Robust prognosis of damage involving hysteresis effects in structures with bolted joints

• Grant number: 20/07449-7
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• Effective date (Start): October 01, 2020
• Effective date (End): August 14, 2022
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: Samuel da Silva
• Grantee: Luccas Pereira Miguel
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil

Abstract

Many points are still open in the literature for the Structural Health Monitoring (SHM) in structures assembled by bolted joints. Among them, it stands out obtaining robust metrics that correlate the loss of tightening torque with the variation of the hysteretic damping effects of the structure due to local changes on the friction force between the contact surfaces. It becomes even more challenging when considering indirect vibration measurements in an industrial environment subject to uncertainties and assembly variations. Thus, this project intends to find new metrics based on vibration data and extracted mainly from GP-NARX models that are able to detect, quantify and provide a damage prognosis considering loosening the bolts. (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)

MIGUEL, LUCCAS PEREIRA; TELOLI, RAFAEL DE OLIVEIRA; DA SILVA, SAMUEL. Bayesian model identification through harmonic balance method for hysteresis prediction in bolted joints. NONLINEAR DYNAMICS, v. 107, n. 1, NOV 2021. (19/19684-3, 16/21973-5, 20/07449-7, 17/15512-8)