The fatigue crack growth (FCG) in a mesoscale metal matrix composite (MMC)sample has been simulated by the analyses of a 3D finite elements (FEs) model of a sample volume cell of the composite. Several FCG numerical simulations have been performed on MMC specimens made of aluminum (Al) alloy and silicon carbide (SiC). First, in the microscale, the homogenization of the single MMC unit cell has been performed in order to find the crack initiation sites. Subsequently, in the mesoscale, a tensile remote load with appropriate boundary conditions has been applied on the MMC unit volume. Simulation of FCG has been carried out using the Paris law and two non‐linear laws for small‐scale yielding (SSY), namely, the modified Kujawski‐Ellyin (KE) and UniGrow laws. Finally, the FCG rates provided by numerical simulations have been compared with each other.
Non‐linear fatigue propagation of multiple cracks in an aluminium metal matrix composite (AlMMC) with silicon‐carbide fibre reinforcement
Marcello Lepore
Writing – Original Draft Preparation
;
2019-01-01
Abstract
The fatigue crack growth (FCG) in a mesoscale metal matrix composite (MMC)sample has been simulated by the analyses of a 3D finite elements (FEs) model of a sample volume cell of the composite. Several FCG numerical simulations have been performed on MMC specimens made of aluminum (Al) alloy and silicon carbide (SiC). First, in the microscale, the homogenization of the single MMC unit cell has been performed in order to find the crack initiation sites. Subsequently, in the mesoscale, a tensile remote load with appropriate boundary conditions has been applied on the MMC unit volume. Simulation of FCG has been carried out using the Paris law and two non‐linear laws for small‐scale yielding (SSY), namely, the modified Kujawski‐Ellyin (KE) and UniGrow laws. Finally, the FCG rates provided by numerical simulations have been compared with each other.| File | Dimensione | Formato | |
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Mat Design Process Comms - 2019 - Lepore - Non‐linear fatigue propagation of multiple cracks in an aluminium metal matrix.pdf
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