Finite element analysis of the thermomechanical behavior of metal matrix composites (MMC)

Abstract

In this work the finite element method (FEM) was used to analyze the mechanical behavior of the composite materials subjected to the mechanical loading. This behavior is studied in terms of stress intensity factor variation as a function of the applied stress intensity. The residual stresses induced in the composites, during the elaboration of these composites are taken into consideration in this study. The superimposition of these types of stresses (residuals and commissioning) is simulated here by thermomechanical stresses. The results obtained show that in the vicinity very close to the fibermatrix interface and under the effect of this loading type, the matrix cracks propagate in modes I, II and III, and far from the interface, in mode I. The propagation kinetics is slowed down by the interface-crack interaction. The effects of the crack size, the orientation and propagation of the crack, commissioning stresses, the elaboration temperature, fiber physical properties, matrix stiffness and thermomechanical stresses have been highlighted in this work.

Numerical analysis of the influence of maximum residual thermal stresses on the intensity factor between the matrix and particle interfaces in metal matrix composite

“…he results of the numerical simulations at for purpose study the influence of temperature variation and inter-distance (d) between crack and particle on maximum residual stresses and stress intensity factors. The numerical code "Abaqus 6.11" was valid by comparing the numerical results with those collected in the literature [1,2]. The Fig.…”

“…The propagation kinetics are strongly slowed when its front approaches very proximity to the fibre-matrix interface, and then develops rapidly in the fibre. This behaviour is all more accentuated as these tensions are stronger [1]. Using a simple cubic cell model with square reinforcement forms was developed to study its effect on the mechanical properties of MMC.…”