Daniel Fochler

M.Sc.

Academic employee
Institute for Aircraft Propulsion Systems

Contact

+49 711 685 69385
 +49 711 685 63505
Business card (VCF)

Pfaffenwaldring 6
70569 Stuttgart
Germany
Room: 1/29

Subject

In aerospace engineering, structural components are frequently subjected to severe vibrational loading while being required to meet the most stringent demands on weight efficiency and reliability.
For a predictive assessment of vibration amplitudes, the microscopic contact interactions at the joints between components are of key importance, as the dissipation of vibrational energy is primarily governed by frictional effects at these interfaces.
However, an numerical representation of the real contact geometry across all relevant length scales is typically infeasible using conventional methods due to its excessive computational effort.
To overcome this limitation, novel numerical multiscale approaches are being developed in our group, combining boundary element and finite element methodss.
For the experimental investigation of such contact phenomena and for the validation of the developed numerical methods, dedicated measurement instruments are required.
For this purpose, a novel device with globally unique characteristics has been designed, which enables the precise measurement of force–displacement relations in the micrometer range with highest accuracy.

Keywords:

- Nonlinear Structural Dynamics
- Development of advanced Measurement Systems
- Development of advanced Numerical Methods
- Contact Mechanics
- Boundary Element Method 
- Experimental Methods

Reviewed Journal Publications

  •  Lacayo, R., et al: Nonlinear modeling of structures with bolted joints: a comparison of two approaches based on a time-domain and frequency-domain solver. Mech. Syst. Signal Process, 2019, DOI: 10.1016/j.ymssp.2018.05.033
  • Fochler D. et al,  The Black Metal Tribometer: High-resolution measurement of normal load-indentation curves and partial slip hysteresis cycles, Tribology International, 2025, DOI: 10.1016/j.triboint.2025.110560
  • Bhattu A. et al, The role of vibration-induced settling on the normal and tangential forces within a jointed structure, Mechanical Systems and Signal Processing, 2025, DOI: 10.1016/j.ymssp.2025.112994 

Conference Publications

  • Fochler, Krack et al. 2025 @IMAC, "The Black Metal Tribometer: High-resolution measurement of normal load-indentation curves and partial slip hysteresis cycles" 
  • Balaji, Fochler, Krack,  2025 @IMAC,  "Epistemic Insights on Frictional hysteresis Models based on Micro-slip
     measurements under Single- and multi-harmonic Loading"
  • Fochler, Krack, @GfT Jahrestagung 2025, "The Black Metal Tribometer: Hochaufgelöstte Messungen von Kraft-Weg-Kurven im Normalkontakt und für Mikroschlupfhysteresezykel." 
Bachelor Luft- und Raumfahrttechnik

Luftfahrtantriebe und Turbomaschinen: Seminar zur Strukturmechanik 2021-heute

Master Luft- und Raumfahrttechnik 

Turbomaschinery Blade Vibrations: Begleitung des Seminars 2021-heute

  • Konzeptionierung und Auslegung einer Prüflingsaufnahme zur Schwingungscharakterisierung von zyklischsymmetrischen Strukturen
     Conception and dimensioning design of a test specimen fixtrue for dynamica characterizaiton of cyclic-symmetric structures    
    Masterarbeit, 2024, MTU Aero Engines und Universität Stuttgart
  • Entwicklung eines Multi-Skalen-Kontaktlösers basierend auf der Randelementemethode, 
    Development of a Multi-Scale-Contact-Solver based on the Boundary Element Method
    Masterarbeit, 2023
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