关键词: 白杨刨片, 横纹压缩, 流变性能, 弹性变形, 塑性变形, 柔量

Abstract: The rheological behaviours in compression perpendicular to grain of the Poplar chips sliced by hand with their thickness of 0.8, 0.5, 0.35, 0.25, 0.15mm are investigated saparatly according to rheological parameters by means of the laminated method to make specimen with thickness of 10mm. The results show that the compliance of the chips is higher than that of solid wood with thickness of 10mm, and the compliance increases as the chip thickness decreases. The fact both higher elastic and plastic deformations of chips might be due to occurring in their slicing process causing the damages of strutures both their high molecules and cell wall. The changing tendency in the elastic and plastic deformations resulting from slicing process in certain extent is similar to that those occurring in compression loading. Apart from those factors affecting the rheological behaviour of both solid wood and chips, there are still two factors-chip thickness aud laminating manner with different grain orientations, which have remarkable effects on the rheological behaviours of chips.

Key words: Poplar Chips, Comperssion Perpendicular to Grain, Rheological Behaviour, Elastic Deformation, Plastic Deformation, Compliance