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  • 301. Thompson, Anthony
    et al.
    Ny, Henrik
    Lindahl, Pia
    Broman, Göran
    Severinsson, Mikael
    Benefits of a Product Service System Approach for Long-life Products: The Case of Light Tubes2010Conference paper (Refereed)
    Abstract [en]

    Products designed for long-life often have significant potential for better sustainability performance than standard products due to less material and energy usage for a given service provided, which usually also results in a lower total cost. These benefits are not always obvious or appealing to customers, who often focus on price. Long-life products are therefore at an inherent disadvantage: due to lower volume of sales that results from the products’ longer-life, the margins (price) often need to be higher. In this paper, we demonstrate that when the revenue base is shifted to be the service of light (instead of the sales of light tubes), there is an opportunity for a “win-win-win” for the light user, the long-life light provider and society. Through a product-service system approach, resulting in a well-communicated total offer, the full array of benefits becomes clearer to the customer, including that they avoid the high initial cost.

  • 302.
    Tobias, Larsson
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Massimo, Panarotto
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Ola, Isaksson
    Andreas, Larsson
    Value simulation in conceptual phases of PSS design2012Conference paper (Refereed)
    Abstract [en]

    This paper discuss the change in early design imposed by a Product-Service Systems (PSS) perspective onto the design and development phases of engineering design and how this affects the today de-facto standard of virtual modelling of product properties. The approach is exemplified via PSS situations related to aerospace and automotive industry in order to clarify “parameters of change” due to PSS reasoning, and challenges are displayed regarding early modelling and simulation.

  • 303.
    Tonnie, Aruoture Onome
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    A Reference Searching Related To Nanomaterials,Food Packaging and Sustainability2007Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    This report focuses on the study of nanomaterials as a packaging material for the food industries. Reviews were carried out and the various properties exhibited by various nanomaterial used in the packaging industry were looked into. An investigation was also done on carbon nanotubes which are used to a large extent as reinforcing materials in the development of new class of nanocomposites. This report also traces the cause of sustainability problems associated with the use of nanomaterials in the food packaging industry. It analyzes and extrapolates the prospect of additional capabilities that human may gain from the development of nanomaterial in the food industry in order to ascertain environmental sustainability.

  • 304. Tretten, Phillip
    et al.
    Gärling, Anita
    Nilsson, Rickard
    Larsson, Tobias
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    An on-road study of head-up display: Preferred location and acceptance levels2011Conference paper (Refereed)
    Abstract [en]

    The purpose of this study was to gain a better understanding of driver's perceptions of Head-Up Displays (HUD). Many HUD studies have been conducted but few have allowed drivers to test a HUD in their own vehicle, allowing them to choose the best HUD location for themselves. Forty participants drove their own vehicles using a portable HUD device, testing different HUD locations, and then rated the HUD using the Technology Acceptance Model. The results showed that the HUD was rated as easy to use and the drivers intended to use it in continuation. The drivers wanted the HUD to be located outside of the traffic scene, below their line of sight. These results give support for new HUD locations and for increased HUD implementation.

  • 305.
    Turi, Ejaz Yousaf
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Output only Modal Analysis2007Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    The thesis work aims at estimating the modal parameters of a system using a technique amongst different proposed in Output only Modal Analysis.

  • 306.
    Turner, Carmen
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Kasnet, Archie
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    How can a destination resort development company be strategic in sustainable development?2005Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Although sustainable development is becoming a strategic priority for some organizations, many do not apply it as a business strategy like traditional objectives. Sustainability requires a calculated and streamlined approach, specifically, a clear vision of success and a comprehensive plan to achieve success. Intrawest Corporation is currently looking at integrating sustainable development into their practices in both their real estate and resort divisions. Whistler Blackcomb, implemented several environmental and community-based initiatives but has yet to take a company-wide approach to sustainable development. In this study, Whistler Blackcomb and Intrawest’s sustainability initiatives were evaluated based on a scientific definition of sustainability. The paper explores how a resort destination company can strategically integrate sustainability into their business operations. The objective is to highlight Whistler Blackcomb and Intrawest as case studies to understand how a company can gauge their awareness, identify challenges and opportunities, and move towards being a more environmentally excellent, socially just and economically viable company.

  • 307.
    Tyler, Kirk
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Bibri, Mohamed
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Tyler, Norman
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Strategic Sustainable Development and Knowledge Management2007Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    The purpose of this study was to explore how organizations can apply the Strategic Sustainable Development (SSD) Framework (Robèrt et al. 2006) as a lens and filter to a Knowledge Management Framework to move an organization towards sustainability. A conceptual framework of Knowledge Management (KM) was developed and then utilized to conduct a sustainability assessment on The Natural Step (TNS) organization as a case study. The researchers explored how an understanding of KM can support SSD and aid an organization in leveraging their existing knowledge. To achieve the objective, the most commonly accepted KM frameworks were summarized through a literature review. Then the researchers’ understanding of a conceptual KM Framework was developed. The SSD lens was used to identify gaps within the KM frameworks when an organization’s ultimate goal of success is sustainability. The conceptual KM Framework viewed through the SSD lens was utilized in conducting a sustainability assessment on TNS as a case study. The authors attempted to illustrate how using SSD as a lens could assist any organization, not just NGO’s with a sustainability mandate, to enhance any Quality Management System, such as KM, to tackle global issues. The scope of the analysis was focused on understanding the role of KM as it relates to an organization’s journey towards sustainability. Specifically a strengths and weaknesses assessment was conducted. The assessment was used to identify gaps and successes in the following areas: knowledge sharing, sharing methodology and sustainable practices.

  • 308. Wall, Johan
    Simulation-Driven Design of Complex Mechanical and Mechatronic Systems2007Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Effective and efficient product development is critical to business success on the increasingly competitive global market, and simulation has proven to support this in many sectors. The aim of this thesis is to study how properties of complex mechanical and mechatronic systems can be more efficiently and systematically predicted, described, assessed and improved in product development. The purpose is to elaborate an approach that can, rather than only verifying solutions that are already decided upon, support dialogues with customers, stimulate creation of new concepts and provide guidance towards more optimised designs, especially in early development stages. This is here termed simulation-driven design. To be useful for this, product models and simulation and optimisation procedures must be efficient, that is, they must accurately answer posed questions and point towards better solutions while consuming an acceptable amount of time and other resources. In this thesis a coordinated approach to create such efficient decision support is elaborated. This is done by action research through two industrial case studies; an automobile exhaust system representing a complex mechanical system and a water jet cutting machine representing a mechatronic system. The general knowledge gained from these case studies should be a good base for coming implementation of this approach as an inherent working routine in companies developing complex mechanical and mechatronic products. A specific result is a validated virtual model of the exhaust system, which facilitates fast structural dynamics simulation of customer proposed design layouts. It is also shown that the non-linear flexible joint between the manifold and the rest of the exhaust system makes the system behaviour complex. This has resulted in an additional general research question, namely how systems that are linear, except for small but significant non-linear parts, can be simulated in an efficient way. Another specific result is a validated real-time virtual machine concept for simulation of the water jet cutting machine, which facilitates early-stage design optimisation. As the mechanics and the control system are considered simultaneously, interaction effects can be utilised. An introductory optimisation study shows a significant potential for improved manufacturing accuracy and a more light-weight design. This potential would not likely have been found through a conventional sequential design approach. The results of this thesis indicate that there is a great potential for improved product development performance in small and medium-sized companies. By incorporating modern simulation support these companies can improve their competitiveness as well as contribute to improved resource efficiency of society at large. In doing so, it is important to find a good balance between model fidelity, validity and cost for achieving a relevant decision support. The coordinated approach to simulation-driven design elaborated in this thesis is a promising and systematic way of finding this balance.

  • 309. Wall, Johan
    et al.
    Englund, Thomas
    Ahlin, Kjell
    Broman, Göran
    Influence of a bellows-type flexible joint on exhaust system dynamics2004In: Proceedings of the Institution of mechanical engineers. Part D, journal of automobile engineering, ISSN 0954-4070, E-ISSN 2041-2991, Vol. 218, no 12, p. 1473-1478Article in journal (Refereed)
    Abstract [en]

    Most modern cars have a bellows-type flexible joint between the manifold and the catalytic converter to allow for thermal expansion and to decouple large engine movements and vibrations from the rest of the exhaust system. To obtain better understanding of the influence of this joint, the dynamic response of a typical exhaust system is studied when excited via different joint configurations. Measurements show the great order of reduction of vibration transmission to the exhaust system that a bellows joint, with and without an inside liner, gives in comparison with a stiff joint. For the combined bellows and liner joint vibration transmission is however higher than for the bellows alone. Together with some other aspects this makes the choice of including a liner in the exhaust system application complex. For a system in general the possibility of tuning the friction limit of the liner, to minimise overall vibrations through friction based damping, depends on how close to ideal the excitation source is and its location. Anyhow, the combined bellows and liner joint makes the exhaust system behaviour significantly non-linear, whereas the system behaviour proves to be essentially linear when the bellows has no liner, which imply that the liner needs to be included in theoretical models when present in the real system.

  • 310. Wall, Johan
    et al.
    Englund, Thomas
    Ahlin, Kjell
    Broman, Göran
    Modelling of multi-ply bellows flexible joints of variable mean radius2003Conference paper (Refereed)
    Abstract [en]

    Bellows flexible joints are included in automobile exhaust systems to allow for engine movements and thermal expansion and to reduce vibration transmission. Generally the joint consists of a flexible bellows, an inside liner and an outside braid. In this work the bellows is considered. A straightforward way to model the bellows is to use shell finite elements. Due to the convoluted geometry of the bellows that procedure requires however a high number of elements, meaning that the bellows model would constitute a large part of the model of the exhaust system. For more effective dynamics simulations a beam finite element representation of the bellows has been presented in a prior work. This modelling procedure was implemented in the commercial software I-DEAS and was verified against experimental results available in the literature for single-ply bellows of constant mean radius. This paper suggests adjustments by which this procedure can be extended to model also multi-ply bellows of variable mean radius. Experimental investigations of a double-ply bellows having decreasing mean radius towards its ends are included for verification. The agreement between theoretical and experimental results is very good, implying that the suggested extension of the modelling procedure is valid. It is also shown that the procedure can easily be implemented into other commercial software (in this case ABAQUS). The experimental investigation reveals an intriguing resonance frequency shift at small excitation force levels. Although considered to be of minor significance for the present application of the bellows, a hypothetic qualitative explanation to the observed phenomenon is given.

  • 311. Wall, Johan
    et al.
    Englund, Thomas
    Berghuvud, Ansel
    Identification and Modelling of Structural Dynamics Characteristics of a Water Jet Cutting Machine2004Conference paper (Refereed)
    Abstract [en]

    Dynamic characteristics of a water jet cutting machine, to be used in a virtual machine implemented in an analysis tool for engineering design, are derived. Machine users need for more cost effective production put demands on faster cutting. Faster cutting results in higher dynamic loads. As a consequence, problems with unwanted vibrations that decrease cutting precision may occur. Prediction of such potential problems is facilitated by an analysis tool for evaluation of suggested design solutions early in the product development process. The present work contributes to ongoing development of such an analysis tool for design engineers. An iterative approach including both theoretical and experimental analysis is applied in order to derive a structural dynamics model of the studied machine. A complex dynamic behaviour of the machine is found. High correlation between results obtained from theoretical and experimental modal analysis implies that the developed model can be used with confidence in future studies of the machine’s total system behaviour.

  • 312. Wallin, Johanna
    et al.
    Chirumalla, Koteshwar
    Thompson, Anthony
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Developing PSS Concepts from Traditional Product Sales Situation: The Use of Business Model Canvas2013Conference paper (Refereed)
    Abstract [en]

    In recent years there has been growing interest in utilizing a product-service system (PSS) approach when developing products and services in order to arrive at a business model focused on selling function or availability instead of physi-cal products. However, the complex nature of PSS development has left many manufacturers still struggling to arrive at PSS concepts out of their traditional product sales situation in early design phases. The purpose of this paper is to propose an approach using the Business Model Canvas which could help manufacturers in the transition towards PSS development by articulating key business elements in developing and analyzing PSS concepts evolving from their traditional product sales situation. The paper presents preliminary findings from the aerospace industry and discusses the evolution of key business elements for PSS concepts from traditional product sales situation using the Business Model Canvas. Finally, the potential benefits of using the Business Model Canvas in a PSS context are discussed.

  • 313.
    YAGCI, Mehmet Yalcin
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Sound Phase Change over Barriers2009Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Noise Barriers are used for cancellation of sound from roads. Sound of different frequencies travel differently over the top of the barriers. Design of barriers differ. Sound phase change can play an important role in noise cancellation. The aim of this thesis is to simulate the source, noise barrier, receiver environment by software and investigate the sound phase change for different designs of the top of noise barriers. Linear Acoustics and Wave Theory is used for wave propagation.

  • 314. Yang, Geng
    et al.
    Li, Xie
    Mäntysalo, Matti
    Zhou, Xiaolin
    Pang, Zhibo
    Xu, Li Da
    Kao-Walter, Sharon
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Chen, Qiang
    Zheng, Lirong
    A Health-IoT Platform Based on the Integration of Intelligent Packaging, Unobtrusive Bio-Sensor and Intelligent Medicine Box2014In: IEEE Transactions on Industrial Informatics, ISSN 1551-3203, E-ISSN 1941-0050, Vol. 10, no 4, p. 2180-2191Article in journal (Refereed)
    Abstract [en]

    In-home healthcare services based on the Internet-of-Things (IoT) have great business potential; however, a comprehensive platform is still missing. In this paper, an intelligent home-based platform, the iHome Health-IoT, is proposed and implemented. In particular, the platform involves 1) an open-platform-based intelligent medicine box (iMedBox) with enhanced connectivity and interchangeability for the integration of devices and services, 2) intelligent pharmaceutical packaging (iMedPack) with communication capability enabled by passive radio-frequency identification (RFID) and actuation capability enabled by functional materials, and 3) flexible and wearable bio-medical sensor device (Bio-Patch) enabled by the state-of-the-art inkjet printing technology and system-on-chip. The proposed platform seamlessly fuses IoT devices (e.g., wearable sensors, intelligent medicine packages, etc.) with in-home healthcare services (e.g., telemedicine) for an improved user experience and service efficiency. The feasibility of the implemented iHome Health-IoT platform has been proven in field trials.

  • 315. Yang, Kai
    et al.
    Mfoumou, Etienne
    Kao-Walter, Sharon
    Chi, Yilin
    Experimental Study of Packaging Materials Based on Acoustic Measurements Combined with Tensile Tests2009Report (Other academic)
    Abstract [en]

    In this report, we investigated the variation between tension and fundamental frequency with respect to time, and at a constant strain rate. This was done for rectangular thin sheets under uniaxial tensile test and transverse vibration. Thin Paper (PPR), Low Density Polyethylene (LDPE) and laminate (PPR/LDPE/Al-foil) sheets were analyzed both within the elastic and plastic (which was investigated in this work) regions. The emphasis is on the linear relationship between the resonance frequency (in square) and the load.

  • 316.
    Zettervall, Björn
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Ekholm, Henrik
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Modal Analysis on an Exhaust Manifold to define a Catalyst FE-model2008Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Faurecia Exhaust Systems AB develops and manufactures exhaust manifolds for the car industry. In the developing process the FE-models are one of the main tools and they are becoming more and more important in the automotive development. In the tough competition between the manufacturers, the demands for fast development require good FE-models both from the manufacturers and their subcontractors. The main goal of this thesis is to update an existing FE-model of a close coupled exhaust manifold and look at the catalyst to investigate the behavior of the catalytic converter and suggest a way to model the monolith. The thesis combines analytical calculations with experimental measurements. By the use of modal theory, an analytical model is updated to resemble the experimental data. The results of this thesis work include a description of an updated version of the FE-model of the exhaust manifold. It also includes one example of how to model the catalyst assembly. The model of the catalyst assembly has been validated. The initial Finite-Element model showed relatively large differences for the first four natural frequencies, when compared to experimental data. Relatively large amplitude errors were also obtained when comparing frequency response function from the experiment and the model. An acceptable error was obtained for the natural frequencies when comparing the experimental result and the updated Finite-Element Model. The updating was mainly done by changing the mass and stiffness in the welds and the converter tube.

  • 317. Åsa, Ericson
    et al.
    Tobias, Larsson
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Ola, Isaksson
    Andreas, Larsson
    Revisiting the Research Field of Product-Service Systems Development2012Conference paper (Refereed)
    Abstract [en]

    The research within the Product-Service Systems (PSS) field aims to support manufacturing industries’ ability to provide value in terms of a service offer to its customers, simultaneously taking a more holistic approach to eco- sustainability. The industrial idea of providing customer benefits in parallel with robust products is not new, yet equipping engineers to conduct innovation and applying a service perspective in the early design stages is noticed as fairly radical. The purpose in this paper is two-fold. First, to describe research efforts within the PSS field seen through our engineering design lenses, second, to explore and discuss plausible directions and by that identify “white spots” on the map, which may be seen as relevant directions for future research.

  • 318.
    Öberg, Hjalmar
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Performance evaluation of a simplified FEM-tool for designers.2008Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    On today’s competitive market it is important to analyse and optimise product performance. The finite element method is a very common tool to do so when dealing with stress analysis. There are many different commercial finite element software available on the market. They range from complex ones needing special skills for proper use to more easy to use aimed at design engineers with little experience of the finite element method. The latest versions of Autodesk Inventor include a stress analysis tool that falls under the second category (easy to use). The analysis tool of Inventor is only able to perform a few types of analysis, and the user control is limited. The question is how well this tool works. What are its strengths and weaknesses? This thesis aimed to answer those questions. This was done by analysing a few “benchmarks”. Some of the analysed parts are just made up for this thesis, but most of them are provided by Water Jet Sweden AB, and are typical parts from a water jet cutting machine. These benchmarks has been thoroughly tested using both modal and stress analysis. The results from Inventor have then been compared with analysis results from I-deas, a well known commercial finite element software. The aim of these tests is not to see how close to reality Inventor gets, but if it gets a result close to a more advanced FE-tool. Depending on the benchmark different results is presented. For the larger parts and for the beams both stress and modal analysis are made, and the first six modes are presented. The deflection/deformation is shown for most benchmarks and equivalent/von Mises stress is shown for all. It is shown that the analysis tool in Inventor works fine when it comes to small and/or simple parts. Furthermore it is very easy to use compared with I-deas, although the solving time sometimes is rather long for big parts. A few problems do however exist. The main problem is that if the difference between the smallest and largest dimension in the part is big, the part cannot be meshed. This problem occurred mainly on benchmarks including long beams. The conclusion of this work is that as long as one can mesh the part fairly good results are attained. It may take a long time to solve, but one can trust the result.

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