摘要
采用同直径不同高度的砂岩试件进行岩石全程应力．应变试验，发现了砂岩的应变软化尺寸效应，即峰值强度后随着试件高度增加，岩石脆性增大。对这一试验结果，采用梯度塑性理论进行分析，理论解和试验值取得了较好的一致性。
The sandrock specimens of different diameters and heights in stress-strain test are adopted. The size effect on rock strain softening is found. The rock brittleness increases after postpeak with the height of the specimen. To this result, the theoretical analysis and experimental result reach a good agreement by using the gradient plastic theory.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2002年第2期215-218,共4页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩石
应变软化
尺寸效应
梯度塑性理论
Brittleness
Mechanical testing
Particle size analysis
Plasticity
Strain
