UPLIFT YOUR FUTURE

11,000 People. 16 Locations worldwide. One in three planes files with our Technology.
Even more economical, lower in emissions and quieter. We shape the future of Aviation. The only thing missing: You.

Our team in Munich is searching for you as:

Writer master thesis: Accelerated Crack Propagation Calculations with CRACKTRACER3D (m/f/d)

Aircraft engines are subjected to several environmental influences. For instance, the occurrence of foreign object damage at airfoils is unavoidable during operation. To take this into account a damage tolerant design is necessary. Part of the substantiation of damage tolerance requires the use of 3D crack propagation analyses. At MTU this is done by a finite element method based in-house tool called CRACKTRACER3D.    

To determine the crack propagation size and direction the K-values have to be calculated. To this end the actual crack shape is inserted into the structure, a finite element calculation is performed with CalculiX and the K-factors are determined based on the stress singularity ahead of the crack front. These K-factors and the crack propagation direction are kept constant during a by the user predefined crack propagation increment. Subsequently, a new crack front is determined and the procedure is repeated until failure or some other criterion.

Since the K-factors are kept constant during the crack propagation increment the increment size must be rather small, leading to long calculation times. Instead, one could extrapolate the K-factors based on the actual crack length, or use a kind of predictor-corrector strategy in order to increase the increment size and decrease the computational times.

TASKS

  • Getting acquainted with the present procedure in CRACKTRACER3D. Analyzing and becoming familiar with the FORTRAN and C code of the postprocessor of CRACKTRACER3D
  • Studying the literature and identifying the most promising procedures to increase  the crack propagation increment without destabilizing the calculation
  • Implementing these procedures and checking the performance and accuracy on specimens with a simple geometry
  • Performing tests on real engine components

REQUIREMENTS

  • Major in engineering, mathematics or physics
  • Experience with the finite element method
  • Good knowledge in mechanics, especially fracture mechanics
  • Programming experience in FORTRAN, C, C++, Python or related languages
  • Willing to get familiar with an existing code
  • Duration: 6 months

OUR OFFER

  • Insights into practical work in aviation as an innovative, high-tech industry
  • Exciting jobs that carry responsibility and are performed in an atmosphere of team spirit
  • A personally assigned contact and individual support services
  • Flexible working hours and compensatory time off
  • Networking opportunities

READY?

Give your career a boost and send us your complete application (Letter of Motivation, CV, Transcript of Records, High School Diploma).

We look forward to getting to know you!