欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
利用金川二矿区深部采集的含辉橄榄岩、花岗岩和混合岩进行了常规单轴压缩试验和循环加卸载试验,结果表明循环加卸载条件下的弹性模量值较常规单轴压缩试验小。运用损伤力学分析了循环加卸载条件下弹性模量降低的现象,结果表明应力—损伤呈线性关系,损伤—应变也呈线性变化,含辉橄榄岩的累积损伤最大,花岗岩次之,混合岩最小;基于损伤力学的＂应变等效假说＂算出了加卸载条件下弹性模量的理论值,与实测值比较发现偏差较大。对循环加卸载应力—应变曲线中的塑性滞环进行了能量分析,研究表明含辉橄榄岩的能量耗散值最大,花岗岩次之,混合岩能耗最小;能量耗散值与应力呈线性关系,后次循环加卸载所耗散的能量不等于前几次能耗值的累加,主要是由于岩石材料的缺陷和非线性的特征所致。
英文摘要：
Uniaxial compression experiment and cyclic loading and unloading experiments are carried out by using peridotite specimen,granite specimen and migmatite specimen collected in deep mining of Jinchuan No.2 mining district.Experimental results show that the elastic modulus under cyclic loading and unloading conditions are smaller than that under uniaxial compression.This phenomenon has been analyzed using damage mechanics and the results show that the relationship between stress and damage is linear as well as that between damage and strain.The cumulating damage of peridotite is the highest one among the three rocks,followed by granite and migmatite.Theoretical elastic modulus has been calculated using the Equivalent Strain Hypothesis which is the theory of damage mechanics,and relative large deviation has been found when compared with experimental values.Analysis on energy containing in plastic-loop has been preceded,and the results indicate that energy dissipation of peridotite specimen is the largest one of all,followed by granite specimen and migmatite specimen,under loading and unloading conditions.The relationship between energy dissipation and stress is linear and the energy dissipation of later one is not equal to previous accumulation.It is mainly caused by the defects and nonlinear characters of rocks.
同期刊论文项目
同项目期刊论文
期刊信息
位置：