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Relationship of ultrasonic attenuation parameters signals with composite materials quality

Grant number: 15/15288-5
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): November 01, 2015
Effective date (End): January 31, 2018
Field of knowledge:Engineering - Aerospace Engineering
Principal Investigator:Marcos Yutaka Shiino
Grantee:Roberto Ferreira Motta Junior
Host Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil
Associated scholarship(s):17/03698-0 - Relationship of damage mechanisms of non-crimp composite with acoustic signal, BE.EP.IC


Due to an increasing demand for composite materials, especially in the aeronautic field, this research work will focus on finding an average attenuation range and a standard deviation of attenuation range in which it will enable us to qualify as a "good" standard quality based on a comparison with mechanical properties such as fracture toughness. The study will be based on a series of data obtained from an ultrasonic inspection (pulse-echo mode) on laminates manufactured by RTM process (resin transfer molding) which after these steps will be prepared for double cantilever beam static test in mode I (opening mode). The resulting data will be processed and compared in order to establish a relationship between ultrasonic parameters and fracture toughness properties.

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