Dilatation and Separation Mechanism of Fast-growing Poplar by Explosive Loading
The dynamic mechanical properties of dry and saturated fast-growing poplar under the compressive loading at higher strain rate has been investigated by split Hopkinson pressure bar (SHPB) and compared with the ones of quasi-static compression experiment to analyse and create the separation mechanism of saturated fast-growing poplar by explosive loading in the paper. The results show the compressive stress-strain curves of poplar have the three regions character, namely elastic region, collapse region and densification region. The dry poplar samples are densified for the collapse of cell walls, oppositely the saturated ones are detached along the grain direction. Dilatation and separation mechanism of fast-growing poplar by explosive loading is attribute to water in the cellular tubes which cant be compressed and extruded from fiber at higher strain rate. Thus, fiber bundles are separated and dilated along the axial direction by tensile derived from water and reflection in the free terminal under compressive stress.
fast-growing poplar dilatation by explosive loading hopkinson bar
DOU Jinlong WANG Xuguang QIN Hu
University of Science and Technology Beijing, Beijing, China;Beijing General Research Institute of M Beijing General Research Institute of Mining and Metallurgy, Beijing, China
国际会议
The Asian-Pacific Symposium on Blasting Techniques(亚洲太平洋地区爆破技术研讨会)
昆明
英文
76-79
2007-05-08（万方平台首次上网日期，不代表论文的发表时间）