摘要
在采用熔模铸造工艺制备孔径d=2．5～3．5mm和d=3．8—4．3mm，孔隙率P=56．8％-86．6％的通孔多孔铝基础上，通过单轴压缩试验，研究通孔多孔铝的压缩性能和吸能能力。通孔多孔铝单轴压缩应力应变曲线，呈现线弹性变形、塑性平台段、压缩紧实阶段3个阶段；通孔泡沫铝的压缩屈服强度、吸能能力随着孔隙率增大而减小，采用Gibson—Ashby的模型拟合通孔多孔铝的压缩屈服强度。
Based on open - cell porous aluminum （ d = 2.5 - 3.5ram and d = 3.8 - 4.3mm, p = 56.8% - 86.6% ） prepared by investment casting, mechanical properties and energy absorption capacity were investigated by the uniaxial compression test. The results showed that compressive stress - strain curve of open - cell porous aluminum consisted of three distinct regions ： the linear elasticity region, the plastic collapse region and the densification region, and compressive strength and energy absorption capacity of open - cell porous aluminum decreased with the increase of porosity. Then the compressive yield stress was fitted by Gibson - Ashby model.
出处
《轻金属》
CSCD
北大核心
2014年第3期54-58,共5页
Light Metals
基金
江西省科技支撑项目(2010BGA01700)
凯里学院博士启动项目
关键词
通孔多孔铝
孔径
压缩性能
吸能能力
open - cell porous aluminum
pore size
compressive properties
energy absorption capacity
