Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Theoretical-experimental comparison of the classical laminate theory for composite materials of fiberglass and polyester matrix
Submission Author:
César Tadeu Nasser Medeiros Branco , SC , Brazil
Co-Authors:
Igor dos Santos Gomes, Douglas Santos Silva, Luciano Monteiro Almeida, Fábio de Sousa, Luiz Fernando Nazaré Marques, Jullyane Figueiredo, Ives Okabe, Geisiane Freitas Miranda, Moacir Kuwahara, Roberto Tetsuo Fujiyama, César Tadeu Nasser Medeiros Branco
Presenter: Ives Okabe
doi://10.26678/ABCM.COBEM2017.COB17-2849
Abstract
Synthetic fiber composite materials have good mechanical properties and it presents a good alternative material in view of metallic materials. This work makes an experimental and theoretical comparison, through the classical laminate theory (CLT), of fiberglass composite material and polymer matrix. For the experimental analysis, tensile tests of the fiberglass laminate composite were developed according to ASTM D3039. For the determination of stresses and strains, the elastic properties of the composite were determined by the rule of the mixtures, and then these values were inserted into the CLT matrices for the definition of the representative strain/strain curve. The results of the experimental and theoretical longitudinal modules diverged by 35%, but for the ultimate stress the error was 25%. The difference between the theoretical and the experimental results occurs according to the considerations of the microstructural analysis. Experimentally the fiber and matrix do not present a perfect adhesion, there are voids in the matrix and the alignment of the fibers are not parallel to the force application, contributing to the difference between the results presented in the work.
Keywords
Tensile Test, classical laminate theory, polyester matrix, elastic properties
