Investigation on the Size of reinforcement in AZ31/Al2O3 Nanocomposite withArray Distribution

Light metals and alloys such as magnesium, due to its intrinsic characteristics of low density, good machinability and availability in the global market are in close attention. However, the relatively low strength, poor room temperature ductility, and toughness limit the range of magnesium applications. Alloying with Al, Zn, Mn, Ca and other elements is a conventional way to improve properties of magnesium. In this investigation, AL2O3/AZ31 nanocomposites with cohesive interactions along interfaces were simulated and the mechanical behavior was investigated. Fracture or delamination along an interface between phases plays a major role in limiting the toughness and the ductility of the multiphase materials.Finite element method is widely employed to track fracture process and evaluate material toughness. Cohesive finite element method (CFEM) has shown its effectiveness in these issues, such as modeling the matrix fracture and phase interface failure in reinforced composites. In this paper, a cohesive finite element method is proposed on array distribution of AL2O3 nanoparticles in the AZ31 matrix to characterizereinforcement/matrix interface and debonding phenomena occurring. A statistical investigation was done for models with 50 different size of nanoparticles with 10 circular particles array dispersed, to obtain the optimum mechanical behavior. The stressstrain curves for different radius dimensions depict that the smaller particle size has higher offset yield stress and have smaller stress at the same strain.

Investigation on the Size of reinforcement in AZ31/Al2O3 Nanocomposite withArray Distribution Keywords:

MMC Nanocomposite , Debonding , Finite element analysis (FEA) , Cohesive Zone Modeling , Abaqus , Python , Matlab