PORTALE DELLA DIDATTICA

Ricerca CERCA
  KEYWORD

RANDOM FATIGUE DAMAGE MODEL of MATERIALS for AEROSPACE and AUTOMOTIVE APPLICATIONS

Reference persons CRISTIANA DELPRETE, RAFFAELLA SESANA

Research Groups 20-Industrial Systems Engineering and Design

Thesis type ANALYTICAL AND EXPERIMENTAL, NUMERICAL AND EXPERIMENTAL

Description Aim of the work is to identify a damage model for materials subjected to random fatigue, not based on stress but on vibrational parameters (in particular damping) as the number of cycles progresses. The activity include an experimental part and also a part of analytical-numerical modeling with FE.
Random fatigue characterization is foreseen by means of a dedicated dedicated test bench. The activity is already underway, the test procedure is defined and the specimens are available. This involves completing the tests and analyzing the experimental data, applying the literature life estimation models for random fatigue, comparing the results and validating the life estimation model and eventually optimizing it.
The analytical-numerical part involves the development of a constitutive model able to represent the cyclic behavior of the material, after verifying the possibility that the literature models developed for steel/cast iron can be also applicable for Aluminum alloys. Completion of a dedicated damage model (already available but to be improved and calibrated).
What to do: Update the bibliographic analysis of the part related to random fatigue (starting from what is already available). Develop the experimental tests, taking care of the whole part related to the measurements and the analysis of the fracture surfaces. Develop a mathematical model starting from the analysis of the experimental results.
Software: Matlab for modeling and a commercial FEM code (linear elastic problem) of which we are licensed in polytechnic (Nastran, Ansys, Abaqus…) for FE analysis.


Deadline 28/03/2021      PROPONI LA TUA CANDIDATURA




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