摘要
针对高速冲击下材料的层裂破坏，用盒子计数法和码尺法计算了一种铝合金的层裂剖面的分形维。结合层裂破坏形貌的微观观测讨论了分形标度区范围。测定了材料的微结构分布，对材料中的二相粒子尺寸，晶粒尺寸以及相邻的二相粒子间距的分布，层裂破坏形貌展示的自相似范围和计算分形维数时的标度区范围进行比较，发现相邻的二相粒子间距的分布范围和层裂破坏形貌的自相似范围以及分形维的标度区范围是相当的。
In this paper fractal dimensions of three spalling samples of Al-alloy under impactloading were calculated by box-counting and stick-measuring methods.By observing spalling frac-tography under SEM and determining the range of self-similarity,we paid particular attentions onthe determination of their fractal scaling ranges.By measuring microstructual distributions,thesize distribution of second phase particles and grains,and the spacing between two neighbouringsecond Phase particles,we found that the spacing range between two neighbouring second phaseparticles was comparable to the range of self-similarity of spalling fractography and the calculatedfractal scaling range.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1994年第1期1-8,共8页
Explosion and Shock Waves
基金
国家自然科学基金
