摘要
提出了利用侧限SHPB装置测量软材料体压缩特性的实验方法。该方法利用霍普金森压杆对试样施加轴向压缩,同时依靠金属薄壁套筒约束试样的径向膨胀。通过套筒外壁的环向应变得出了试样径向应力、径向应变,再结合压杆应变片信息,可以获得试样的流体压强-比容变化过程。利用该方法进行了高聚物泡沫材料的动态压缩实验,证实了该方法对测量软材料的体积压缩特性是可行的。
An experimental approach was presented to investigate dynamic compressive behaviors of soft materials by a split Hopkinson pressure bar （SHPB） setup with lateral confinement. In the dynamic experiments, the specimen was confined in a thin-walled metallic sleeve and loaded axially by a split Hopkinson pressure bar. The radial stress and strain of the specimen was obtained by the circumferential strain at the outer wall of the sleeve. By combining the signals recorded by the two gauges on the Hopkinson pressure bar, the hydrostatic pressure-volume evolution of the specimen was achieved. Additional dynamic compression experiments were conducted on polymeric foam materials by the above method. Experimental results display that the presented method can be used to measure the volume compression characteristics of soft materials.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2010年第1期109-112,共4页
Explosion and Shock Waves
基金
国家自然科学基金项目(10802080)~~
关键词
固体力学
体压缩
SHPB
软材料
侧限
solid mechanics
hydrostatic compression
SHPB
soft material
confinement
