Dynamic metamaterials based on local resonance constitute a relatively new emerging class of metamaterials targeting manipulation of mechanical waves in subwavelength regime. These metamaterials can provide novel paths to the solution of a number of challenging problems in wave mitigation and control by going beyond the limits of the conventional solutions used nowadays. One of the potential application areas of direct societal importance is noise insulation. To this aim, the metafoam concept has been recently proposed in our group. Metafoams are based on the combination of the working principle of conventional acoustic foams, relying on visco-thermal energy dissipation due to the foam cell structure, combined with the local resonance phenomenon, originating from implanted small masses (smaller than the cell structure). While the former mechanism is effective in the mid- and high-frequency acoustic regimes, the latter can significantly enhance the low-frequency sound insulation. The anticipated advantage of metafoams is that they might be compatible with mass production techniques based on existing foaming technologies, ultimately leading to an economically efficient solution for noise protection.
The present PhD project will focus on further development of the metafoam concept with the aim of bringing it to the next technology readiness level. First part of the project will be dedicated to numerical micro-mechanical and multi-scale analysis of the acoustic performance of the metafoams for varying material and geometrical parameters. The acoustic wave attenuation in a finite size metafoam panels, as opposed to infinite domains, will be studied using the computational homogenization approach. Guided by the numerical simulations, the second part of the project will concern with manufacturing acoustic metafoam prototype samples and execution of acoustic measurements to assess the metafoam performance.
In this project, collaboration with companies will exist, which will offer their expertise to aid the project, as well as with other PhD and PostDoc researchers working on related projects.
The applicant should have excellent analytical, numerical and experimental skills and hold a university degree (MSc) in Mechanical Engineering, Applied Mathematics, Physics or similar. A strong interest in multi-scale material modelling and micromechanics is required. Experience with computational and/or experimental acoustics is preferred.
More information about this PhD position can be obtained from Dr. Varvara Kouznetsova firstname.lastname@example.org, https://www.tue.nl/en/research/researchers/varvara-kouznetsova/.
Application documents (in PDF format) must contain letter of motivation, detailed curriculum vitae, transcripts of BSc and MSc degrees and the names and e-mail addresses of at least 3 potential referees.