一、前言木材物理力学性貭主要指标之一是强度。在詳細了解木材物理力学性貭的条件下,可以在各种情况下合理利用木材(1955)。木材在加工和利用过程中,經受到的应力是拉力、压力、弯曲、剪切(剪力或切断)、劈开、扭曲。木材扭 I. Introduction Wood physics and mechanics 貭 one of the main indicators of strength. With a detailed understanding of the physical and mechanical properties of wood, timber can be rationally used in all circumstances (1955). Wood in the process of processing and utilization, the stress is tensile, pressure, bending, shear (shear or cut), split, twisted. Wood twist