Study On Bending Behaviors Of Single Crystal Copper Pole

Matter material mechanical performance changes with its different size. When thesolid is reduced to nanometer scale size, its mechanical properties and mechanical may bedifferent to macro scale. Nanometer metal materials have unique and excellent mechanicalproperties. Characterization the micro structure mechanical behavior of materials plays avery important role for the nano-technology application to structural material.Based on the EAM embedded atom potential of molecular dynamics method, byusing VC++programming software, the paper simulated single crystal copper poles'bending mechanical properties under lateral loads, the single crystal copper has two cases:one has crack defect, the other has no defect. It also analyzed the kinetic energy changingin the relaxation process, atomic configuration and the loading-deflection relationshipwhen it ended loading, it considered the temperature and slenderness ratio on influence ofbending properties of single crystal copper poles, finally it simulated the jean-shaped crosssection of single crystal copper poles' bending mechanical behavior, it analyzed thejean-shaped cross section size changes on influence of the bending strength, it contrastedwith macro simulated results.The results show that: in the beginning phase, two kinds of single crystal copperpoles under transverse forces showed considerable stability, basically no deformation,with the load increasing, the deformation trend appears bigger changing with increasedslope and deformation speed. With the increasing of length, no defect and crack defectmodels' bending strength increase, with the increasing temperature, the bending strengthdecreases, but the kinetic energy increases with length and temperature increasing. Thedifferent point is in the same size, the bending strength of no defect model is significantlyhigher than that of crack defect model, when it damages, absorption energy are also more.The bending strength of jean-shaped cross section of single crystal copper poles changeswith the difference of section size, the macro simulation of loading-deflection curve hassame trend with the microscopic curve.