公开(公告)号：US20180313727A1

公开(公告)日：2018-11-01

申请号：US15563358

申请日：2017-01-17

申请人： Northeastern University

发明人： Xia ting FENG ,  Xi wei ZHANG ,  Cheng xiang YANG ,  Shuai PENG ,  Jun TIAN ,  Rui KONG ,  Dong hui MA

IPC分类号： G01N3/12

CPC分类号： G01N3/12 ,  G01N2203/0019 ,  G01N2203/0048 ,  G01N2203/0067 ,  G01N2203/0222 ,  G01N2203/0232 ,  G01N2203/0256

摘要： An apparatus and method for determining time-dependence failure under constant temperature through high pressure true triaxial loading for hard rock, includes a pressure chamber and four actuators, wherein a sample bearing platform is arranged in a center of the pressure chamber, a sample bearing and containing chamber is arranged in a center of the sample bearing platform, and a confining pressure loading oil supply hole is formed in the sample bearing platform, and communicates with a confining pressure loading injection pump; each actuator includes a sealing cover, an annular end cover, a counter-force cylinder barrel, a piston, a piston rod, a sealing flange and a stress loading injection pump; a heating coil is arranged in the pressure chamber; a force sensor is fixedly mounted at the end part of the piston rod; and a pressure sensor is mounted in the sample bearing platform.

公开(公告)号：US20180275034A1

公开(公告)日：2018-09-27

申请号：US15558958

申请日：2017-03-28

申请人： NORTHEASTERN UNIVERSITY

发明人： Xia ting FENG ,  Xi wei ZHANG ,  Rui KONG ,  Cheng xiang YANG ,  Dong hui MA ,  Shuai PENG ,  Lei SHI ,  Zhi bin YAO ,  Jun TIAN

IPC分类号： G01N3/307

CPC分类号： G01N3/307 ,  G01M7/08 ,  G01N2203/0055 ,  G01N2203/0067 ,  G01N2203/0098 ,  G01N2203/0232

摘要： A high-pressure true triaxial test apparatus with capacity of low-frequency disturbance and high-speed impact includes static and dynamic loading frames, four static loading actuators, two dynamic loading actuators and an SHPB mechanism, wherein all actuators are connected with a hydraulic station system; a hollow way is formed in the axial center of each piston shaft of the dynamic loading actuators, a dynamic pressure sensor adopting a hollow ring structure is mounted at the end part of each piston shaft, and the SHPB mechanism applies a high-speed impact load on a rock sample through the dynamic pressure sensors respectively; and the dynamic loading actuators adopt a static pressure oilway balance support sealing manner and are connected with the hydraulic station system, each oilway is provided with an energy accumulator, and flow is increased by the servo valves to drive pistons to perform dynamic response.