弧形竹片干燥过程中半径变化规律的研究

Change in Radius of Moso Arc Spatulate during Drying

该文研究了毛竹弧形竹片半径随干燥温度、含水率及干缩率的变化规律，分析了弧形竹片含水率、干缩率及半径的相互关系。结果表明：干燥温度越高，干缩率越大，变形也增大，半径增大；由于弦向竹青侧干缩大于竹黄侧，使得干燥过程中弧形竹片的半径增大，初始半径为50mm的弧形竹片经干燥特性试验后，半径变为58～62mm；随着含水率下降，干缩率增大，半径增大，当含水率降至5％以下时，干缩率与半径趋于稳定。

This article focused temperature, water content and on the shrinkag radius change of arc spatulate under different e rate. At the same time, the interrelationships drying among water content, shrinkage rate and radius of arc spatulate were analyzed. The results showed that the higher the drying temperature, the greater the shrinkage rate, deformation and radius. Due to the larger outerwall shrinkage rate than that of the madial wall, the radius of the arc spatulate increased during drying, the radius of arc spatulate with initial radius of 50 mm became 58 mm- 62 mm after drying. Both shrinkage rate and radius increased as a result of the decrease in water contend, but when the water content was below 5% , the shrinkage rate and the radius tended to be stable.