Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Numerical Thermomechanical Analysis of a Composite Sandwich Beam
Submission Author:
Lucas Antonio de Oliveira , MG
Co-Authors:
Lucas Antonio de Oliveira, Rafael Augusto Gomes, Matheus Brendon Francisco, Guilherme Ferreira Gomes, Sebastião Simoes Cunha Jr
Presenter: Sebastião Simoes Cunha Jr
doi://10.26678/ABCM.COBEM2023.COB2023-0211
Abstract
If composite materials are to be used safely and perform at a high level, existing internal damage must be detected. Therefore, viscoelastic characteristics can be exploited during cyclic loading of the material. Both internal heat generation (induced by hysteresis), resulting from the application of loading cycles, as well as thermal conductivity and specific mass, are intrinsic characteristics of the material but may present variations in regions with defects. Therefore, the choice of the parameters that make up the excitation signal (amplitude and natural frequency) and the characterization of the individual properties of the materials that make up the structure are necessary for the study. From the excitation signal obtained from the modal analysis, the maximum stresses per cycle obtained in the nodes generated by the finite element method, the thermal properties, and the modulus of material loss resulting from heat dissipation by hysteresis obtained experimentally in the laboratory, it is possible to determine the temperature increment per node of the structure. As a result of these procedures, an analysis of the temperature profile on the material surface is performed, which will allow for the detection of damage near the structure's surface.
Keywords
Vibrothermography, Viscoelastic, Composites, sandwich beam
