<正>本文阐述了分析干燥应力的热弹性理论,推导了本构方程和平面干燥应力问题的有限元计算公式,并计算和测定了水曲柳板的干燥应力。其结果表明:弹性解答适用于分析干燥初期的应力状态;应力最大值在中央剖面的上下边界处,木材的干缩过程存在耦合效应。

In this paper, the theory of thermoelasticity applicable to the analysis of drying stresses is expounded, constitutive eqations and formulas for calculating the finite elements in the stresses of drying planes are developed, and the drying stresses of the cross sections of Manchurian ash (Fraxinus mandshurica Rupr.) boards at any stage of drying are measured. The results of determinations and calculations show that elastic solutions are applicable to analyzing stress conditions at the first stage of drying, that the maximum stress is at the upper and lower layer of the middle of the board, and that there exists a coupling effect in the shrinkage of wood.