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Dissertations / Theses on the topic 'The Mechanical Design Process'
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Esawi, Amal M. K. "Systematic process selection in mechanical design." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260399.
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Carvajal, Michael Angelo. "The design process for wheel-robot integration." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/54528.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 65-66).
In this thesis, the design process for wheel-robot integration was documented and reflected on. The project focused on redesigned certain aspects a half-scale wheel-robot to be integrated with a half-scale CityCar prototype being built by the MIT Media Lab's Smart Cities Group. Primary attention was spent on analyzing the required steering torque need to maneuver the half-scale vehicle, and on implementing a design where the wheel-robots steered about the axis that passed through the center of gravity of the tire component. Budget and time constraints required quick and easy solutions to the design and integration of the wheel-robot components. A half-scale prototype made by Media Lab graduate student Peter Schmitt was used as a benchmark for the new wheel-robot design and an analysis of Schmitt's prototype is documented. Though many ideas and concept variations were explored during the design process, a complete design of the wheel-robot was not finalized in time for this report. More time must be spent in order to finalized an integration process that can be scaled up to the full-scale CityCar for future use in urban mobility improvement.
by Michael Angelo Carvajal.
S.B.
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Hanson, James A. (James Andrew) 1976. "Improving process capability data access for design." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/88897.
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Johnson, Anthony. "Sustainability - its incorporation into the mechanical engineering design process." Thesis, University of Huddersfield, 2014. http://eprints.hud.ac.uk/id/eprint/24275/.
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As an engineering design practitioner both as an educator as well as a practicing design consultant it became clear that there was a need for a sustainability measurement tool for the mechanical engineering product designer who actually designs products, that is, the engineer who drives the Computer Aided Design (CAD) station. This need was confirmed upon consulting several publications but in particular the codes of practice of the Institution of Mechanical Engineers, (I.Mech.E.) [A1.1], American Society of Mechanical Engineers (ASME) [A1.2], and The Royal Society of Engineers (RSoC) [A1.3], who prominently advocate sustainability practices to member engineers. This research project aims were formulated to derive a sustainability measurement system for new products across the entire product life cycle. The process of design was used as the system driver with ISO Standards as the system regulator. The adopted technique was to use Embodied Energy as the measurement parameter and aggregate its application to the product throughout the entire product life cycle. Furthermore, saved or generated energy was accrued and used to offset the Embodied Energy input, resulting in an energy balance sheet. A computer algorithm was devised to collect, collate and disseminate the life cycle wide generated data. A control and guidance system was also required and evolved into a top down management system from CEO to the manual worker and governed by ISO Standards.
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Harutunian, Vigain. "Representation methods for an axiomatic design process software." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/39768.
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Tanuwijaya, Willy Perdana. "Statistical control and design optimization in slitting process." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62512.
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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 75).
The incorrect slitting is the defect waste in slitting process which does not meet the single pack width and crease-to-edge width requirements. It is the highest contributor to the overall defect waste in slitting process at Company X Jurong (CXJ). To address this problem, the key input and output variables were identified. The inputs are the tension settings and knives' positioning, and the output is crease-to-edge width. The objectives are to optimize the tension settings and to achieve a centered process by a proper calibration of knives' positioning. The Design of Experiments (DoE) was conducted to study the significance of tension towards crease-to-edge width variance. For 200 mL pack size, it was found that the variance is constant within the allowable setting range. For 250 mL pack size, it was found that the overall average variance best represents the variance of the data within the allowable range. However, the process is currently off-centered. Therefore, a proper training for detecting any mean shift happening in the process to the operators utilizing the digital camera measurement system is recommended.
by Willy Perdana Tanuwijaya.
M.Eng.
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Wardell, Eric Joseph. "Concurrent Engineering through Parallelization of the Design-Analysis Process." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5281.
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The disconnect between the way CAD and analysis applications handle model geometry has long been a hindrance to engineering design. Current industry practices often utilize outdated forms of geometry transfer between these different engineering software applications such as neutral file formats and direct translations. Not only to these current practices slow the engineering design process but they also hinder the integration of design and analysis programs.This thesis proposes a new, multi-user, integrated design-analysis architecture which allows auxiliary functions such as analysis and computer-aided manufacturing to be better connected with the computer-aided design. It is hypothesized that this new architecture will reduce the time of design-analysis iterations and create more parallelization between CAD and auxiliary programs. A prototype of the proposed architecture was constructed and then tested to evaluate the hypotheses, from which it was discovered that the proposed architecture does indeed reduce the time of iterations in the design-analysis cycle and allows for the parallelization of some design and analysis tasks.
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Tata, Melissa M. 1975. "The effective use of process capability databases for design." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80635.
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Goldfine, Neil. "Process analysis and design for grinding robot tool holders." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/91315.
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Walker, Derrick Clarence. "Design of a process improvement methodology for die construction." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12353.
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Cai, Yunshen. "Electrospinning process analysis: the relation of process parameters to fiber diameter and process dynamics for closed-loop control design." Thesis, Boston University, 2013. https://hdl.handle.net/2144/21127.
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Thesis (M.Sc.Eng.) PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.The electrospinning process can produce submicron fibers for a variety of applications since a wide range of polymers can be used. For many advanced applications, achieving the desired fiber diameter, maximizing productivity, and achieving high yield are important production objectives. This thesis addresses several important areas needed to develop a general electrospinning control approach that aids in achieving those objectives including: developing a correlation between process conditions to fiber diameter, developing a method to determine an operating regime that meets manufacture objective, identification of process dynamics needed to develop a realtime control system, and insight into the role that relative humidity (RH) has on the process physics. A primary requirement for developing a general electrospinning control approach is to develop a correlation that maps measurable process parameters to the resulting fiber diameter, since electrospun nanofibers can not be observed in real time. Building on Yans identification of a fiber diameter correlation based on measuring the processes straight jet diameter and the ambient relative humidity for Polyethylene oxide (PEO)/water solutions, this thesis extends that work for a different polymer (Poly(vinylpyrrolidone) (PVP)) using three non-aqueous solvents. A correlation of process measurements to fiber diameter is developed, which is useful for both determining the operating regime (specification of voltage, flow rate and RH that meets the manufacturing objectives) as well as real-time control system design. An interpretation of experimental results also provides insight into the multiple roles that RH has on the electrospinning process physics in terms of the effective electric field that determines the upper jet geometry and current; the total solvent evaporation rate; and the impact of the electric stretching forces in the bending region A generalized operating regime determination strategy is presented that obtains the desired fiber diameter with maximum production rate. In addition, the process dynamics characteristics and how they scale with different operating conditions are identified, which is needed to develop real-time control algorithm. The process dynamics of PVP/alcohol solutions are shown to be similar to those of PEO/water solutions, and are determined by the Taylor cone volume dynamics.
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Magill, W. R. "A generative Computer Aided Process Planning system." Thesis, University of Newcastle Upon Tyne, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328585.
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Glancy, John Elliott Jr. "Manufacturing cost modeling and robust process design." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12810.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1992 and Thesis (M.S.)--Sloan School of Management, 1992.Includes bibliographical references (leaves 93-94).
by John Elliott Glancy.
M.S.
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Obert, Emily. "The bioinspired design process : according to project complexity and motivation." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81619.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2013.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 51-53).
Taking cues from natural creatures and systems is becoming a more widely used technique in engineering design. This design philosophy or technique is referred to as bioinspired design or biomimicry. Prior art has focused on problem-driven and solution-based bioinspired process without reflection upon the nature of the engineering challenges to which the technique is being applied, or the motives for applying this design philosophy. After interviewing nine researchers from six different laboratories at MIT about bioinspired design projects and processes, some commonalities and differences in bioinspired design process were observed. This thesis generalizes these observations to propose four unique bioinspired design processes, each tailored to one of the following: problem-driven low-complexity systems, problem-driven complex systems, inspiration-driven low-complexity systems and inspiration-driven complex systems. The steps of visualization, data extraction, modeling, optimization, design and fabrication are detailed, with the aim of guiding designers away from commonly encountered problems. Additionally, it was found that relationships between biologists and engineers can be strained by differing goals, timelines and vocabulary, but that engineers applying bioinspired design techniques find these relationships to be valuable and seek to strengthen them.
by Emily Obert.
S.M.
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Krishnan, Viswanathan. "Design process improvement : sequencing and overlapping activities in product development." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12502.
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Kerwin, John-Michael J. "Selected Design Process Examples of a Two-Axis Gimbal System." Thesis, The George Washington University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10822028.
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The contribution of this thesis is threefold. First, it provides a thorough example of an engineering designer's approach to solving a complex open-ended design problem. Second, it presents a compendium of requirements and respective key strategic drivers to fulfill those requirements when designing a machine for a marine environment. Third, it presents a two-axis gimbal system design for marine applications. The scope of the design includes requirements through a preliminary design review with focus on methods to generating solutions, analyzing and evaluating those solutions, and selecting the best option. Analysis aspects cover design methods for resistance to the effects of greenwater loading, wind loading, vibration loading, shock loading, icing/freezing rain, temperature, humidity, corrosion, and foreign object ingress in a marine environment. The deterministic design methodology and design tools are applied from Slocum's Fundamentals of Design in which the design generation and selection steps are iterated from a strategic level down to individual components. The resulting two-axis gimbal system design is a compact, environmentally rugged, side-table, split-payload style gimbal that fulfills the desired requirements. This gimbal system differs from most commercially available systems with enhanced design features for severe operational loading environments, severe environment resistance, and increased system accuracy, repeatability, and maintainability.
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Sarac, Sevgi. "Design And Thermo-mechanical Analysis Of Warm Forging Process And Dies." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608826/index.pdf.
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Forging temperature is one of the basic considerations in forging processes. In warm forging, the metals are forged at temperatures about the recrystallization temperature and below the traditional hot forging temperature. Warm forging
has many advantages when compared to hot and cold forging. Accuracy and surface finish of the parts is improved compared to hot forging while ductility is increased and forming loads are reduced when compared to cold forging. In this study, forging process of a part which is currently produced at the hot forging temperature range and which needs some improvements in accuracy, material usage and energy concepts, is analyzed. The forging process sequence
design with a new preform design for the particular part is proposed in warm forging temperature range and the proposed process is simulated using Finite Element Method. In the simulations, coupled thermal mechanical analyses are performed and the dies are modeled as deformable bodies to execute die stress analysis. Experimental study is also carried out in METU-BILTIR Center Forging Research and Application Laboratory and it has been observed that numerical and experimental results are in good agreement. In the study, material wastage is reduced by proposing using of a square cross section billet instead of a circular one, energy saving and better accuracy in part dimensions is achieved by reducing the forging temperature from the hot forging to the warm forging temperature range.
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Rintamäki, Julia. "Development of Parking Brake Component : Product Development and Mechanical Design Process." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-20812.
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This report represents the bachelor thesis examination by Julia Kastehelmi Rintamäki. The examination has been performed during spring semester 2013 at Volvo Construction Equipment in Eskilstuna. This report, Development of parking brake component, describes the product development process of the parking brake component for articulated hauler, wheel loader and grader. Volvo CE has problems with the parking brake switch that exist today on articulated hauler, wheel loader and grader. The purpose of this project is to develop one common solution for the parking brake component for articulated hauler, wheel loader and grader. The secondary purpose is to find final concept proposal for each machine. Employees at the Volvo CE were interviewed; they were contacted via e-mail, phone calls and via meetings to get the information about the machines and the information around the parking brake component. Volvo CE databases were also used for gathering information about standards and pictures. Lots of different ideas were sketched and concept proposals were created with the aid of material from marketing analysis, competitor analysis, target group analysis, requirement specification, function analysis, standards and ergonomics. Eight concept proposals were chosen to be evaluated with QFD, Pugh’s matrix and FMEA. Two concepts were most suitable and developed further to three dimensional models with the aid of Solid Works. The different aspects were taken into account when designing and dimensioning the final concepts. Two models were created with the aid of plasticine for figuring out the ergonomics and dimensions of the product. DFM, DFA, DFE, D4S were used for taking into account costs, assembly, dimensions and environmental impacts of this product. One of the concepts could replace the existing parking brake switch and suit in different cabins because of its size and design. This concept can be located on vertical or on horizontal plane. The other final concept solution functions better for the articulated hauler on account of the double function with exhausting brake system activating before parking brake system. Suggestion for next steps for the project could be to make prototypes of the two concepts and test these components in real machines. Also interviewing users for further development of the final concepts and redesign if needed.
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Smith, Rebecca A. (Rebecca Anna). "Analyzing patterns of writing and sketching in the product design process." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/54491.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009."June 2009." Cataloged from PDF version of thesis.
Includes bibliographical references (p. 23).
Design notebooks, or logbooks, are typically used to record notes during the design process. These notes consist of text entries as well as sketches with varying levels of detail. Previous research on the design process has focused on sketches, including their effect on design outcome, differences based on prior sketching experience, and more. This paper looks at the interplay between text entries and sketches in design notebooks, and analyzes patterns that appear over the course of the design process. Data collected from eighteen logbooks from the class Design-a-palooza shows that trends exist between writings and drawings in the design process. The results of analysis of this data show that the number of sketches in a logbook increases following drawing instruction, and the design process typically starts with more text entries in logbooks, including customer needs research, followed by this increased number of sketches and then a decrease in all entries as prototyping occurs. The analysis was inconclusive in determining if students who write more ideas with text will sketch fewer ideas, as well as the relationship between partners' logbook entries. Recommendations for future research in these areas of design research are presented.
by Rebecca A. Smith.
S.B.
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Fan, Victoria Y. (Victoria Yue-May). "Design of a crushing and agglomeration process for manufacturing bagasse charcoal." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36309.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.Includes bibliographical references (leaves 33-34).
In Haiti, wood and wood charcoal are common fuels for cooking. This practice has contributed to deforestation, leading to erosion and fatal floods. The availability of charcoal made from a different source other than wood, such as agricultural waste, might provide Haitians with an alternative, more sustainable fuel, which in turn may reduce fuel prices. MIT students have developed various methods for producing charcoal out of simple inexpensive devices. In a current manufacturing process, carbonized bagasse is crushed to a powder, then mixed and agglomerated with yucca binder into balls. A novel method may reduce operator exposure and inhalation of charcoal fines by keeping primary manufacturing phases in the oil drum and reducing the operational steps of transferring the material from one location to another. The goal of this thesis was to understand, test, and optimize the parameters of this novel crushing and agglomeration process. The final prototype was found to effectively crushing charcoal and mix charcoal with binder to some extent, while being an inexpensive alternative to reduce overall charcoal exposure. However, the mixing and agglomeration was not sufficiently uniform and further designs should be considered to increase uniformity of mixing of binder and charcoal.
by Victoria Y. Fan.
S.B.
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Hidalgo, Maria E. (Maria Estela) 1982. "Implementation of finite element analysis into the athletic shoe design process." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32810.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.Includes bibliographical references (leaf 32).
Finite element analysis is used by companies throughout the world as a substitution for manually testing prototypes. With the assistance of finite element analysis many companies and industries have decreased the time and cost of product production. Currently, the athletic shoe industry does not use finite element analysis in the shoe development process. The goal of this project was to implement finite element analysis into the athletic shoe design process with the intent of decreasing time to market and cost. This effort determined finite element analysis is not recommended to design and test an entire athletic shoe. The human factors and variability make simulation wear-tests on an entire shoe nearly impossible to accurately replicate via finite element analysis. Though human factors affect the entire shoe the most critical component, the heel cushion, is affected only slightly. Since a person's heel is in the shape of a ball, the variation of external forces caused by human factors is not significant. Thus, finite element analysis can be used to design and test the cushion of athletic shoes.
by Maria E. Hidalgo.
S.B.
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Nerurkar, Tanay Rahul. "Design of experiments on a semiconductor plasma ashing process : methods and analysis." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107024.
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Thesis: M. Eng. in Advanced Manufacturing and Design, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 115-117).
Characterizing and controlling process variations in semiconductor manufacturing processes is crucial to ensure the extremely low defect and scrap rates that are needed for semiconductor manufacturing companies to maximize profitability. As semiconductor device critical dimensions become smaller and chips become more complex, and with customers inquiring about process capability metrics to make sure they get the highest quality product, there is a need for chip manufacturers to thoroughly analyze and define their process capabilities. The work in this thesis done in collaboration with Analog Devices Inc., a leading chip manufacturer, shows how the concept of design of experiments (DOE) and statistical regression modeling techniques can be implemented in a practical industrial setting to rigorously understand and mathematically characterize process variations in a semiconductor fabrication process (plasma ashing). New approaches are introduced to Analog Devices Inc. in calculating wafer statistics. Methodologies are developed that will help the company to choose the right experimental designs based on the objective (e.g. accurate prediction of the response variable, process optimization, process robustness, etc.) while taking into account the process, time, and cost constraints. Multiple regression modeling techniques are utilized to analyze the outcomes of the experiment and the results of these techniques are compared to each other in order to choose the right model needed to satisfy the objective. The statistical software JMP is used to tease out subtle implications of the outcomes of the DOE and formulate hypotheses about any anomalies. The DOEs are performed on two Gasonics Aura 3010 machines that carry out the plasma ashing process using the same process parameters in order to highlight not only the similarities but also the differences in the machines which come from factors like the intrinsic build and state of the machines. The findings and results identify opportunities for the development of new process improvement strategies, faster root cause analysis of failures, methods to systematically calibrate new equipment, update standard operating procedures, and opportunities for machine matching. The purpose of this thesis is to serve as a pedagogical document and template for the process engineers at Analog Devices Inc. in the future to perform DOEs on other processes and machines in the fabrication center.
by Tanay Rahul Nerurkar.
M. Eng. in Advanced Manufacturing and Design
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Fan, Huangjia (Francis Huangjia). "Statistical control and experimental design for edge bead reduction in laminating process." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62540.
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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 77-78).
Edge bead formation is a well-known phenomenon typically happening in the lamination due to the physics of this process. It causes the defect of high edge observed in the carton roll after the laminated carton sheets are wrapped around the roller in Company X; the affected carton sheets can no longer be fed into customers' filling machines due to the uneven surface. To address this problem, a model with process parameters and quality characteristics was built to define the lamination. Based on this model, the capability of measurement system was verified and current process capability was calculated. After that, Shewhart control charts were employed to identify the assignable causes and to bring the process to in-control state. Then, a designed experiment was conducted to find the optimal operating conditions. It was found that line speed, screw speed, die-bolt power and die-lip build-up are most likely to be subject to disturbances. In addition, diebolt power, manifold plug and deckle blade have a statistically significant impact on the edge bead formation. As a result, an out-of-control-action plan was proposed and a recipe is recommended for edge bead reduction in laminating process.
by Huangjia Fan.
M.Eng.
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Looney, Erin Elizabeth. "Oxygen defect engineering for silicon solar cell applications : process design and modeling." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111715.
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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 78-82).
One of the main remaining impurities that lowers efficiencies of silicon solar cells are oxygen ring defects that are incorporated into the material during growth. These defects decrease overall cell efficiencies by around 20% (rel.) resulting in a yield loss of about 1/4 h of each monocrystalline silicon ingot. To control the oxygen defects and put them in the least harmful form possible, a new cell processing step call tabula rasa (TR) is explored. TR is a high temperature process for a short duration. In this work, TR is found to be a kinetically-limited process through several oxygen precipitate dissolution experiments from which the activation energy of dissolution is found to be equivalent to the migration enthalpy for oxygen in silicon. With this knowledge, a predictive kinetic model is built which can be used for process optimization. A multiscale end-to-end model is also developed to determine the effect of rings on cell performance. Using oxygen defect parameter inputs, device modelling, and a spatially resolved two diode mesh, PL images are transformed into current maps and used to determine cell efficiencies for inhomogeneously distributed defects. A reduction in efficiency for cells with ring defects is simulated for several ring defect concentrations and compared to a non-defective cell. Another strategy for lowering cost and mitigating oxygen ring defects is using thinner silicon absorbers with inherent defect tolerance. Using the multiscale modeling platform described above, thin silicon wafers are compared to typical cells. It is shown that thin cells with ring defects perform with higher efficiencies, with less than half the material used. The thin silicon strategy is compared with the TR process addition, and future work is outlined to further explore these oxygen mitigation options.
by Erin Elizabeth Looney.
S.M.
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Jansson, Mikael. "Hydro-mechanical forming of aluminium tubes : on constitutive modelling and process design." Doctoral thesis, Linköping : Linköping University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8161.
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Sturnick, Gerald R. "Integration of computer-aided design techniques into the mechanical product development process /." Online version of thesis, 1989. http://hdl.handle.net/1850/10477.
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Iso-Junno, T. (Terho). "Efficient use of Creo Simulate as a part of mechanical product design process." Master's thesis, University of Oulu, 2017. http://urn.fi/URN:NBN:fi:oulu-201701121047.
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In this thesis, how Creo Simulate can be used efficiently during a mechanical product design process is studied. The purpose of this thesis was to produce simulation training material to be used at Nokia. The aim was to create material which would be accessible for all of Nokia’s mechanical designers who could study strength simulation and perform strength simulations on their designs. With strength simulations it is possible to reduce the design time required for the new parts since a simulated part should have the right strength properties already in first prototype. As a result of this thesis five training videos and a short Simulate workflow guide were produced for Nokia. For this thesis, the finite element method and the features available in Creo Simulate from the point of view of the mechanical engineer were studied. The researched information was gathered into this thesis to create a simulation guide for a new Simulate user. This thesis covers static strength analyses and design studies. Two case examples are included in order to clarify the simulation process with Simulate for the new usersTässä työssä on tutkittu kuinka Creo Simulatea voidaan käyttää tehokkaasti osana mekaanisen tuotteen suunnitteluprosessia. Työn tarkoituksena oli tuottaa Nokialle koulutusmateriaalia Simulaten käytöstä. Tavoitteena oli että kaikki Nokian mekaniikkasuunnittelijat voisivat opiskella lujuussimulointia ja suorittaa niitä tarvittaessa suunnittelemilleen osille. Lujuussimuloinneilla on mahdollista vähentää tarvittavaa suunnitteluaikaa uuden tuotteen kehittelyssä, koska simuloiduilla osilla pitäisi olla oikeanlaiset lujuusominaisuudet jo ensimmäisessä tilatussa prototyypissä. Työn tuloksena tehtiin Nokialle viisi koulutusvideota ja lyhyt pikaopas simulointiprosessin vaiheista. Työn aikana tutkittiin elementtimenetelmän teoriaa ja Creo Simulaten ominaisuuksia mekaniikkasuunnittelijan näkökulmasta. Tutkitusta materiaalista on koostettu tämä diplomityö siten, että se muodostaa aloittelevalle Simulaten käyttäjälle soveltuvan lujuussimulointioppaan. Tässä työssä on käsitelty vain staattinen lujuussimulointi Simulatella. Työhön on sisällytetty myös kaksi esimerkkitapausta selkiyttämään simulointiprosessin vaatimaa kokonaisuutta aloitteleville käyttäjille
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Thomas, Dale Arlington III. "A grid-level alkali liquid metal battery recycling process : design, implementation, and characterization." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/93854.
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Thesis: M. Eng. in Manufacturing, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 98-101).
The application of liquid metal batteries for large scale grid-level energy storage is being enabled through the development of research conducted at the Massachusetts Institute of Technology (MIT) in 2006. A recycling process to facilitate the end-of-life cycle for alkali or alkaline earth liquid metal batteries was designed, implemented, and characterized through a collaboration between MIT and a battery company. The process developed utilizes recycling methodologies developed and successfully implemented for the recycling of lead-acid and lithium ion batteries. The two methodologies selected for implementation were physical separation and hydrometallurgical material separation. The combination of these two methods results in the liquid metal battery process being carried out at near room temperature and atmospheric pressure. The characterization conducted demonstrated that the developed recycling process is feasible and scalable for future development.
by Dale Arlington Thomas III.
M. Eng. in Manufacturing
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Alper, Natalie B. "Early stage product design process : a case study of an educational building kit." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113504.
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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (page 35).
A Science, Technology, Engineering, and Math (STEM) kit for the assembly of a lamp was created to encourage children's interest in mechanical and electrical engineering. To ensure the lamp was intuitive and fun to use, user testing was conducted. As the user interface (UI) for the lamp was designed and developed, tests were conducted with users using a variety of prototypes ranging from paper, cardboard, and plastic to PowerPoint storyboards on the computer. By incorporating user testing throughout the process of identifying possible button layouts as well as proper lamp proportions, a final intuitive UI with a single panel of buttons was converged upon. This UI utilized one button to switch through the four possible light modes instead of having a separate button for each mode. This UI will be employed in a future prototype that will be further tested with children in the intended age range. These tests will utilize 3D printed pieces for the base and buttons, and will incorporate all the PCBs and LEDs that are intended for use in the final product.
by Natalie B. Alper.
S.B.
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Kumar, Vipin. "Process synthesis for manufacturing microcellular thermoplastic parts : a case study in axiomatic design." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14616.
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Ousterhout, Karl Brown. "Design and control of a flexible process for three-dimensional sheet metal forming." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13460.
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Beal, David Nelson 1973. "Design and use of in-process sensing and adaptive compensation ni flexible assembly." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43325.
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Påhlsson, Carl. "Improved pipe support design for the process industry to reduce mechanical loads on pumps." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-44338.
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This master thesis has been written to develop a new pipe support for pipe systems in the process industry. The purpose was to relieve pumps or other sensitive equipment from elevated forces or moments that may cause failure. The elevated forces or moments occur due to the weight of the piping, the weight of the medium and expansion due to elevated temperatures. The support is mainly designed to be implemented in a 90 degree bend but they can also be implemented in straight pipes with small adjustments of the attachment between the support and the pipe. Six different complete concepts were developed and put through different elimination matrices and evaluated against a requirement specification. The final design was calculated to withstand the forces and moments from a worst case scenario. The concept is in need of further development and testing before it can be implemented in projects. It is necessary to investigate if the clamps can withstand the working load in the new design. The concept should also be tested possibly by a prototype.
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Bromberg, Matthew F. (Matthew Fox) 1970. "Modeling design rework in a product development process." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/34712.
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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; in conjunction with the Leaders for Manufacturing Program, Massachusetts Institute of Technology, 2000.Includes bibliographical references (p. 37-38).
Managing the product development process is of vital concern to corporations. A critical aspect of product development that negatively impacts program cost and timing is rework. Unfortunately, in large organizations with successive development cycles, the product, process and organizational complexity preclude simple solutions. Even given sufficient data, many organizations do not understand what constitutes good and bad performance relative to rework. Through research at General Motors Truck Product Group, a model was developed that forecasts expected total rework. The model assumes rework is a function of: 1) The product portfolio and timing; 2) The complexity of each product program; 3) The pattern of rework over time for product programs; 4) The "lifecycle age" of each product program. The model has four potential uses: A) To aid in portfolio/project planning; B) To provide a rework performance baseline for management; C) To evaluate initiatives with regards to their impact on design rework; D) To identify leverage targets for management attention and improvement.
by Matthew F. Bromberg.
S.M.
M.B.A.
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Nordland, Kate Elizabeth. "Information flow between tools early in the engineering design process /." Online version of thesis, 2007. http://hdl.handle.net/1850/4771.
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Beltrame, Filgueiras Enrique Nicolás. "Observations of decision-making in the mechanical design process in a start-up company." Thesis, Massachusetts Institute of Technology, 2018. https://hdl.handle.net/1721.1/131014.
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Thesis: S.M. in Advanced Manufacturing and Design, Massachusetts Institute of Technology, Department of Mechanical Engineering, September, 2018Cataloged from the PDF version of thesis. "Due to the condition of the original material, there are unavoidable flaws in this reproduction. We have made every effort possible to provide you with the best copy available"--Disclaimer Notice page.
Includes bibliographical references (page 51).
This thesis examines the effect that working at a start-up company has on decisions and considerations during the mechanical design process, and is based on the experience of the author while interning at an Al robotics start-up as part of an MIT graduate students' team. An overview of the company is provided, the different stages of the product development are introduced and Miso's approach to the design of the modules for its product is discussed. Advantages and disadvantages of the approach are examined with examples, and suggestions for improvement are provided. In particular, the role of first-order-analysis (FOA) as a powerful tool to predict problems early is presented, the need for order as a necessary condition for growth is discussed, and next steps for the future production ramp-up stage are shared.
by Enrique Nicolás Beltrame Filgueiras.
S.M. in Advanced Manufacturing and Design
S.M.inAdvancedManufacturingandDesign Massachusetts Institute of Technology, Department of Mechanical Engineering
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Flores, Ryan Maximiliano. "Design of load-lock door for unit dose continuous lyophilization process for complex biologics." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127917.
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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, May, 2020Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 61-62).
The process of unit dose continuous lyophilization consists of moving vials containing unit doses of pharmaceutical product though a series of process chambers with varying pressures and temperatures. In order to move the vials between process chambers with varying pressures without disturbing the conditions within each respective chamber, a load lock is required. Although load locks are commonly used in the semiconductor industry, existing designs are not directly applicable to the unit dose continuous lyophilization process due to the unique geometric constraints on the system. This thesis document details the design of a load-lock door for the unit dose continuous lyophilization process. To meet the load-lock door functional requirements, a four-bar linkage load-lock door and a load-lock door with ground pivots offset from the sealing surface were designed. Because the driving performance parameters cannot be reliably modeled, the seal performance, particle generation, and seal adhesion of each design will be experimentally tested. The highest performing design will be chosen and improved based on the experimental results.
by Ryan Maximiliano Flores.
S.B.
S.B. Massachusetts Institute of Technology, Department of Mechanical Engineering
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Oliver, Lawrence R. (Lawrence Robert). "Process and productivity improvements through bottleneck reduction and design of experiments." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/36481.
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Thesis (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1994, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.Includes bibliographical references (p. 75).
by Lawrence R. Oliver.
M.S.
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Boessenkool, Karel, and Jonathan Meijer. "Development of a Student Bicycle : A methodological design process." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-26821.
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In this report the eight steps in systems engineering process have been followed in order to develop a student bicycle. To successfully make a student bicycle needs and preferences had to be retrieved from the students. This has been done with an online survey. The chosen concept, the Z-frame bicycle includes a unique frame, side kickstand, separate luggage carrier, integrated front light, back light mounted on the luggage carrier, an integrated chain lock, steer lock and a visible serial code on the frame. From a reliability allocation table it is estimated that the first failure that needs maintenance will occur after 226,2 hours of usage. The price of the bicycle is estimated on €189,54 (about 1600 SEK), which is within the requirements. Simulating forces on the frames in SolidWorks showed that the frames are capable of handling the weight and forces that the student produces on the bicycle. Finally the steps that need to be fulfilled to make a working prototype are displayed in a Gantt-chart. The resulted conceptual student bicycle is a good representation of what a student needs and prefers in a bicycle.
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Alhubail, Mohammad A. M. J. "Statistical-based optimization of process parameters of fused deposition modelling for improved quality." Thesis, University of Portsmouth, 2012. https://researchportal.port.ac.uk/portal/en/theses/statisticalbased-optimization-of-process-parameters-of-fused-deposition-modelling-for-improved-quality(fa9bcd34-0264-4330-9fdb-dd17a818b862).html.
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Fused Deposition Modelling (FDM) is a rapid prototyping system that produces physical models directly from the computer aided design (CAD) drawings. These models can be used to evaluate the assembly and the functionality of the design, also producing a manufacturing tools, and end-use parts. Parts built with production-grade thermoplastics that match the traditional machined parts, and according to the realworld conditions. FDM can produce instantly functional parts that used mainly in medical and automotive applications, with the use of reverse engineering techniques such as engineering scanning or digitizing systems. Knowledge of the quality characteristics of FDM fabricated parts is crucial. Quality significantly depends on process variable parameters. Optimizing the process parameters of FDM can make the system more precise and repeatable and such advancement can lead to use of FDM in rapid manufacturing applications rather than only producing prototypes. The part building is influenced by variant processing conditions. Thus, FDM process variable parameters are required to be collectively optimized rather than individually. In order to understand this issue, this study presents results of the experimental work on the effect of the main FDM process variable parameters of layer thickness (A), air gap (B), raster width (C), contour width (D), and raster orientation (E) on the quality characteristics of surface roughness (Ra), dimensional accuracy (DA), and tensile strength (TS). Previous studies have investigated the quality characteristics but limited knowledge is available on FDM newly improved materials. Thus, the new ABS- M30i biomedical material was used in this experimental work to build parts. To conduct this study, a full factorial experiment was used to obtain the test runs. A number of analytical methods such as regression analysis, Analysis of Variance (ANOVA), and Pareto analysis were used to determine the influence of the variable FDM process parameter settings. Results show that these process parameters have significant effect on the quality of finished products. For example, it has been found that the surface roughness and tensile strength of processed parts are greatly influenced by the air gap parameter as it affects the part’s beads structure, because it overlapping the material beads and consequently strengthen the beads bonding, and reduce the voids between the beads. Scanning Electron Microscope (SEM) work has been undertaken to characterise the experimental results. The results will be important for FDM produced parts in different functional applications as rapid manufacturing becomes increasingly accepted.
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Chandrappa, Kori Vinay Kumar, and Ganesan Gowtham Prasath Radhakrishnan. "Design optimization and testing of electrical connector for low voltage transmission cabinets : In collaboration with ABB AB Kabeldon." Thesis, Högskolan i Halmstad, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-40761.
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Abstract: This thesis work was a part of Halmstad University’s Mechanical Masterprogramme curriculum done in favour of ABB Alingsås. Our industrial partnerproduces and manufactures low voltage electrical distribution cabinets, connectorsand switch gears. This project is focused on specific electrical connector used inABB’s trademark cabinets. These electrical connectors serve as both the input and output points for thedistribution cabinets. The product under scope is an extension connector calledADI3M which is used in conjunction with the large sized cable connectors(AD300). This is a sequential design optimization activity performed after theredesigning of the AD300 to ensure interface compatibility and also aimed atopportunistic cost reduction. The ADI3M should provide design compatibility withboth old and new AD300 connector designs along with the comfortable interfacinginside the CDC and SDC cabinets. With the design process and concepting knowledge gained from the course work inHalmstad university along with the ABB’s industrial exposure towards the powersupply networks we proposed four different design concepts. These design conceptswere then evaluated against interface compatibility, cost aspects, manufacturingreadiness, mechanical strength, heat generation and electricity conductionproperties. Among the product development techniques, we applied QFD processto generate the concepts, waterfall method to frame the engineering design processflow and morphological matrix to select the generated concepts. We then changedthe raw material from brass to aluminium and extrusion process due to its beneficialproperties compared to brass and copper with various other reasons explainedclearly in the thesis content. For the plastic cover we preferred poly-carbonate dueto requirements such as transparency, stiffness, etc. Two of the best feasibleconcepts were selected and the design proposals were prototyped using 3D printingtechnology. The 3D printing method used was fused deposition modelling (FDM).Later machined aluminium prototypes were then produced for the metalsubcomponents to do real time strength analysis and interface checks. Weperformed a theoretical product strength analysis using ANSYS19.2. Then resultswere then evaluated, and the final concept was chosen according to the factors suchas cost impact, easy installation and comfortable inter-component clearance.Finally, the prototypes were tested for IP rating fulfilment and compatible interfaceswith adjacent components. The consecutive activities to be done out of thesis scope is to conduct mechanicaland tests and record the performance. The future scope of this project is to developa hybrid design combining the AD300 and ADI3M connectors which would enableeasy product handling, simplified functionality and further reduce cost.
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Kalsekar, Viren Sunil. "Design and process optimization of a hot embossing machine for microfluidics with high aspect ratios." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/85793.
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Thesis: M. Eng. in Manufacturing, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2013.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 138-140).
Microfluidics is a growing technology in the field of medical diagnostics. Daktari Diagnostics is a startup located in Cambridge, MA that seeks to introduce a lab-on-a-chip device for monitoring HIV in patients. This work investigates hot embossing as a prototyping process for Daktari's microfluidic device. A hot embossing system was designed and built for the purpose of prototyping a critical feature of their microfluidic network. The machine was designed for an embossing area of 6 square inches, and was found to have a maximum positional repeatability of 43 microns. The purpose of this research was to find the capabilities of the system used for hot embossing and optimize the process for maximizing the performance. The system was validated for alignment, measurement procedure and the process control. The measuring procedure was analyzed to find the best possible metric which could serve as a response variable for the performance of the process. The 'Fill ratio' of height and width were chosen as metrics for the experimental design which had precision to tolerance ratios of 0.44 and 0.33 respectively. An analysis of the factors affecting the hot embossing process was carried out using experimental design and the optimal parameters were identified. The tool temperature, pressure and the holding time were the most significant in that order. The Cp for the process with respect to the height fill was found to be 4.71 and for the width fill ratio was found to be 1.97. Using the optimal parameters the process variation of six standard deviations was found to lie within the specification limits. Hot embossing was recommended as a possible method for rapid prototyping of the assay channel and the complete cartridge at Daktari Diagnostics.
by Viren Sunil Kalsekar.
M. Eng. in Manufacturing
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Shukla, Gaurav 1978. "Augmenting Datum Flow Chain method to support the top-down design process for mechanical assemblies." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8556.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.Includes bibliographical references (p. 181-187).
The aim of this thesis is present tools which support the top-down design process for assemblies by analyzing the locating scheme or constraint structure of assemblies in absence of detailed level part geometry. The top-down design process has received attention both in academia and industry. However, there have been few analytical tools to support it. The bottom-up approach supported by CAD systems is good for detailed level design of a single part. The representation and manipulation of assemblies involves structural and spatial relationships between individual parts at a higher level of abstraction than the representation of single parts. This thesis uses the Datum Flow Chain (DFC) for symbolic representation of mechanical assemblies and screw theory for representation of constraints between two parts. DFC captures the design intent by recording location scheme of assemblies. Screw theory can represent constraints in three dimensions. This thesis presents the design steps and corresponding analytical tools for a top-down design process in a logical progressive way. The approach of bottom-up process supported by CAD systems is compared all along the presentation. A method to generate the screw theory representation of relative constraints between two arbitrary contacting surfaces is presented first. A procedure has been outlined to generate the screw representation of an assembly feature constructed by several contacting surface pairs. These tools can be used to construct screw theory representation of an arbitrarily complex assembly feature. A method of finding the constraint properties of assemblies, which uses screw theory, is presented next. The method of motion analysis can find under-constraints for all assemblies. This can be used for analysis of instantaneous kinematics of a general mechanism as well. Finding over-constraints in an assembly is a separate problem and it requires different procedure of analysis than motion analysis. This thesis presents a method of finding over-constraints of assemblies. Quantitative information about over-constraint of all assemblies may not be found in cross-coupled assemblies. Motion and constraint analyses can help assembly designers in evaluating the nominal design. A method to calculate the sensitivity of the location of a part due to variation in the location of an assembly feature is presented next. This method uses the screw theory representation of constraints and information about location of assembly features. Clearance is introduced on bi-directional assembly features to reduce the probability of interference but it introduces uncertainty in the location of parts. A method is proposed to analyze uncertainty in the location of parts due to clearance on the size dimensions of assembly features. These analysis tools can be used to check robustness of the nominal design. A classification of assemblies based upon constraint properties is presented next. This classification relates properties of constraint structure of assemblies to design context. Finally, this thesis lays out a coherent scheme of design steps forming a procedure for designing mechanical assemblies in a top-down fashion.
by Gaurav Shukla.
S.M.
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Glowa, John (John M. ). "Design and process/measurement for immersed element control in a reconfigurable vertically falling soap film." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40422.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.Includes bibliographical references (p. 24-25).
Reinforcement learning has proven successful at harnessing the passive dynamics of underactuated systems to achieve least energy solutions. However, coupled fluid-structural models are too computationally intensive for in-the-loop control in viscous flow regimes. My vertically falling soap film will provide a reconfigurable experimental environment for machine learning controllers. The real-time position and velocity data will be collected with a High Speed Video system, illuminated by a Low Pressure Sodium Lamp. Approximating lines of interference within the soap film to known pressure variations, controllers will shape downstream flow to desired conditions. Though accurate measurement still eludes those without Laser Doppler Velocimetry, order of magnitude Reynolds numbers can be estimated to describe the regime of controller inquiry.
by John Glowa.
S.B.
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Hubert, Brian Norio. "Novel process and apparatus design for metalorganic chemical vapor deposition (MOCVD) of superconducting thin films." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/41025.
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Thesis (S.B. and S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.Includes bibliographical references (leaves 73-77).
In this work, a number of YBa2Cu3Ox-7 (YBCO) superconductor deposition systems developed by various laboratories are subjected to a critical review and analysis. Deficiencies in the design of these deposition processes, and deficiencies in the design of the mechanisms and tools used to carry out these processes are identified. Most of these deficiencies have resulted in either poor end-product performance or unlikely commercial viability. For example: pulsed laser deposition systems are capable of producing very high quality YBCO superconducting films, but their deposition rates are too slow to be commercially viable; liquidsource MOCVD systems can be precisely controlled, but the solvents they require tend to kill superconducting oxides; and solid-source MOCVD systems suffer from imprecise process control, thermal degradation of precursor materials, or both. A simple and affordable MOCVD system, called ConBrio, is proposed as an alternative to existing deposition systems.
by Brian Norio Hubert.
S.B.and S.M.
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Thomas, William J. "Product, Tool, and Process Design Methodology for Deep Drawing and Stamping of Sheet Metal Parts." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1380542371.
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Arana, Semperena Igor, and San Martin Gorka Zudaire. "Redesign and new design of a tooling to avoid vibrations in a drilling process." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-18809.
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This paper presents the analysis of the vibrations created in a tooling during a drilling operation, by using indexable drills and how each variable affect in its reduction. It also shows a new design for the used tooling with the different aspects it offers. The objective followed during the development was to reduce the vibrations of the system below 5 μm, and therefore, make the process safer for the inserts and better for the tolerances and accuracy. The used method was to first study the drilling process and identify all the variables affecting to the system. Then, the analysis of the vibrations and the mass influence have been done, to continue with the possibility of adding a rubber platform, to finally, study the option of changing the transducer. Also, the design and dimensioning of the new tooling has been done. The key results of these analysis were that the mass and the rubber platform have not any influence on the vibration reduction because of the domain of the stiffness. So, changing the transducer is the only option to reduce the vibration with any tooling.
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Svensson, Marcus, and Daniel Haraldsson. "Integrating Design Optimization in the Development Process using Simulation Driven Design." Thesis, Linköpings universitet, Maskinkonstruktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157374.
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This master thesis has been executed at Scania CV AB in Södertälje, Sweden. Scania is a manufacturer of heavy transport solutions, an industry which is changing rapidly in order to meet stricter regulations, ensuring a sustainable future. Continuous product improvements and new technologies are required to increase performance and to meet markets requirements. By implementing design optimization in the design process it enables the potential of supporting design exploration, which is beneficial when products with high performance are developed. The purpose was to show the potential of design optimization supported by simulation driven design as a tool in the development process. To examine an alternative way of working for design engineers, elaborating more competitive products in terms of economical and performance aspects. Furthermore, to minimize time and iterations between divisions by developing better initial concept proposals. The alternative working method was developed iteratively in parallel with a case study. The case study was a suction strainer and were used for method improvements and validation, as well as decision basis for the included sub-steps. The working method for implementing design optimization and simulation driven design ended up with a procedure consisted of three main phases, concept generation, detail design and verification. In the concept generation phase topology optimization was used, which turned out to be a beneficial method to find optimized solutions with few inputs. The detail design phase consisted of a parameterized CAD model of the concept which then was shape optimized. The shape optimization enabled design exploration of the concept which generated valuable findings to the product development. Lastly the optimized design was verified with more thorough methods, in this case verification with FE-experts. The working method was tested and verified on the case study component, this resulted in valuable knowledge for future designs for similar components. The optimized component resulted in a performance increase where the weight was decrease by 54% compared with a reference product.
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Ozturk, Huseyin. "Analysis And Design For Aluminum Forging Process." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12610270/index.pdf.
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Aluminum forging products has been increasingly used in automotive and aerospace industry due to their lightness and strength. In this study, aluminum forging processes of a particular industrial part for the two different alloys (Al 7075 and Al 6061) have been analyzed. The forging part, forging process and the required dies have been designed according to the aluminum forging design parameters. The proposed process has been simulated by using the Finite Volume Method. In the simulations, analysis of the part during forging process has been performedand the required forging force, the temperature distribution and the effective stress distribution in the parts have been obtained. The forging dies were produced in the METU-BILTIR Center CAD/CAM Laboratory. The experimental study has been performed in the METU-BILTIR Center Forging Research and Application Laboratory. The parts were produced without any defects as obtained in the finite volume simulations. The results of the experiment and finite volume simulation are compared and it has been observed good agreement.
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Wang, Weirong. "An integrated automation extrusion die design system." Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1177702152.
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