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Grant number: 13/13214-9
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2014
Effective date (End): August 31, 2017
Field of knowledge:Engineering - Aerospace Engineering
Principal Investigator:Edson Cocchieri Botelho
Grantee:Samia Danuta Brejão de Souza
Host Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil
Associated scholarship(s):16/07586-9 - Welding process study for integration of peek/carbon fiber composite for aeronautical applications, BE.EP.DR


The technology improvement of advanced polymeric composites has as one of its functions the junction of materials that present unique properties such as high strength and stiffness allied with low density. One of the major problems of using polymer composites in structural application consists in the effective joint for integrating components. In this behalf, recent studies demonstrate that the technique of electrical resistance welding is one of the most promising for bonding composites, as a rapid method because it does not require much surface preparation. This work aims to evaluate the more appropriate parameters of electrical resistance welding for PEEK [poli(eter-eter-cetona)] designed for aeronautical applications. For this purpose, the parameters will be evaluated leading into account time, electric current and pressure to be used in the welding process (through the procedure of design of experiments) and three different types of resistive elements in the welding process. The characterization of the welded materials will be made by means of mechanical tests (Lap Shear, Iosipescu, ENF and CST), thermal analysis (DMA and TMA), evaluation of the influence of environmental constraints (UV, moisture and salinity) in welded samples and analysis morphological and fractures resulting from mechanical tests by scanning electron microscopy (SEM).During the development of the work, will also be evaluated the heat transfer in the interface region (welded region) as well as the kinetics of crystallization induced in this region, being an unpublished study for this kind of technology.

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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)
MIRANDA BARBOSA, LORENA CRISTINA; BREJAO DE SOUZA, SAMIA DANUTA; BOTELHO, EDSON COCCHIERI; CANDIDO, GERALDO MAURICIO; REZENDE, MIRABEL CERQUEIRA. Fractographic study of welded joints of carbon fiber/PPS composites tested in lap shear. ENGINEERING FAILURE ANALYSIS, v. 93, p. 172-182, . (13/13214-9)
MIRANDA BARBOSA, LORENA CRISTINA; BREJDO DE SOUZA, SAMIA DANUTA; BOTELHO, EDSON COCCHIERI; CANDIDOA, GERALDO MAURICIO; REZENDE, MIRABEL CERQUEIRA. Fractographic evaluation of welded joints of PPS/glass fiber thermoplastic composites. ENGINEERING FAILURE ANALYSIS, v. 102, p. 60-68, . (17/16970-0, 13/13214-9)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
SOUZA, Samia Danuta Brejão de. Study of the welding process for the integration of peek/carbon fiber composites for aeronautical applications. 2017. Doctoral Thesis - Universidade Estadual Paulista (Unesp).

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