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
• Start date: December 10, 2018
• End date: 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
• Institution abroad: 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

Abstract

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)