ESR 6: Multiscale modeling of fracture processes in injection molded SFRPs

  • Application deadline: 31/08/2021 23:00 CET Brussels
  • Offer starting date: Before 01/10/2021
  • Researcher profile: First Stage Researcher (R1)
  • Type of contract: Temporary
  • Job status: Full-time
  • Hours per week: 40
  • Secondments: 6 months at ETH Zurich (Switzerland) & 4 months at Sorbonne Université Paris (France)

Contract signing and incorporation dates are indicative and have yet to be defined.

  • Recruiting institutionRobert Bosch GmbH»
  • City, Country: Renningen, Germany
  • Organization type: Large Company
  • Department: Corporate Sector Research and Advance Engineering - Applied Material and Manufacturing Technologies for Metals and Polymers
  • Main supervisor: Dr. Fabian Welschinger
  • Research Field:
    • Engineering > Mechanical engineering
Project Description


Components made of Short Fiber Reinforced Plastics (SFRP) are typically manufactured via injection molding. Hereby, the resulting local microstructural configuration of the composite, i.e. the spatial arrangement of the fibers, highly influences the deformation and failure behavior of the macroscopic component.

Later in the application, products made of these composites are exposed to harsh environments and severe operational loads. Aiming at the development of products with high reliability requirements in a time- and cost-efficient manner, simulation methods with high accuracy predictions and efficient adaption routines are becoming increasingly important.

To achieve this, robust multiscaling techniques must be established that contain elements of virtual material testing where a large portion of the required experiments are transferred from the lab to the computer. This requires an explicit modeling of all relevant deformation and failure mechanisms on the microscopic scale using Representative Volume Elements (RVEs) in combination with numerically efficient Fast Fourier Transformation (FFT) solvers. Aiming at a data-driven multiscaling approach, the results of these microstructural simulations are transferred to a database which is the basis for a precise anisotropic virtual analysis of plastic components on the macroscopic scale. With a view to fracture mechanical processes in SFRP components, this ESR project is addressing the extension of existing data-driven multiscaling approaches for SFRPs towards anisotropic fracture using the phase field (PF) approach.

The first objective of this ESR project is the theoretical formulation and numerical implementation of this PF-model into a commercial FEM package. The second objective is the calibration and validation of the developed model with experimental results based on macroscopic boundary value problems with different complexity ranging from plain samples to product-like demonstrator components.

Doctoral program

ESR-6 will be enrolled as doctoral student in the Department of Mechanical and Process Engineering at ETH Zürich, Switzerland.


6 months at ETH Zürich (Switzerland) and 4 months at Sorbonne Université Paris (France).

Additional Information


A full-time fixed-term contract is offered. Marie Curie ITNs provide competitive financial support to the ESR including: a competitive monthly living and mobility allowance and salary, coverage of the expenses related to the participation of the ESR in research and training activities (contribution to research-related costs, meetings, conference attendance, training actions, etc.). The recruited researchers will have a regular contract with the same rights and obligations as any other staff member of the institution.

Eligibility criteria

Applicants must at the time of recruitment:

  1. Be in the first four years (full-time equivalent) of their research careers. The four years start to count from the date when a researcher obtained the degree (e.g. Master’s degree) which would formally entitle him/her to embark on a doctorate.
  2. Candidates could be of any nationality but have not resided in the host country for more than 12 months in the last 3 years.
  3. Have not been awarded a doctoral degree.

Selection process

Applicants are evaluated by a selection committee on the basis of past academic performance (grades) and background, scientific relevance and aptitude to research, and any other additional pertinent data submitted in the application (such as scientific publications, if any).

The candidates that pass the initial assessment of the applications will be invited for an interview with the selection committee, either in person at the campus, or via standard internet videoconference. Equal opportunities are ensured to all candidates throughout the evaluation process.

EURAXESS offer ID: 668704

ESR6 - PhD Student Position within EU MSCA-ITN-ETN NewFrac


Offer requirements

  • Required Education Level: Engineering - Master Degree or equivalent
  • Required Languages: English - Excellent

Skills / Qualifications

  • Master’s degree in Mechanical/Aeronautical/Material/Civil Engineering/ Physics/ Applied Mathematics, and related disciplines, earned before September 30, 2021.
  • Excellent undergraduated and Master’s degree grades.
  • High level of written and spoken English.
  • Teamwork ability.

Specific Requirements

  • Previous experience in the development and application of Finite Element Method and at least one programming language will be appreciated.
All PhD positions

ESR project

Host Institution


IRP/ESR 1: Total energy minimization with stress conditions for mixed mode fracture in anisotropic heterogeneous materials and structures

Universidad de Sevilla (Spain)

IRP/ESR 2: Toughening composites by micro and meso structural optimization

Universidad de Sevilla (Spain)

IRP/ESR 3: Fracture analysis of advanced layered ceramics

Sorbonne Université (France)

IRP/ESR 4: Fracture of LFRP ultra-thin ply laminates in aeronautical applications

Universidade do Porto (Portugal) 

IRP/ESR 5: Nucleation and propagation of compressive cracks

Sorbonne Université (France)

IRP/ESR 6: Multiscale modeling of fracture processes in injection molded SFRPs

Robert Bosch GmbH (Germany)

IRP/ESR 7: Debonding of the reinforcement in LFRP externally strengthened curved beams

Politecnico di Torino (Italy)

IRP/ESR 8: Fracture in biological anisotropic hard tissues (human bones)

Tel-Aviv University (Israel)

IRP/ESR 9: Multi-field and multi-scale modeling of fracture for renewable energy applications

IMT School for Advanced Studies Lucca (Italy)

IRP/ESR 10: PF modeling of fracture in the human femur

Eidgenoessische Technische Hochschule Zürich (Switzerland)

IRP/ESR 11: Analysis of the failure mechanisms associated to the unfolding failure in CFRP profiles

Fundación Investigación, Desarrollo y Aplicación de Materiales Compuestos (Spain)

IRP/ESR 12: Fracture in fibre-reinforced thermoplastics (FRTPs) across the scales

Universidade do Porto (Portugal)

IRP/ESR 13: Phase Field and Finite Fracture Mechanics for dynamic crack propagation and delamination in brittle materials and composites

Politecnico di Torino (Italy)

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European Commission under a Marie Skłodowska-Curie Actions

Funded by the European Commission under a Marie Skłodowska-Curie Actions. Grant Agreement n° 861061