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Environmental influence on thermal and mechanical properties of PPS/carbon fiber composite ultrasonic welding for aeronautical applications

Grant number: 18/14925-0
Support Opportunities:Scholarships abroad - Research Internship - Scientific Initiation
Effective date (Start): December 10, 2018
Effective date (End): March 09, 2019
Field of knowledge:Engineering - Aerospace Engineering
Principal Investigator:Edson Cocchieri Botelho
Grantee:Izabely Gonçalves Araújo Costa
Supervisor: Irene Fernandez Villegas
Host Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil
Research place: Delft University of Technology (TU Delft), Netherlands  
Associated to the scholarship:17/04147-7 - Influence of the environmental effect on the thermal and mechanical properties of welded PPS/ carbon fibers composites with aeronautical application, BP.IC


One of the main difficulties in using composites is how to join the material with a good adhesion. The ultrasonic welding joint technique has been one of the most promising ways to promote this union, mainly in the aeronautical area, for being a fast process, suitable for thermoplastic composites and non-permanent inclusions in the region of welded interface for composites reinforcements with carbon fiber or glass fiber. There are very relevant works of ultrasonic welding in thermoplastic composites, but this technique is not fully understood. This project also aims to evaluate the impact of environmental effects involving humidity, temperature and ultraviolet radiation in the thermal and mechanical performances of welded PPS composites (poly (phenylene sulphide)). After welding, these composites will be conditioned into hygrothermal and UV radiation chambers and the environmental effects will be evaluated from mechanical tests (CST, ILSS and Lap shear tests), thermal analysis (DMA and TMA) and by optical microscopy. (AU)

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