摘要
研究5种木材顺纹理断裂性质和断面分形特征,测量断口表面的分形维数,建立了分形维数与断裂韧性间的关系.研究结果表明:(1)不同树种因其构造差异对裂纹扩展的阻力不同,这种差异同样也表现在材料断裂表面的形貌特征上;(2)木材顺纹理断裂韧性K_(IC)^(TL)与分形维数D之间有很高的正比关系:y=0.036x+2.162,(R^2=0.98),揭示了断口分形维数与材料性能之间的内在联系.
Studies on fracture and fractal characteristics of five kinds lumbers,measures fractal dimensions on fracture surface.The results show that：（l）the fracture resistance are differences because textural diversity of the different species,this types of difference also displays in the material break surface;（2）the toughness of wood fracture KTLIC is directly proportional to the fractal dimension D,the relation is y=0.036x＋2.162,（R^2=0.98）.The internal relations between the fractal dimension of a fracture and the properties of materials are revealed.
出处
《生物数学学报》
CSCD
北大核心
2009年第1期177-182,共6页
Journal of Biomathematics
基金
国家自然科学基金(30571452)
关键词
木材断裂
分形
断裂韧性
分形维数
Wood fracture
Fractal
Fracture toughness
Fractal dimension
