DELAMINATION ANALYSIS FOR COMPOSITE MATERIALS

Abstract

Composite materials became an advantageous option due high specific strength and stiffness; nowadays the applications grow. Unidirectional fiber composite materials have complexes damage mechanisms; moreover the delamination process is the most important mechanism considering the structural integrity, being important its understanding and evaluation. As a consequence, the main purpose of this work, using previous fracture properties identification, is to simulate numerically delamination process through a finite element code. For that, delamination tests: DCB (Double Cantilever Beam) and ENF (End Notched Flexure), which identified critical fracture energies for interface 0/0 and 0/90 in modes I and II. Numerical simulations were run, these based on damage interface model that considers deformation energy and activation force for the delamination inception. Preliminary results show the numerical simulations ability to predict the experimental data.

Keywords

• Composite laminate; Delamination; Damages; Numerical simulation.