Nonlinear stiffness characterization for applications on vibration isolation

• Grant number: 17/21221-6
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: December 01, 2017
• End date: November 30, 2018
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: Paulo José Paupitz Gonçalves
• Grantee: Fernanda Azevedo de Oliveira
• Host Institution: Faculdade de Engenharia (FE). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil

Abstract

This project proposes the study of a mechanical structure with its geometry characterized by a curve in piriform format. When the thinner part of the structure is clamped and a compression load is applied at the opposite end, the deformation may exhibit nonlinear behavior. In general the system nonlinear stiffness can be approximated to a third order polynomial. This type of systems are used in applications such as vibration isolation, for instance. In this context, this project proposes a study on the behavior of such system using the finite element method. Simplified experimental tests are proposed to support numerical simulations. (AU)