Porous Materials, Mechanical Properties Of Numerical Simulation

Foam metal are a new kind of engineering material, such lightweight material not merely have the nature of metal, but also possesses many new characteristic, such as energy-absorption, sound insulation, heat insulation, etc. So, its range of application is expanding constantly, and call more and more scholars' attention to it.In this paper, deformation mechanism and energy absorbability of foam metal in the course of compressing were researched by finite element simulation.To the metal honeycomb, models of 7 kinds of different relative density for 0.1 to 0.4 on the relative density range were modeled, analyzed by finite element simulation in MSC.Marc software, and studied effect of the relative density on the deformation mechanism, yield strength, strain platform and energy-absorption of the metal honeycomb. In addition, four kinds of defect models of honeycomb on the basis of relative density 0.15 were modeled, such as broken edge, fill in cellular, big cellular (SBS) and small cellular(BSB). The result of finite element simulation shows that broken edge and big cellular(SBS) are the same kinds of defect, make the distortion first at defect placd;fill in cellular and small cellular(BSB) are the same kinds of defect too, make the distortion around the defect place.To the foam metal, because of the complexity of its structure, one structure analyse software (BWJScan ) was written with computer figure studying and Visual Basic programming language knowledge in this paper. The hole ratio, aperture, aperture distribution and form coefficient of the foam metal can be obtained by the BWJScan software from its section picture, besides, the 2-D model of foam metal can be obtained by the BWJScan software from its section picture, too. The 2-D model of foam metal can be analyzed by finite element simulation in MSC.Marc software, and the deformation mechanism and stress distribution situation of foam metal were researched. The result shows that the distortion of foam metal was asymmetry, distortion area was vertical with the direction of the load.