3 dagen geleden - Radboud Universiteit (RU) - Nijmegen
PhD position on reliability-based thermo-mechanical simulations of thermoplastic composite manufacturing
Simulation models will be developed for reliability-based strength predictions of thermoplastic joints. The major modelling challenges to be addressed are: …
- Mekelweg, Delft, Zuid-Holland
- Tijdelijk contract / Tijdelijke opdracht
- Uren per week:
- 38 - 40 uur
- € 2395 - € 3061 per maand
Simulation models will be developed for reliability-based strength predictions of thermoplastic joints. The major modelling challenges to be addressed are: two-timescale phenomena, vast range of strain-rates and temperatures, friction- and viscoelastic-induced heating, free-surface viscoplastic flow, variable crystallinity, diffusion and heat dissipation that depends on the composite layout. Two approaches are proposed for modelling free-surface viscoplastic flow, namely Arbitrary Lagrangean-Eulerean (ALE) and the Material Point Method (MPM) coupled with finite elements.
We propose to do the load application from higher-frequency sources inexpensively by means of modal superposition, but the candidate will evaluate the feasibility of this approach, and compare with other suitable methods.
The calculated homogenized heat generation due to adiabatic heating at high strain rates, and due to friction, will serve as an input to the thermomechanical models. The temperature-, strain-rate- and crystalline-dependent material properties of the thermoplastic matrix will be obtained by another researcher within the project, with whom the candidate is expected to collaborate closely.
Diverse manufacturing simulations are expected to be performed, and among the mandatory outcomes are the material meso-structure and corresponding mechanical properties, including their variability with respect to processing parameters.
The expected starting date is January/2022.
We are looking for an enthusiastic PhD candidate, with excellent qualifications and with a Master of Science degree, or equivalent, in aerospace engineering, mechanical engineering, or a related subject. For this position, we require: 1) demonstrated affinity with dynamic simulations including progressive damage for composite structures; 2) experience implementing UMAT and/or VUMAT subroutines; 3) experience working in a multidisciplinary team; 4) demonstrated excellent programming skills; 5) very good spoken and excellent written English. It is also highly desirable to have experience with 6) multi-scale simulations; 7) simulation of manufacturing processes; 8) constitutive models for thermoplastic materials.
TU Delft offers PhD-candidates a 4-year contract, with an official go/no go progress assessment after one year. Salary and benefits are in accordance with the Collective Labour Agreement for Dutch Universities, increasing from € 2395 per month in the first year to € 3061 in the fourth year. As a PhD candidate you will be enrolled in the TU Delft Graduate School. The TU Delft Graduate School provides an inspiring research environment with an excellent team of supervisors, academic staff and a mentor. The Doctoral Education Programme is aimed at developing your transferable, discipline-related and research skills.
The TU Delft offers a customisable compensation package, discounts on health insurance and sport memberships, and a monthly work costs contribution. Flexible work schedules can be arranged. For international applicants we offer the Coming to Delft Service and Partner Career Advice to assist you with your relocation.
For information about this vacancy, you can contact Dr.-Ing. Saullo G. P. Castro, Assistant Professor,
email: email@example.com, tel: +31 15 27 87367.
We look forward for your applications by 12 September 2021, containing: 1) a motivation letter briefly including your approach to this project; 2) an updated CV; 3) two reference letters with contact email and contact phone.