Postdoc Predictive modelling of short-fibre reinforced polymers (V35.2796)
Postdoc Predictive modelling of short-fibre reinforced polymers
The research activities of the Polymer Technology group concentrate on the fundamental understanding of various macroscopic problems in the processing and use of polymer components and products. An important challenge is the establishment of a direct link from processing conditions to mechanical performance; a task that requires the combination of a number of vastly different disciplines, including elements of computational rheology, solid-state rheology, and polymer physics and mechanics. The group has a unique research infrastructure, both from an experimental and computational perspective. The Mechanical Testing Lab offers a large capacity of testing equipment for short-term (impact) and long-term testing (static and cyclic fatigue).
Aim of the PD project, tasks
Due to the influence of fibre orientation, short-fibre thermoplastic composites typically display a pronounced anisotropy in their mechanical response. An additional complexity is that variations in processing conditions over the mould give rise to spatial variation of flow-]induced fibre orientation and the related mechanical response. Current state of the art of mechanical analysis of such systems is a micro-macro translation based on mean-field approaches that are unable to deal with the pronounced plastic strain localizations that are induced by the fibres. Additionally, the constitutive models applied are generally oversimplified and unable to capture neither the actual stress-]strain response of the thermoplastic resin nor that of the composite.
We recently developed a constitutive relation that realistically captures the anisotropic mechanical response of short-fiber reinforced systems, including time-dependent, plasticity-controlled failure. The PD will implement this model, and apply it to predict the mechanical performance of demonstrator products, which will be chosen in collaboration with our industrial partners. The mechanical characterization and validation experiments will be performed within a parallel PhD project. Efforts to develop additional tools that allow to determine the input parameters directly from information on fibre-orientation obtained from process simulation software (e.g. Moldflow) is currently under development within our group. In combination with the implementation planned here, a powerful design tool will be obtained.
Talented, enthusiastic candidates with excellent analytical and communication skills holding a PhD-degree in computational mechanics or constitutive modelling of polymers.
Conditions of employment
- A challenging job at a dynamic and ambitious University and in an enthusiastic team.
- An appointment (1 fte) for two years, starting date: as soon as possible.
- Gross monthly salaries are in accordance with the Collective Labour Agreement of the Dutch Universities (CAO NU), with an indicative starting salary of € 3068 per month.
- An attractive package of fringe benefits, including excellent work facilities, end of the year allowance and sport facilities.
Information and application
Application documents (in PDF format) must contain: letter of motivation, detailed curriculum vitae including photograph, transcript of PhD degree, and contact information of two potential referees. Please use the button "apply now" on this page.
As soon as possible. The vacancy is open until a suitable candidate has been found.