Interlaminar Damage Model for Polymer Matrix Composites

Abstract

A constitutive model for fiber-reinforced composite materials with damage and unrecoverable deformation, which for the first time accounts for interlaminar damage, is presented. The formulation is based on Continuous Damage Mechanics coupled with Classical Plasticity Theory in a consistent thermodynamic framework using internal state variables. In-plane damage and novel formulation of interlaminar damage are included in order to describe the main failure modes of laminates structures. A novel implementation of the constitutive model into a finite element formulation incorporating geometric nonlinearity is presented. The model uses a small number of adjustable parameters, which are identified from available experimental data. Comparisons with experimental data for composite laminates under torsion loading are shown to validate the model for interlaminar damage. Coupled material and geometrical nonlinear analysis with simultaneous in-plane and interlaminar damage is demonstrated. The effect of warping on interlaminar damage is shown to be significant.

Analytical Solution for Bending of Laminated Composites with Matrix Cracks

“…These solutions are either approximate, e.g., [3][4][5][6][7] or numerical, e.g., [8][9][10][11]. More refined methods require adjustable parameters, for example in the form of empirical hardening laws [12,13], and combinations of fracture and strength properties, for example [14].…”

Intra and damage analysis of laminated composites using coupled continuum damage mechanics with cohesive interface layer

“…In 2002 Barbero and Lonetti [36] extended their previous model [35] to include plasticity. This model was developed further by Lonetti et al [53] containing the modification to include tri axial orthotropic damage in terms of three damage eigenvalues.…”

Progressive damage of laminated cylindrical/conical panels under meridional compression

“…The damage potential is defined as a function of damage driving forces, overall hardening parameter which defines the damage threshold and damage parameters (Lee et al, 1985). A number of researchers have used quadratic damage potentials as functions of damage driving forces (Kattan and Voyiadjis, 1993a,b;Voyiadjis and Kattan, 1993a,b;Barbero and de Vivo, 2001;Lonetti, 2001, 2002;Lonetti et al, 2003) and derived the damage evolution from extremum conditions of damage dissipation power density. The components of anisotropic damage parameters were determined experimentally based on uniaxial tensile tests along the three principal material directions (Kattan and Voyiadjis, 1993a,b;Voyiadjis and Kattan, 1993a,b) whereas Barbero and de Vivo (2001), Lonetti (2001, 2002) derived orthotropic damage parameters at the lamina level using strength properties and inplane shear stress versus shear strain curve.…”

“…The components of anisotropic damage parameters were determined experimentally based on uniaxial tensile tests along the three principal material directions (Kattan and Voyiadjis, 1993a,b;Voyiadjis and Kattan, 1993a,b) whereas Barbero and de Vivo (2001), Lonetti (2001, 2002) derived orthotropic damage parameters at the lamina level using strength properties and inplane shear stress versus shear strain curve. The interlaminar damage effect is included by Lonetti et al (2003). Ladeveze and Le Dantec (1992) assumed damage evolution law as linear function of equivalent damage driving force and proposed a mesomechanical damage model for single-ply laminate considering matrix microcracking and fiber/matrix debonding represented by two internal state variables.…”