Identificação de falhas em compósitos laminados usando Unscented Kalman Filter

• Autor(a) principal: Florindo, Leone Bernardo
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/9765
• topic: Unscented Kalman Filter; Inverse problems; Bayesian filters; Thermal contact conductance; Laminated composite; Filtros bayesianos; Condutância térmica de contato; Compósitos laminados; Engenharia Mecânica; Kalman, Filtragem de; Problemas inversos (Equações diferenciais); 621

Composite materials have numerous applications in the most varied areas of engineering.In this scope, mastery of these materials becomes necessary. The composite materialacquires properties of each materials that constitute it. However, between its layers theremay be adhesion failures, compromising its quality. In this way, it is proposed to estimatethe thermal contact conductance at the interface of a laminated composite, which canbe directly associated with adhesion failures. Therefore, it was proposed to apply theUnscented Kalman Filter with the method of lines to solve an inverse heat transfer problem.It was established a physical problem characterized by being transient regime and two-dimensional, then the thermal contact conductance at the interface between the layers is afunction of time and space in one direction. The temperature measurements used as inputdata for the equations that model the problem were obtained through simulations. In thetests carried out, a variety of materials and composite dimensions were used. A sensitivityanalysis was made regarding noises in the measuared temperatures and a verification ofthe influence of the time in the physical problem relating to the computational effort. Theresults have shown that the methods applied were effective to indentify the laminatedcomposite failure