摘要
木材承载时细观结构上的损伤会在木材中扩展,并且损伤和缺陷在载荷下的演化行为决定着木材的宏观力学行为。木材的细观损伤基元可以归纳为4类:1)胞、壁层间界面损伤;2)细胞壁屈曲与局部塌溃损伤带;3)微孔洞损伤与汇合;4)微裂隙损伤(区)。追踪分析木材从变形、损伤到断裂破坏的全过程,探明微结构演化与宏观行为关系,有助于揭示木材破坏的机制,并从中获得新的木材构造与其强韧功能相互关系的认识,对研发能够克服木材缺点、具有特殊强韧性能的新型木基复合材料具有重要指导意义。
When wood bears load, damage in its meso-structure in material would grow, and the evolving behavior of damage and crack determines its micro-mechanics behaviors. Meso-damage elements of wood could be devided into four kinds.： 1 ） cell or cell wall interface damage; 2）cell wall bucking and local landslide damaged zone; 3）micro-cavity damage and converge; 4） micro-cracks damage. Follow-up analyzing the entire process from deformation, damage to fracture and proving up the relationship between micro-structure evolution and micro-behavior would be useful to reveal the mechnism of wood rupture from which gains the new cognition of the interrelation between wood structure and its function of strength and toughness. They have a guiding for researching and developing new types of wood-based composite materials that would overcome the flaw of wood and have a special capability of strength and toughness.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2007年第4期107-110,共4页
Scientia Silvae Sinicae
基金
国家自然科学基金项目(30571452)
关键词
木材损伤断裂
细观损伤基元
唯象学方法
wood damage-fracture
meso-damage elements
phenomenologi research
