PhD scholarship in Manufacturing and mechanical properties of fibre-hybrid composites with controlled microstructure: Assessment of synergetic effects by micromechanical modelling

DTU Wind Energy
Wednesday 04 Jul 18

HyFiSyn aims to train 13 early stage researchers to become interdisciplinary, multi-talented experts. The 8 universities, 5 industrial partners and 2 professional training organisations offer the researchers a unique opportunity to be trained by world-leading experts in cutting-edge technologies, where they are supported by a strong network and industry participation. The training programme strongly emphasises entrepreneurship and innovation skills to maximise the impact of the project, thereby increasing the EU’s innovation capacity.

Responsibilities and tasks
This PhD project evaluates the mechanical properties of fibre-hybrid composites by using micromechanical modelling on composites manufactured with controlled microstructure. The main part of the work will be performed at the Section of Composites and Materials Mechanics at the Department of Wind Energy, DTU (Denmark).

The objectives of the work are:

  • to manufacture fibre-hybrid composite laminates with designed microstructure. Focus on carbon/glass fibre-hybrid composites, but alternative type of fibres, such as natural fibres and polymer fibres, will also be investigated.
  • to measure the volumetric composition of hybrid composites, with focus on local and global fibre volume fractions.
  • to quantify the microstructure of hybrid composites, e.g. spatial arrangement of fibres, by optical microscopy, X-ray tomography, and image analysis.
  • to measure the mechanical properties of hybrid composites. Focus on static tension and compression, but dynamic testing, i.e. fatigue, will also be investigated.
  • to establish analytical micromechanical models for the relation between volumetric composition, microstructure and mechanical properties of hybrid composites. Examples of models are volumetric interaction models, modified rule of mixtures models for stiffness and strength, and shear lag models.
  • to compare model predictions with experimental data, and in this way, the existence of potential positive (and negative) hybrid effects will be evaluated.
The expected results of the work are:
  • establishment of experimental procedure for manufacturing of hybrid composites with controlled microstructure.
  • improved method for accurate measurements of the volumetric composition in hybrid composites.
  • establishment of image analysis based procedure for quantifying the microstructural arrangement of fibres in hybrid composites.
  • establishment of micromechanical models for predicting mechanical properties of hybrid composites.
  • establishment of a reliable experimental and modelling methodology for assessing the existence of hybrid effects in hybrid composites.
  • recommendations to industry for selection of fibre types and microstructure in hybrid composites for tailor-made mechanical performance.
During the the PhD project, two secondments are planned:
  • 3 months to Budapest University of Technology and Economics (Hungary) - to study the effect of microstructural design on the expected mechanical response of interlayer hybrid composite configurations.
  • 1 month to Fiberline Composites (Denmark) - to gain an industrial perspective on fibre-hybrid composites.
During the PhD project, the researcher will:
  • participate in the dedicated training programme organised by HyFiSyn (including technical, communication, career management and business skills), and in bi-annual project meetings.
  • write scientific papers for publication in top-level journals in materials science/mechanics.
  • present his/her research in project meetings, international conferences and outreach events.
  • work in close collaboration with supervisors, while being the driving force for his/her own PhD.
The work requires a strong background in one or more of the disciplines of materials sciences, manufacturing technology, and solid mechanics. The project will include both experimental and modelling research.

The post is supported by an allowance provided by the European Commission. Candidates must fulfil two eligibility criteria for this award:
  1. not residing in Denmark for at least 24 months in the last 3 years, and
  2. having no more than 4 years of research experience (working as researcher after obtaining master’s degree).
Candidates should have a master's degree in engineering or a similar degree with an academic level equivalent to the master's degree in engineering.

Approval and Enrolment
The candidate will be subjected to academic approval at DTU. For information about the general requirements for enrolment and the general planning of PhD scholarship studies at DTU, please see the DTU PhD guide.

Salary and appointment terms
The appointment will be based on the collective agreement with the Danish Confederation of Professional Associations. The allowance will be agreed with the relevant union. The period of employment is 3 years.

Your primary workplace will be at the Department of Wind Energy, DTU Risø campus.

You can read more about career paths at DTU here.

Further information
For further details about this specific position, please contact Senior Scientist Bo Madsen (, Section of Composites and Materials Mechanics, Department of Wind Energy, DTU.

Please submit your online application no later than 8 August 2018 (local time). Apply online at If you have any problem uploading large files, then please send them in a separate email to the project coordinator (

Applications must be submitted as one PDF file containing all materials to be given consideration. The file must include:
  • A letter motivating the application (cover letter)
  • Curriculum vitae
  • Grade transcripts and BSc/MSc diploma
  • 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 before having received it.

All interested candidates irrespective of age, gender, race, disability, religion or ethnic background are encouraged to apply.

DTU is a technical university providing internationally leading research, education, innovation and scientific advice. Our staff of 6,000 advance science and technology to create innovative solutions that meet the demands of society, and our 11,200 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.