PhD scholarship in Experimental and modelling study of the composite pultrusion process for manufacturing of pre-fabricated elements for wind turbine blades

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The Section for Composites and Materials Mechanics, DTU Wind Energy, is seeking a PhD student for an experimental and modelling study of the composite pultrusion process for manufacturing of pre-fabricated elements for wind turbine blades. The PhD scholarship is part of the OPTI_MADE_BLADE project funded by the Innovation Fund Denmark. The project targets the development of design and manufacturing solutions for large (over 70m) offshore wind turbine blades. Offshore wind power holds a very large potential as a green source of energy. However, offshore wind turbines need to raise their cost competitiveness to ensure economic viability. The overall scientific idea in OPTI_MADE_BLADE is to enable a paradigm shift in the design and manufacturing of offshore wind turbine blades, and realize a design-for-manufacturing concept by the use of pre-fabricated elements to reduce cycle time, and ultimately, to reduce the cost of energy. Pultruded high-performance carbon fibre composite profiles will be used as pre-fabricated elements. It is hypothesized that pre-fabricated elements, when consolidated into the blade structure, will lead to optimized materials placement and fibre alignment, and thereby to improved performance of the blade. Job description The aim of the PhD study is to develop experimentally based models for the manufacturing of composite materials by the pultrusion process, covering the process conditions and composite architecture, together with the resulting mechanical properties of the composites. The work will be carried out in close collaboration with Fiberline Composites, one of the industrial partners in OPTI_MADE_BLADE. Fiberline Composites is a world-leading company specialised in pultrusion of composite products, and with a focus on innovative solutions. The improved manufacturing technology for pre-fabricated elements, to be used for wind turbine blades, will be established by developing a new impregnation chamber for the pultrusion process, and by optimising the curing scheme for the resin. Process development work will be done to optimize fibre alignment, fibre wetting, and fibre content, and to reduce residual stresses and porosity in the pultruded composite materials. Specifically, the PhD study will cover the following areas, with focus on both measurements and models: •Polymer chemistry of thermosetting resins. •Cure kinetics of resins. •Manufacturing induced residual stresses, and resulting shape distortions in composites •Composite architecture, e.g. fibre alignment, fibre and porosity content. •Composite mechanical properties, static and dynamic. •Altogether, the PhD study will provide a fundamental research study on composite materials processing and properties, in order to support the related technological developments in the OPTI_MADE_BLADE project. Qualifications Candidates for the PhD study should have a master s degree in engineering, or a similar degree with an academic level equivalent to the master s degree in engineering. In the assessment of the candidates, consideration will be given to: •Knowledge on polymer chemistry, specifically thermosetting resins used for composites. •Experience in the use of thermal analysis techniques, e.g. DSC and DMA. •Experience with development and application of cure kinetic models for composite materials with continuous fibres. •Knowledge on the measurements and modelling of residual stresses in composites. •Knowledge and experience in measurements and modelling of mechanical properties of composites. •Good skills in analysis of experimental data and their use in model validation. •Good collaborative skills. •Ability to communicate at all levels such as the provision of scientific advice to industry. •Good English speaking and writing skills. Supervisor(s) Main supervisor: Bo Madsen, DTU Wind Energy Co-supervisors: Kristoffer Almdal, DTU NanoTech Tom L. Andersen, DTU Wind Energy Approval and Enrolment The scholarships for the PhD degree are subject to academic approval, and the candidates will be enrolled in one of the general degree programmes of DTU. For information about the general requirements for enrolment and the general planning of the scholarship studies, please see DTU PhD Guide. Assessment The assessment of the applicants will be made by Head of Section Professor Bent F. Sørensen, Senior Researcher Bo Madsen and Senior Development Engineer Tom Løgstrup Andersen. We offer An interesting and challenging job in an international environment focusing on education, research, public-sector consultancy and innovation, which contribute to enhancing the economy and improving social welfare. We strive for academic excellence, collegial respect and freedom tempered by responsibility. The Technical University of Denmark (DTU) is a leading technical university in northern Europe and benchmarks with the best universities in the world. Salary and appointment terms The salary and appointment terms are consistent with the current rules for PhD degree students. The period of employment is 3 years. Expected start date is 1 October 2015. Work place The work place is DTU Risø Campus. Further information Further information may be obtained from main supervisor Bo Madsen, tel.: +45 4677 5885, boma@dtu.dk; Team Leader Tom L. Andersen, tel.: +45 4677 5741, toan@dtu.dk or Head of Section Bent F. Sørensen, tel.: +45 4677 5806, bsqr@dtu.dk. Please do not send applications to these e-mail addresses, instead apply online as described below. You can read more about DTU Wind Energy on http://www.vindenergi.dtu.dk Application Please submit your online application no later than 17 September 2015. Applications must be submitted as one pdf file containing all materials to be given consideration. To apply, please open the link "Apply online," fill in the online application form, and attach all your materials in English in one pdf file. The file must include: •A letter motivating the application (cover letter) •Curriculum vitae •Grade transcripts and BSc/MSc diploma (an official translation into English) •An Excel sheet with translation of grades to the Danish grading system (see guidelines and excel spreadsheet here) •Candidates may apply prior to obtaining their master s degree, but cannot begin the PhD study before having received it. All interested candidates irrespective of age, gender, race, disability, religion or ethnic background are encouraged to apply. DTU Wind Energy has more than 240 staff members, including 150 academic staff members and approximately 50 PhD students. DTU Wind Energy has a considerable degree of innovation and cooperation with companies and sector associations within the wind industry in Denmark and abroad. The research is conducted within the three main topics of wind energy systems, wind turbine technology, and basics for wind energy. DTU Wind Energy is one of the largest and most prominent research institutions within wind energy. DTU is a technical university providing internationally leading research, education, innovation and public service. Our staff of 5,800 advance science and technology to create innovative solutions that meet the demands of society; and our 10,300 students are being educated to address the technological challenges of the future. DTU is an independent academic university collaborating globally with business, industry, government, and public agencies.

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source: https://www.ec.europa.eu/eures

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