作　　者： ; ; ; ;

机构地区： 合肥工业大学材料科学与工程学院

出　　处： 《材料热处理学报》 2004年第2期68-71,共4页

摘　　要： 采用分离式霍普金森压杆 (SHPB)技术 ,研究了应变速率 (1× 10 - 3s- 1 ～ 2 5 0 0s- 1 )对泡沫铝力学性能和能量吸收性能的影响。结果表明 :泡沫铝有较高的应变速率敏感性 ,随应变速率的增加 ,泡沫铝的屈服强度和吸能能力增加 ,泡沫铝的应变速率敏感性随应变、应变速率变化幅度的增加而增加。 SHPB was used to investigate the strain rate effect on the mechanical properties and energy absorption capacity of aluminum alloy foams.Their response to strain rate was tested over a wide range of strain rates, from 1×10 -3s -1 to 2600s -1 at room temperature.The results show that aluminum alloy foams show high strain rate sensitivity.The strain-rate dependence of aluminum alloy foam properties derives from strain-rate dependence of the solid of the cell walls, micro-inertia and the gas which fills the cells.The compressive strength and energy absorption capacity of foams increase with the increasing of strain rate and energy-absorption efficiency decreases with the increasing of strain rate.As is the case with dense metals, the strain rate sensitivity ( m ) of the foam is not a constant value, but found to be dependent on the strain and incremental amount in strain rate.

关 键 词： 闭孔泡沫铝 霍普金森压杆 应变速率 力学性能 吸能性能

领　　域： [一般工业技术] [理学] [理学]