摘要
测量了经过随机打孔的有机玻璃板、钢板及铝板在渗流阈值附近的杨氏模量、屈服强度、断裂强度及断裂功。结果表明,杨氏模量、屈服强度和断裂强度均服从幂律。一般认为,渗流网络的弹性模量主要由扭转力决定,而我们的讨论表明,拉伸力和扭转力共同决定了系统的弹性模量。实验确定的模量指数、屈服指数、断裂指数及分形维数都处于理论界定的范围之内。
We performed the measurements of the bulk modulus E,yield strength S_y,fracture strength S and fracture work W in randomly punched plates of plexiglass,steeland aluminium.A power law relation is observed for E,S_y,and S near the percolationthreshold and the determined exponents of our samples appear to be considerably lowerthan the theoretical determinations for a bond-bending force system,and hence,thebond-stretching nature of the samples is taken into account to interpret the difference.
关键词
孔板
强度
渗流
弹性
断裂
porous plate
elacticity
yield
fracture
percolation
