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Internship

Implementation of material models in Abaqus to define damage in ceramic matrix composites

Starting date

1 March 2018

Duration of contract

6 Months

Remuneration

according to the German TVöD

Type of employment

Full-time

"Cutting-edge research requires excellent minds – particularly more females – at all levels. Launch your mission with us and send in your application now!" Prof. Pascale Ehrenfreund - Chair of the DLR Executive Board

Your mission:

In the department of ceramic composite structures at DLR (German Aerospace Center), Institute of Stuctures and Design, ceramic matrix composites (CMC) have been developed since the late 1980s. These materials exhibit damage tolerant fracture behavior, good thermal shock resistance and insensitivity towards cyclic fatigue. Moreover, oxide/oxide Ceramic Matrix Composites (CMCs) provide inherent oxidation stability when employed in high temperature applications. Several material models have been developed at the institute to model the damage behavior of this material class. The anisotropic nature of CMCs makes the task of model implementation in FEM Software even more challenging. Implementation and validation of such a damage model in ABAQUS will be focus of this work. These material models, when combined with failure criteria, are useful for the prediction of stress-strain curves of the material. Advanced approach has to be developed in order to use the damage model and predict the lifetime of CMCs.

The work will comprise:

  • understanding of Continuum Damage Mechanics through literature review
  • determination of parameters required for material model
  • implementation of damage models in a FORTRAN Subroutine (UMAT) which is compatible with ABAQUS
  • validation of results obtained from ABAQUS with help of test results
  • documentation of implementation-process of damage models (UMAT) in ABAQUS

Your qualifications:

  • student of Computational, Material or Aerospace Engineering
  • knowledge of mechanics of composite materials
  • knowledge of FEM Simulation (ABAQUS)
  • basic knowledge of continuum mechanics
  • basic knowledge of programming languages (eg. FORTRAN, Python)

Your benefits:

Look forward to a fulfilling job with an employer who appreciates your commitment and supports your personal and professional development. Our unique infrastructure offers you a working environment in which you have unparalled scope to develop your creative ideas and accomplish your professional objectives. Our human resources policy puts great value on a healthy work-life balance as well as equal opportunities for men and women. Individuals with disabilities will be given preferential consideration in the event their qualifications are equivalent to those of other candidates.

Technical contact

Neraj Jain
Institute of Structures and Design

Phone: +49 711 6862-8264

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Vacancy 13865

HR department Stuttgart

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DLR site Stuttgart

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DLR Institute of Structures and Design

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