Eventos Anais de eventos
MECSOL 2019
7th International Symposium on Solid Mechanics
A methodology to predict longitudinal failure in unidirectional composites considering imperfect fiber/matrix interface
Submission Author:
José Humberto Almeida Júnior , South Karelia , Germany
Co-Authors:
José Humberto Almeida Júnior, Bruna Favoretto, Lars Bittrich, Axel Spickenheuer, Volnei Tita
doi://10.26678/ABCM.MECSOL2019.MSL19-0173
Abstract
Composite materials under longitudinal and mainly transverse loads to the fiber orientation often fail due to debonding between fibers and matrix. In this research, a micromechanical model is developed to evaluate the interfacial effects in carbon fiber-reinforced composites under several loading scenarios. Interface models were used to simulate the interaction between matrix and fibers. Representative volume element consisting of fiber, matrix and interface was established for the simulation, considering or not random fiber distribution. The two dominant damage mechanisms of fiber reinforced composites, matrix plastic deformation and interfacial debonding were taken into account in the simulation. Periodic boundary conditions were applied to the representative volume elements. The results are considered for simulating the meso-scale response of variable-stiffness laminates.
Keywords
Fiber-matrix interface, micromechanical modeling, damage mechanism, Representative Volume Element
