The paper presents a micromechanical based model for the simulation of diffuse damage in the form of matrix microcracking in composite laminates. The aim of the work is to construct an analytical model at the ply level, which can be easily implemented into FEM codes and used for numerical simulation of complex structures. First, homogenisation techniques are employed for constructing appropriate damage laws at the ply level and for identifying the main damage parameters. These laws present several shortcomings that are deeply discussed in the text. Analytical solutions based on shear-lag and variational mechanics models for damaged laminates are then employed to support the homogenisation based models through appropriate correction factors. In this way the model is able to distinguish between embedded and surface damaged plies and to take into proper account several different loading conditions applied to the laminate (in-plane loads, out-of plane loads, bending…).
Modelling of Matrix Microcracking in composite Laminates
RICCIO, Aniello
2007
Abstract
The paper presents a micromechanical based model for the simulation of diffuse damage in the form of matrix microcracking in composite laminates. The aim of the work is to construct an analytical model at the ply level, which can be easily implemented into FEM codes and used for numerical simulation of complex structures. First, homogenisation techniques are employed for constructing appropriate damage laws at the ply level and for identifying the main damage parameters. These laws present several shortcomings that are deeply discussed in the text. Analytical solutions based on shear-lag and variational mechanics models for damaged laminates are then employed to support the homogenisation based models through appropriate correction factors. In this way the model is able to distinguish between embedded and surface damaged plies and to take into proper account several different loading conditions applied to the laminate (in-plane loads, out-of plane loads, bending…).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
