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Student paper

Research into the load-bearing capacity of technical thermoplastics after quasi-static pre-damage

Research laboratory or project work

In the Fatigue Strength and Vibroacoustics working group, we analyse the influence of dynamic stresses on technical thermoplastics. We test the material using state-of-the-art equipment and carry out structural calculations based on the results.
Stuwi-der Tragfähigkeit technischer Thermoplaste nach quasistatischer Vorschädigung© IKV
Measurement of the deformation during the tensile test using video extensometry. The constriction of the test area due to the plastic deformation can be recognised

Thanks to their excellent processing properties, engineering thermoplastics are increasingly being used in modern lightweight construction. The mechanical properties can be further optimized with short-fiber reinforcement, so that metal is increasingly being substituted in semi-structural applications.

The classic component design in automotive or aerospace applications is typically carried out using safety factors in the linear-elastic material range. However, plastic deformations can occur due to overloading, which affect the load-bearing capacity. The residual strength after quasi-static pre-damage is therefore tested and evaluated for resource-saving dimensioning.

The work is related to this research project

In the working group Fatigue Strength and Vibroacoustics we investigate the influence of dynamic stresses on technical thermoplastics. We test the material using state-of-the-art equipment and carry out structural calculations based on the results.

These could be your tasks:

Production of test specimens using the injection molding process Statistical test planning
Performance of tensile tests to induce pre-damage and determine residual stiffness and strength Production of test specimens using the injection molding process
Systematic analysis of the influences of plastic deformation on the residual stiffness and strength Performance of tensile tests to induce pre-damage and to determine the residual stiffness and strength
Systematic analysis of the influence of plastic deformation on residual stiffness and strength

These are your benefits:

  • Learn how to work scientifically in a motivated team under intensive supervision
  • Learn how to systematically collect and analyze data
  • Preparation for your Bachelor’s/Master’s thesis
  • Immediate start and fast processing are possible
  • Possibility to continue working in the working group after work

Your profile

  • Technical or scientific studies
  • Interest in experimental work
  • Analytical thinking
  • Preferred study programs:
    • Mechanical engineering / industrial engineering, specialising in mechanical engineering
    • Automation technology
    • General mechanical engineering
    • Materials science
    • Industrial engineering specializing in materials and process engineering
    • Applied Polymer Science