Abstract
The aim of this article is to simulate the damage initiation and progression in unidirectional (UD) laminates. A three-dimensional (3D) failure criteria of Puck incorporated with degradation scheme is developed. Two types of degradation law known as sudden degradation are used to predict the damage progression in UD laminates. The establishment of constitutive law in progressive damage model (PDM) is achieved through implementation of user subroutines in Abaqus. The failure analysis is applied to various composite stacking sequences and geometries, as well as different fiber reinforced polymer (FRP) composite materials. The comparative studies revealed that the predicted ultimate failure load agree well with those available in the literature.
Highlights
Damage initiation and evolution in composite structures is very crucial to be analyzed which can occur in several failure mechanisms such as fibre breakage, fibre buckling, matrix cracking, material debonding and delamination
The proposed models are able to predict the effect of specimen sizes including thickness and diameter of the laminate, as well as different stacking sequences
The performance of method 2 are better than method 1 due to smaller reduction of stiffness matrix
Summary
Damage initiation and evolution in composite structures is very crucial to be analyzed which can occur in several failure mechanisms such as fibre breakage, fibre buckling, matrix cracking, material debonding and delamination. Further development of Puck's theories is carried out by Davila et al [11] which included evaluation of fracture planes for matrix cracking and utilization of fracture mechanics approach to determine the in-situ strength This criterion is meant for 2D failure analysis and later extended to 3D problems including shear non-linearity developed by Pinho et al [12]. Another approach to predict the initial failure of composite structures is to use the continuum damage mechanics (CDM) method at ply level.
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