Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
MECHANICAL, THERMAL AND FATIGUE PROPERTIES OF GLASS FIBER REINFORCED POLYAMIDE 6 COMPOSITE AS A SUBSTITUTION FOR STEEL FOR WEIGHT REDUCTION OF VEHICLES
Submission Author:
Martin Ferreira Fernandes , SP
Co-Authors:
Martin Ferreira Fernandes, Roberto Ferreira Motta Júnior, Mariana Cardoso, Maria Odila H. Cioffi, Herman J. C. Voorwald
Presenter: Martin Ferreira Fernandes
doi://10.26678/ABCM.COBEM2019.COB2019-2413
Abstract
The weight reduction of structural automotive components is important for the automotive industry considering the energy efficiency, fuel consumption and the further increasing rigorous environment restrictions concerning the CO2 emission of vehicles. The employment of lightweight materials, such as polymer composites, is an effective way to reduce the weight of vehicles. The mechanical, fatigue and thermal properties of 60% glass fiber reinforced polyamide 6 (PA6/G60) were investigated and compared to LNE 500 steel properties. The feasibility of the substitution of LNE 500 steel for PA6/G60 in an automotive stringer structure was evaluated. Axial fatigue tests were performed for both materials at room temperature. Fracture surfaces were observed through scanning electron microscopy. Flexural tests at perpendicular and parallel directions to the fiber orientation, thermogravimetric analysis, and differential scanning calorimetry were carried out for the PA6/G60 composite. The finite element method was used to obtain the stress distribution in an automotive stringer with the substitution of part of the structure for the composite. The results showed that the PA6/G60 composite has lower mechanical, thermal and fatigue properties than LNE 500 steel. The substitution of steel for lightweight composite materials for automotive structural applications may lead to the necessity of new design concepts.
Keywords
polymer composites, Glass fiber, fatigue, Finite Element Method, polyamide 6
