Exploiting Nonlinearities For Friction-Induced Vibrations Mitigation – funded by Regione Puglia
Title: Exploiting Nonlinearities For Friction-Induced Vibrations Mitigation
Acronym: ENOVIM
Starting date: 01/09/2021
Project duration: 2 years
Overall Grant: 38.149 €
CUP: D95F21000910002
Principal Investigator: Prof. Antonio Papangelo
e-mail: antonio.papangelo@poliba.it
Funding body: Regione Puglia (Avviso pubblico per l’attribuzione del contributo a progetti di ricerca scientifica innovativi di elevato standard internazionale (art. 22 della legge regionale 30 novembre 2019, n. 52) approvato con A.D. n. 89 del 10-02-2021 pubblicata nel BURP n. 25 del 18-02-2021.)
Description and results achieved:
The ENOVIM research project, financed by the Puglia Region, has set itself the objective of developing simplified models for the study of contact between components made of soft materials, for example polymers, plastics, silicones. These materials are called viscoelastic and have the peculiarity of effectively dissipating energy when they are subjected to loads that vary over time, making them ideal candidates in the development of systems designed to reduce or eliminate vibrations in mechanical components subject to external loads. For this reason, these materials are increasingly used in engineering with applications ranging from mechanics to aerospace and biomechanics. In particular, the project developed simplified models to simulate the behavior of bodies in contact with particular reference to the energy dissipation due to viscoelasticity and friction. The results obtained from the research project have been published in prestigious international journals [1-4].
The ENOVIM project demonstrated that the viscoelastic contribution is very important in determining the dissipative capacities of components made of polymeric material (typically in aerospace applications: bumpers, stoppers, dampers) and cannot be neglected. Other sources of dissipation to take into account in the design are surface adhesion.
The results obtained are of interest in the mechanical, biomechanical, aeronautical and aerospace fields, therefore they are of interest for the industrial realities present in the territory of Regione Puglia, in particular for the Puglia Aerospace District which brings together more than 57 companies, 8 research centers and universities, also involving the aerospace tourism sector in the near future (Grottaglie spaceport). Furthermore, the ENOVIM research project has strengthened the skills in the field of simulation of mechanical systems of the Polytechnic of Bari and in particular of the Department of Mathematical Mechanics and Management. The numerical tools developed can in fact be exploited for the design of mechanical systems where friction interfaces play a key role (e.g. turbine blades, gears, dampers, bumpers), confirming the quality of the results achieved by the ENOVIM project.
References:
[1] Papangelo, A., & Ciavarella, M. (2022). Viscoelastic dissipation in repeated normal indentation of an Hertzian profile. International journal of solids and structures, 236, 111362.
[2] Ciavarella, M., Papangelo, A., & McMeeking, R. (2022). Transient and steady state viscoelastic crack propagation in a double cantilever beam specimen. International journal of mechanical sciences, 229, 107510.
[3] Papangelo, A., & Ciavarella, M. (2023). Detachment of a rigid flat punch from a viscoelastic material. Tribology letters, 71(2), 48.
[4] Forsbach, F., Heß, M., & Papangelo, A. (2023). A two-scale FEM-BAM approach for fingerpad friction under electroadhesion. Frontiers in mechanical engineering, 8, 1074393.
