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Faculty of Engineering
Department of Structural Engineering

PhD position within modelling and optimization of sacrificial claddings exposed to blast loading (IV-12/17)


The Norwegian Research Council has defined CASA (Centre for Advanced Structural Analysis) hosted by SIMLab, Department of Structural Engineering, NTNU, in close cooperation with the Department of Material Science and Engineering and the Department of Physics and with SINTEF as a research partner, as a Centre for Research-based Innovation (SFI). The objective of the SFI scheme is to strengthen Norwegian research groups that work in close collaboration with partners from industry and public enterprises in order to support long-term research that promotes innovation and value creation. The industrial partners in the Centre are Audi, Benteler Aluminium Systems, BMW, DNV-GL, Gassco, Honda, Hydro Aluminium, Norwegian Ministry of Local Government and Modernisation, Norwegian Defence Estates Agency, Norwegian National Security Authority, Norwegian Public Roads Administration, Renault, Sapa, Statoil and Toyota. The main objective with the Centre is to provide a research and technology platform for the creation and development of smart, cost effective, safe and environmentally friendly structures and products through multi-scale testing, modelling and simulation.

The topic of the vacant PhD-position is modelling and optimization of sacrificial claddings exposed to blast loading. When a building facade is hit by an intense blast wave caused by an explosion, it is important to reduce the consequences from such loading scenarios. As a mean in the protection of load bearing structures, sandwich designs (which often consist of cores encapsulated by face sheets) are found to be efficient energy absorbents in the event of high-energy accidents and targeted attacks. As the sandwich structure deforms, energy is dissipated within the sandwich layers, thus reducing the forces transferred to critical components. It is important to understand the properties of the various sandwich layers and the interaction between them in order to optimise the design of such energy absorbing components. The design of the core layer may vary in complexity from stochastic to more homogenous structures. This produces a range of possible combinations in the composition of the sandwich layer. Whilst there exist analytical and finite element based approaches to predicting the optimal composition of specific layer designs in sandwich solutions in the open literature, a more generic approach to optimisation of both the geometry and material should be examined.

This PhD-project will start with a critical and thorough review of the literature on the behaviour, properties and optimisation of sandwich structures and cellular materials. Then, experimental methods for material and component tests will be established and tests will be performed. These tests will create the foundation for the development of optimisation techniques for multilayer compression structures. The optimisation techniques will be compiled in an application tool which will serve as a basis for further development of numerical models of various generic protective structure designs. Studies will be conducted where optimised numerical models of selected designs are validated against corresponding experimental component tests carried out under controlled conditions in a shock-tube facility. Full-scale tests under realistic conditions will also be done for validation purposes.

The successful applicants are motivated and ambitious students with excellent grades and have background in mechanics, materials engineering or similar. The PhD applicant is expected to carry out both theoretical and experimental work. The position is for 4 years with 25 % duties at NTNU. It is also a premise for the position that the PhD candidate will spend time both at SIMLab, NTNU, and at Department of Engineering, University of Cambridge. The applicant should be fluent in English (spoken and written), familiar with giving presentations and lectures in English and also interested in learning Norwegian.

PhD Candidates are remunerated in code 1017, and are normally remunerated at gross NOK 430,200 before tax. There will be a 2 % deduction to the Norwegian Public Service Pension Fund from gross wage.

Engagement as a PhD Candidate is done in accordance with “Regulation concerning terms and conditions of employment for the posts of post-doctoral research fellow, research fellow, research assistant and resident”, given by the Ministry of Education and Research of 19.07.2010. The goal of the positions is to obtain a PhD degree. Applicants will engage in an organized PhD training program, and appointment requires approval of the applicants plan for a PhD study within three months from the date of commencement.

The position is of 4 years’ duration, of which 25% duty work.

For further information about the position, please contact Prof. Tore Børvik, email:tore.borvik@ntnu.no or Professor Magnus Langseth, email: magnus.langeth@ntnu.no

See http://www.ntnu.edu/ivt/phd for more information.

The engagement is to be made in accordance with the regulations in force concerning State Employees and Civil Servants. The positions adhere to the Norwegian Government's policy of balanced ethnicity, age and gender. Women are encouraged to apply.

The application
The application must contain information of educational background and work experience. Certified copies of transcripts and reference letters should be enclosed. Applications with CV, grade transcripts and other enclosures should be submitted via this webpage at www.jobbnorge.no. Mark the application with IV12/17.
Application deadline is 1.March 2017

According to the new Freedom of Information Act, information concerning the applicant may be made public even if the applicant has requested not to be included in the list of applicants.

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