with the continuous production of various versions of a product and the use of robots to increase assembly line production rates and efficiency. This study examines the sequencing and balancing of an integrated mixed-model robotic U-shaped assembly line in order to improve assembly line productivity. Regarding the limited energy resources and increased price of energy, minimization of robots’ energy consumption is considered as an objective function. Besides that, makespan and tardiness minimization are considered as two other objective functions. The problem is solved by a parallel multi-objective dragonfly algorithm and non-dominated sorting genetic algorithm II, which utilizes the strengths and covers the weaknesses of the two algorithms. Computational results indicated the superiority of the proposed algorithm against multi-objective dragonfly algorithm, non-dominated sorting genetic algorithm II, and multi-objective particle swarm optimization. An experimental comparison between the parallel U-shaped layout and non-U-shaped parallel and U-shaped non-parallel layouts shows that the proposed layout increases the efficiency of assembly line and reduces robots idle time and energy consumption. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Robotic assembly

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Nanotechnology: The Challenge in Innovative Architectural design Using Nanomaterials 14th

Nanotechnology: The Challenge in Innovative Architectural De...

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14th International scientific conference on Modern Building Materials, Structures and Techniques, MBMST 2023

作者： Cheirchanteri, Georgia Department of Industrial Design and Production Engineering University of West Attica Egaleo Athens Greece

ISBN: (纸本)9783031446023

Materials, as both structure and expression elements, have always been affecting architectural design. However, over the years, the use of advanced technology has provided a wide range of possibilities in implementing architectural design. In the latter part of the 20th century, especially in Nanotechnology, scientific and technological advancements encouraged new approaches for architecture. Meanwhile, Nanotechnology, as a new innovative technology field, provides new, and revolutionary materials that can drastically affect design and performance of buildings. In the present study, the advantages of nanotechnology materials in building construction, which give new properties to structural forms and their load-bearing capacity, making them "smart buildings", are explored. Also, this research tends to build a knowledge framework that includes nanomaterials, their types and characteristics providing means and ways responding to any kind of mission and realization of ideas and forms, in the field of architectural creation. In addition, the aim of this paper, is to introduce the use of nanotechnology materials in architecture, which can satisfy the requirements of today’s building users, including the life cycle of the building, its overall cost, energy independence and efficiency, as well as its sustainability. The combination of innovative capabilities is presented through examples of Nanotechnology materials real application in the construction field, such as the flexibility and dynamics of forms and aesthetics, the protection of the quality of living conditions and the control of microclimate, functions that are now feasible. © The Author(s), under exclusive license to Springer Nature Switzerland AG. 2024.

关键词： Nanostructured materials

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Vision-language model-based human-robot collaboration for smart manufacturing:A state-of-the-art survey

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Frontiers of engineering Management 2025年第1期12卷 177-200页

作者： Junming FAN Yue YIN Tian WANG Wenhang DONG Pai ZHENG Lihui WANG Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China Department of Production Engineering KTH Royal Institute of TechnologyStockholmSweden

human-robot collaboration(HRC)is set to transform the manufacturing paradigm by leveraging the strengths of human flexibility and robot *** recent breakthrough of Large Language Models(LLMs)and Vision-Language Models(VLMs)has motivated the preliminary explorations and adoptions of these models in the smart manufacturing ***,despite the considerable amount of effort,existing research mainly focused on individual components without a comprehensive perspective to address the full potential of VLMs,especially for HRC in smart manufacturing *** fill the gap,this work offers a systematic review of the latest advance-ments and applications of VLMs in HRC for smart manu-facturing,which covers the fundamental architectures and pretraining methodologies of LLMs and VLMs,their applications in robotic task planning,navigation,and manipulation,and role in enhancing human-robot skill transfer through multimodal data ***,the paper discusses current limitations and future research directions in VLM-based HRC,highlighting the trend in fully realizing the potential of these technologies for smart manufacturing.

关键词： vision-language models large language models human-robot collaboration smart manufacturing

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Multivariate modelling of AA6082-T6 drilling performance using RSM, ANN and response optimization

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International Journal of Lightweight Materials and Manufacture 2024年第4期7卷 531-545页

作者： Tzotzis, Anastasios Antoniadis, Aristomenis Kyratsis, Panagiotis Department of Product and Systems Design Engineering University of Western Macedonia Kila Kozani50100 Greece Department of Production Engineering and Management Technical University of Crete Kounoupidiana Chania73100 Greece

The AA6082-T6 was experimentally studied in the present research with respect to the drilling performance. Drill diameter, cutting speed and feed rate were examined, using a full factorial design. Mathematical modelling of the process was carried out using the Response Surface Methodology (RSM) as well as the Artificial Neural Network (ANN) techniques. The output results in terms of cutting force, torque and surface roughness, revealed high levels of correlation between the experimental and the predicted data. Specifically, the Mean Absolute Percentage Error (MAPE) values using RSM compared to the ones of the experiments, were equal to 2.14%, 3.49% and 6.16% for Fz, Mz and Ra respectively. The equivalent MAPE between the ANN and the experiments were found to be 2.19%, 1.82% and 2.85% accordingly. Moreover, the most significant terms were revealed, being the interaction D × f for the thrust force and the torque with contribution percentages equal to approximately 44% and 42% respectively, and the term D2 for the surface roughness with 51%. The evaluation of the machining parameters, identified their significance, enabling the selection of the optimal cutting parameters, which were obtained by the desirability function, taking into account the importance of the generated surface quality and the reduction of cost. The solutions given by this approach, pointed out the Ø9 tool, coupled with Vc = 50 m/min and f = 0.15mm/rev as a well-balanced combination, whereas the Ø9.9 tool used under the same conditions, yielded the best possible surface quality (appr. 0.2 μm). © 2024 The Authors

关键词： Neural networks

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Development of critical reflexive skills among pre-service language teachers in Greek higher education: weaknesses and challenges

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SN Social Sciences 2024年第6期4卷 1-16页

作者： Oikonomakou, Marianthi Papakitsos, Evangelos C. Department of Primary Education University of the Aegean Rhodes Greece Department of Industrial Design and Production Engineering University of West Attica Egaleo Greece

The main point of this qualitative research is the development of students’ critical reflexive skills in Greek tertiary education, through the study of the effectiveness of different models of organizing practicums, the supervisory relationships that teachers develop in their collaboration, as well as the role of both local and broader socio-cultural context in shaping critically-thinking education professionals. The field of research, which data are extracted from, is primarily the area of initial education of teachers and especially of trainee students of the Pedagogical departments, but also that of teachers in service at the host schools. With the help of different methodological tools, the aim is to critically highlight issues related to teaching adequacy and readiness, but also to the challenges of language teaching in modern socio-cultural environments, under the burden of the economic crisis and of the health one, recently. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

关键词： Critical literacy Initial teacher education Language teaching Practicum Pre-service teachers

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Machining process parameters optimization using soft computing technique

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Journal of engineering and Applied Science 2023年第1期70卷 7页

作者： El Hossainy, Tarek M. Zeyada, Yasser Abdelkawy, Abdallah Mechanical Design and Production Department Faculty of Engineering Cairo University Giza12613 Egypt Industrial Systems Engineering Department Faculty of Engineering MSA University 6th of October City Egypt Projects and Services Europe & Africa Schneider Electric Cairo Egypt

This work introduces an approach for optimization machinability measures of power consumption, machining time, and the surface roughness (PMS). This approach is starting with market customer’s demands, passing by optimizing the machinability measures (PMS), and ending by the optimized cutting conditions. The fuzzy logic was used to define the weights of each of required machinability measurement using method through expert rules depending on factory requirements. Genetic algorithm was formulated for giving optimum output values based on the customer’s demands. A neural network was designed for controlling the input cutting conditions with the PMS output parameters. The proposed soft computing technique creates reasonable results compared to experimental results and gives rich investigations for optimizing the output parameters not only for increasing productivity and quality demands but also for saving power consumed. The variation of consumed power, machining time, and surface roughness was calculated based on different customer demand levels. When the machining time and power consumed importance increased, the proposed technique reduced them by about 20% and 10% for the testes case. © 2023, The Author(s).

关键词： Surface roughness

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What-if considerations in digital twinning;An autorarchic approach 34

What-if considerations in digital twinning;An autorarchic ap...

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34th CIRP design Conference, CIRP 2024

作者： Pronk, Lucas Damgrave, Roy Lutters, Eric Department of Design Production and Management University of Twente Enschede Netherlands Department of Industrial Engineering Stellenbosch University Stellenbosch South Africa

In current practice, digital twins are often created with a set of perspectives in mind. This makes it difficult to separate the content of its structure, which results in less tailored use of the digital twin. Next to that, it becomes hard to utilise the information supplied by the digital twin as different users have different perspectives, and therefore expect and need different information to make decisions. Digital twins can be seen as recursive, which means that a digital twin consists of multiple digital twins with different granularity and functionality. The modularity of digital twins creates a hierarchy between these digital twins. In current practice, this implies that digital twins may encompass and thus prevail over others. This article proposes an autorarchic approach to digital twinning, which can be used to make informed decisions and determine the impact of modules based on their dependence of and relation to other modules. Additionally, this approach allows for the creation of tailored digital twin hierarchies (autorarchies) for specific users, thus creating instantiated and controlled digital twins. © 2024 The Authors. Published by Elsevier B.V.

关键词： Digital twin

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The effect of disparities between real and simulated worlds on decision-making 57

The effect of disparities between real and simulated worlds ...

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18th IFAC Workshop on Time Delay systems, TDS 2024

作者： Pronk, Lucas Altnji, Sam Damgrave, Roy Lutters, Eric Department of Design Production and Management University of Twente Enschede Netherlands Department of Industrial Engineering Stellenbosch University Stellenbosch South Africa

High accuracy in information provisioning systems is often strived for by manufacturing industry, without necessarily yielding commensurate improvements in the decision-making process. This paper explores disparities between real-world measurements and digital simulations based on a case study with soft grippers. In this research, it is demonstrated that establishing a better understanding of parameter sensitivity and highlighting the accuracy required for decisions is more relevant to the decision-making process than aiming for achievable accuracy. Consequently, this approach of seeking required accuracy requires less investments and will lead to more efficient and effective decision-making in manufacturing environments. © 2024 The Authors.

关键词： Digital elevation model

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Impacts of work-family role conflict on job and life satisfaction: a comparative study among doctors, engineers and university teachers

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PSU Research Review 2024年第1期8卷 248-271页

作者： Jahan Priyanka, Tazrin Akter Mily, Momotaj Asadujjaman, Md. Arani, Mohammad Billal, Md. Mashum Department of Industrial and Production Engineering Rajshahi University of Engineering and Technology Rajshahi Bangladesh Department of Systems Engineering University of Arkansas at Little Rock Little Rock AR United States

Purpose: This study was designed to investigate the impacts of work-family role conflict on job and life satisfaction among three major professionals: doctors, engineers and university teachers. Data were collected through a face to face survey on 60 doctors, 60 engineers and 60 university teachers of different public and private institutes of Bangladesh. design/methodology/approach: Conducted data analysis were statistical analysis of questionnaires (mean, SD, max, min), descriptive analysis (%), t-test, analysis of variance test, correlation analysis and regression analysis. Findings: The results demonstrate that the university teachers had experienced more work-family conflict (WFC) on job satisfaction and family-work conflict (FWC) on job and life satisfaction than doctors and engineers;however, engineers experienced more WFC in the case of life satisfaction. The study also implied that control variables such as gender identification, reported number of children, marital status, education level and adhered religion had significant impact (p < 0.05) on WFC, FWC, job satisfaction and life satisfaction. Originality/value: This study will provide insight into the effects of spouse, supervisor and number of children on both job and life satisfaction. © 2022, Tazrin Jahan Priyanka, Momotaj Akter Mily, Md. Asadujjaman, Mohammad Arani and Md. Mashum Billal.

关键词： Bangladesh Family-work conflict (FWC) Job satisfaction (JS) Quantitative analysis Work-family conflict (WFC)

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