Dynamics of quasi-periodic elastic structures

• Grant number: 20/07703-0
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Effective date (Start): July 01, 2020
• Effective date (End): October 31, 2020
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: José Roberto de França Arruda
• Grantee: Luis Gustavo Giacon Villani
• Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 18/15894-0 - Periodic structure design and optimization for enhanced vibroacoustic performance: ENVIBRO, AP.TEM

Abstract

The use of quasi-periodic structures and metamaterials to control wave propagation has attracted the attention of the scientific community for the last decades. A large number of these structures are constructed using additive manufacturing methods, like 3D printing, which leads to a large presence of uncertainties, mainly in the variation of the materials' properties throughout the specimens. Therefore, the analysis of uncertainties in the prediction of quasi-periodic structures dynamic behavior becomes very important to guarantee that these structures can perform their tasks with reliability. In this sense, this research proposal aims to analyze the influence of the presence of uncertainties in the performance of topological modes in quasi-periodic structures, proposing new stochastic models to study the effects of parameter variation in their behavior. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

LIMA, VINICIUS D.; VILLANI, LUIS G. G.; CAMINO, JUAN F.; ARRUDA, JOSE R. F.. Band gap optimization of one-dimension elastic waveguides using spatial Fourier plane wave expansion coefficients. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF ME, v. 235, n. 14, SI, JAN 2021. (18/15894-0, 20/07703-0)

BRAGHINI, DANILO; VILLANI, LUIS G. G.; ROSA, MATHEUS I. N.; ARRUDA, JOSE R. DE F.. Non-Hermitian elastic waveguides with piezoelectric feedback actuation: non-reciprocal bands and skin modes. JOURNAL OF PHYSICS D-APPLIED PHYSICS, v. 54, n. 28, JUL 15 2021. (19/20235-9, 18/15894-0, 20/07703-0)