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Vacature Technische Universiteit Eindhoven (TU/e) - PhDMicromechanical modelling of anisotropy in oriented semi-crystalline polymers

Specificaties - (uitleg)

Locatie Eindhoven
FunctietypesPromotieplaatsen
Wetenschappelijke disciplineTechniek
Uren 38,0 uren per week
Werk-/denkniveauUniversitair
Vacaturenummer V35.3215
Vertalingen
About employer Technische Universiteit Eindhoven (TU/e)
Short link www.academictransfer.com/45375

Solliciteer binnen 70 dagen op deze vacature

Functiebeschrijving

The PhD student position is available in the Polymer Technology group, and will be supervised by Dr. Hans van Dommelen, Prof. Leon Govaert, and Prof. Gerrit Peters.

Section description

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 PhD project, tasks

For a polymer material, the yield behaviour and the mode and time-scales of failure are strongly influenced by the molecular weight distribution of the polymer, the macromolecular orientation and the thermal history, i.e. factors that are directly connected to processing conditions. The latter is particularly true for semicrystalline polymers in which structural features, such as the degree of crystallinity and crystal type, size and orientation strongly influence their mechanical properties. During processing, a material is subjected to conditions that often result in an oriented microstructure, leading to anisotropic properties. To improve product performance, a fundamental and quantitative understanding of how anisotropic properties, including yield and failure kinetics, depend on the (oriented) structure is required.

In this project, a quantitative structure-property relationship will be developed for flow-oriented semicrystalline polymers, in particular polypropylene (PP), in terms of the fully anisotropic yield kinetics and the underlying oriented macromolecular structure.  This will involve the characterization of the slip kinetics for the individual slip systems and their effect on macroscopically anisotropic yield kinetics as well as the behaviour of the oriented amorphous phase. This way, a scale transition between the physical mechanisms of deformation and the macromechanical performance of oriented semicrystalline polymers is obtained.

Functie-eisen

Talented, enthusiastic candidates with excellent analytical and communication skills holding a university degree (MSc) in Mechanical Engineering, Physics, Materials Science or Applied Mathematics are encouraged to apply. A strong interest in mechanics of materials is required. Experience in multi-scale modelling, micromechanics, and experimental mechanics are of benefit.

Arbeidsvoorwaarden

We offer:
  • A challenging job at a dynamic and ambitious University and in an enthusiastic team.
  • An appointment (1 fte) as a PhD-student for four years, starting date: as soon as possible.
  • Gross monthly salaries are in accordance with the Collective Labour Agreement of the Dutch Universities (CAO NU), increasing from € 2222 per month initially, to € 2840 in the fourth year.
  • An attractive package of fringe benefits, including excellent work facilities, end of the year allowance and sport facilities.
  • Additionele informatie

    More information about this PhD position can be obtained from Dr. Hans van Dommelen (j.a.w.v.dommelen@tue.nl).

    Application
    Application documents (in PDF format) must contain: letter of motivation, detailed curriculum vitae including photograph, transcripts of BSc and MSc degrees, and contact information of two potential referees.

    Deadline
    As soon as possible. The vacancy is open until a suitable candidate has been found.
    bewaar

    Specificaties - (uitleg)

    Locatie Eindhoven
    FunctietypesPromotieplaatsen
    Wetenschappelijke disciplineTechniek
    Uren 38,0 uren per week
    Werk-/denkniveauUniversitair
    Vacaturenummer V35.3215
    Vertalingen
    About employer Technische Universiteit Eindhoven (TU/e)
    Short link www.academictransfer.com/45375

    Solliciteer binnen 70 dagen op deze vacature

    Functiebeschrijving

    The PhD student position is available in the Polymer Technology group, and will be supervised by Dr. Hans van Dommelen, Prof. Leon Govaert, and Prof. Gerrit Peters.

    Section description

    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 PhD project, tasks

    For a polymer material, the yield behaviour and the mode and time-scales of failure are strongly influenced by the molecular weight distribution of the polymer, the macromolecular orientation and the thermal history, i.e. factors that are directly connected to processing conditions. The latter is particularly true for semicrystalline polymers in which structural features, such as the degree of crystallinity and crystal type, size and orientation strongly influence their mechanical properties. During processing, a material is subjected to conditions that often result in an oriented microstructure, leading to anisotropic properties. To improve product performance, a fundamental and quantitative understanding of how anisotropic properties, including yield and failure kinetics, depend on the (oriented) structure is required.

    In this project, a quantitative structure-property relationship will be developed for flow-oriented semicrystalline polymers, in particular polypropylene (PP), in terms of the fully anisotropic yield kinetics and the underlying oriented macromolecular structure.  This will involve the characterization of the slip kinetics for the individual slip systems and their effect on macroscopically anisotropic yield kinetics as well as the behaviour of the oriented amorphous phase. This way, a scale transition between the physical mechanisms of deformation and the macromechanical performance of oriented semicrystalline polymers is obtained.

    Functie-eisen

    Talented, enthusiastic candidates with excellent analytical and communication skills holding a university degree (MSc) in Mechanical Engineering, Physics, Materials Science or Applied Mathematics are encouraged to apply. A strong interest in mechanics of materials is required. Experience in multi-scale modelling, micromechanics, and experimental mechanics are of benefit.

    Arbeidsvoorwaarden

    We offer:
  • A challenging job at a dynamic and ambitious University and in an enthusiastic team.
  • An appointment (1 fte) as a PhD-student for four years, starting date: as soon as possible.
  • Gross monthly salaries are in accordance with the Collective Labour Agreement of the Dutch Universities (CAO NU), increasing from € 2222 per month initially, to € 2840 in the fourth year.
  • An attractive package of fringe benefits, including excellent work facilities, end of the year allowance and sport facilities.
  • Additionele informatie

    More information about this PhD position can be obtained from Dr. Hans van Dommelen (j.a.w.v.dommelen@tue.nl).

    Application
    Application documents (in PDF format) must contain: letter of motivation, detailed curriculum vitae including photograph, transcripts of BSc and MSc degrees, and contact information of two potential referees.

    Deadline
    As soon as possible. The vacancy is open until a suitable candidate has been found.

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    Technische Universiteit Eindhoven (TU/e)