Hasil untuk "Manufactures"

M. Fishman

A. Gunasekaran

Rebecca Duray, Peter T. Ward, G. W. Milligan et al.

H. Klauk

R. Bender1, A. Ziegler2, St Lange3

The objective of this study was to identify the impact of technological development on the growth of the manufacturing sector in the KSA during the period )1995-2022(, and in order to discover the aspects of the relationships between the variables, a Multiple Linear Regression Analysis model was used, and a number of tests to express the relationship between growth in the manufacturing sector as a dependent variable, and the related independent variables, which were selected based on previous studies and the researcher‘s judgments, represented in: spending on technological development, labor force, number of factories, and the value of manufacturing exports. By testing the hypotheses that were identified, the general trend of the variables was identified through the statistical program E-views. As expected, the results showed a direct relationship between the dependent variable and both the value of manufacturing exports and spending on technological development, while the results showed -contrary to what was expected-a direct relationship between the dependent variable and both the labor force and the number of factories. The study recommends a number of recommendations, It is represented in making awareness efforts for small and medium-sized enterprises in the process of selecting the appropriate technological technology in the production process, which enhances the efficiency of the outputs, providing the appropriate environment for investors in the technological field and the industrial field to achieve a competitive advantage over the rest of the industrialized countries, paying attention to manufacturing industries and their exports to reduce dependence on Oil revenues, conducting more studies related to technological development and its impact on the industrial sector in the KSA.

E. Wycisk, A. Solbach, S. Siddique et al.

Abstract Laser Additive Manufacturing (LAM) enables economical production of complex lightweight structures as well as patient individual implants. Due to these possibilities the additive manufacturing technology gains increasing importance in the aircraft and the medical industry. Yet these industries obtain high quality standards and demand predictability of material properties for static and dynamic load cases. However, especially fatigue and crack propagation properties are not sufficiently determined. Therefore this paper presents an analysis and simulation of crack propagation behavior considering Laser Additive Manufacturing specific defects, such as porosity and surface roughness. For the mechanical characterization of laser additive manufactured titanium alloy Ti-6Al-4V, crack propagation rates are experimentally determined and used for an analytical modeling and simulation of fatigue. Using experimental results from HCF tests and simulated data, the fatigue and crack resistance performance is analyzed considering material specific defects and surface roughness. The accumulated results enable the reliable prediction of the defects influence on fatigue life of laser additive manufactured titanium components.

B. Lauwers, F. Klocke, A. Klink et al.

J. Deckers, J. Vleugels, J. Kruth

S. Hu

Abstract This paper reviews the development of the paradigms of manufacturing, including mass production, mass customization and the emerging paradigm of personalization. In each paradigm, we discuss the contributions of scientific principles, manufacturing technologies and systems operations and how they are integrated together to achieve quality, productivity and responsiveness in manufacturing. We also compare the roles of the consumer in each paradigm.

J. Lipton, M. Cutler, Franz Nigl et al.

J. Faludi, C. Bayley, S. Bhogal et al.

Andrea Mina, Elif Bascavusoglu-Moreau, A. Hughes

The concept of open innovation captures the increasing propensity of firms to work across their traditional boundaries of operation. This phenomenon has largely been studied from the viewpoint of manufacturing businesses while services have received much less attention despite the predominant role they play in advanced economies. This paper focuses on open innovation in services, both as a subsector of the economy and as a component of the activities of manufacturing firms. We study the open innovation practices of business services firms and then consider the implications for open innovation of the adoption of a service inclusive business model by manufacturing firms. Our analyses are based on a unique dataset with information on open innovation activities amongst UK firms. Overall, engagement in open innovation increases with firm size and RD they are more engaged in informal relative to formal open innovation practices than manufacturers; and they attach more importance to scientific and technical knowledge than to market knowledge compared to manufacturing firms. Open innovation practices are also associated with the adoption of a service inclusive business model in manufacturing firms and service-integrated manufacturers engage in more informal knowledge-exchange activities. The paper contributes towards a reconceptualisation of open innovation in service businesses and a deeper evidence-based understanding of the service economy.

Ankit Saxena, Christopher Rahn, Guha Manogharan

The ability to fully achieve shape-morphing functionality and tunable mechanical properties is constantly desired to push the current boundaries of robotics, smart structures, aerospace, and defense applications. While shape change has been extensively explored in soft materials, they are often unsuitable for load-bearing structural applications. In this work, a new class of monolithic metamaterials with Pressure-actuated shape-morphing Cells (labelled ‘PASCells’) is demonstrated for shape-morphing functionality in rigid structures. The novelty in the presented PASCells lies in achieving high elastic strains in load-bearing structural members by selectively pressurising fluidic cells that can now be additively manufactured. This new metamaterial functionality can be realised at multiple length scales for a wide range of loading conditions with on-demand shape-morphing and tuning of mechanical responses. The analytical methods and experimental characterisation presented in this paper are foundational to achieving shape-morphing in high-performance structural applications such as airfoils in aerospace and wind turbines.

Rafid Shams Huq, Tyler Heal, Thomas Tannert

Timber framing has traditionally relied on metal fasteners, with have a high carbon footprint and often limited aesthetic appeal. These challenges can be addressed by using traditional joints such as timber housings. However, there are no design guidelines available that account for the joint geometric parameters, mechanical reinforcements, or the wood moisture content during fabrication and when loaded. In this research, the influence of joint geometry, wood moisture and reinforcement on the load-carrying capacity of solid timber beams with housings was investigated. A total of 150 Pseudotsuga menziesii (Douglas fir) beams were tested according standard, considering different moisture condition (wet or dry) at the time of cutting and at the time of testing. The tests confirmed that greater bearing depth and the use of self-tapping screws as reinforcement lead to increased load-carrying capacity. However, moisture condition significant affected only the double housings, not the single housings. In addition, 198 small-scale specimens were tested for shear, tension and compression to evaluate the impact of small clear specimen material strength on the beam load-carrying capacity. The results showed that these properties were weak predictors of housing performance. Finally, a design approach based on existing Canadian code provisions is suggested.

R. Ghazilla, N. Sakundarini, S. H. Abdul-Rashid et al.

Abstract Nowadays, the manufacturing industry is faced with the challenge to adhere to stringent environmental regulations due to the scarcity of natural resources, global warming and waste management issues. Increasing environmental concerns and awareness are the driving force which pushes manufacturers all over the world to adopt green manufacturing practices. However, the drivers and barriers of implementing green manufacturing practices in Small and Medium Enterprises (SMEs) differ from those for large enterprises since SMEs lack the data, resources, technical expertise and experience required to implement green initiatives. The environmental performance of SMEs is mostly driven by the intention of company owners. Since SMEs play a crucial role in a nation's economic growth, it is imperative to identify the drivers and barriers which will motivate and hinder the implementation of green manufacturing practices in SMEs, which forms the main motivation of our work. In this paper, we report preliminary findings on the drivers and barriers faced by SMEs in implementing green manufacturing practices, specifically in Malaysia. We use the Delphi survey method to explore, identify and verify the drivers and barriers of green manufacturing practices by obtaining consensus from a panel of experts. The experts are required to answer questionnaires in three rounds. The results of this study will offer insight to SMEs who intend to transform their manufacturing practices from conventional to green ones. We believe that our study will assist the manufacturing industry in prioritizing the key factors which will influence the adoption of green manufacturing practices.

J. Watson, K. Taminger

G. Adamson, Lihui Wang, M. Holm et al.

Xifan Yao, Jiajun Zhou, Ying-chieh Lin et al.

Zhonghua Cheng

F. H. Abanda, J. Tah, F. Cheung

Abstract The need to overcome challenges faced by construction industry has been at the core of many government reports. Most of the reports suggest the adoption of innovations including off-site manufacture and emerging Building Information Modelling (BIM) to overcome the challenges facing the industry. Current research has largely focused on the impacts of off-site manufacture and BIM independently applied on traditional construction methods. Due to the factory-based nature of off-site manufacture, the benefits of BIM on off-site manufacture have been widely argued to be far greater than those of traditional construction. However, studies about impacts of BIM on off-site manufacture are scarce with far too many on traditional construction. This study investigates the implications of BIM systems on off-site manufacture and traditional construction methods, with emphasis on the technological potential of BIM for off-site manufacture. The specific objectives of the study are threefold. Firstly, it examines how BIM can support off-site manufacture. Secondly, the paper discusses the benefits of BIM and explains how BIM can overcome barriers hindering the uptake of off-site manufacturing. Thirdly, due to the importance to measure the benefits to support wider adoption, an examination of the published quantitative benefits of BIM on off-site manufacture and traditional construction is undertaken. A critical appraisal of the literature was undertaken to achieve the aim of this study. The main findings are the identification of qualitative and quantitative benefits of: BIM on off-site manufacture, off-site manufacture and BIM on traditional construction. The findings reinforce the argument that BIM adoption on off-site manufacturing projects is a rapid, efficient and one of the best ways to improve on the long standing challenges that have plagued the construction industry for generations.