Comparing Mechanical Properties of AL/Cu Composite Obtained by Mori-Tanaka and Dynamic Molecular Methods

Normal 0 false false false EN-US X-NONE AR-SA /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0in; line-height:107%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri",sans-serif; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial; mso-bidi-theme-font:minor-bidi;} Normal 0 false false false EN-US X-NONE AR-SA /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0in; line-height:107%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri",sans-serif; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial; mso-bidi-theme-font:minor-bidi;} For composites, one of the most important problems is calculating the mechanical properties using properties of the composite contents by a homogenization method. In this paper a macro homogenization method has been compared with dynamic molecular method(MD) for the first time. For this purpose the influence of copper (Cu) content on the mechanical properties of Aluminium (Al) has been studied. For investigation properties of composites in macro scale there are various methods for homogenization. Mori-Tanaka Eshelbi(M-T) is an interesting method for homogenization. On the other hand, MD is an effective and different method for extracting mechanical properties of nanocomposites. In this paper Young modulus of AL/Cu have been calculated by M-T and MD methods and the results have been compared. For this comparison at the first, using MD method, the Al/Cu nanocomposite box's dimensions were set to 80 × 80 × 80 Å 3 . The Al/Cu nanocomposite was subjected to uniaxial tension using molecular dynamics simulation and LAMMPS package software. For M-T method, Young modulus of AL and Cu, separately, have been extracted by MD using the same box dimension. Then Young modulus of AL/Cu composite has been computed by M-T homogenization method. According the analysis, for low percent of Cu ( 1% and 2%) the difference between two methods is less than 16% but for higher percent of Cu, the difference is more than 300% . According these results, for higher percent of Cu, M-T as a macro model for simulation of nano scale is not suitable.