An apparatus for providing pressure to a sample. The apparatus comprises a housing having a cavity, an elastomer within the cavity, and a means for providing pressure to the elastomer within the cavity. The housing and the elastomer are configured to allow a sample to be inserted into the cavity, such that the sample is surrounded by the elastomer and such that the elastomer and the sample together fill the cavity.

A structure multi-dimensional loading test system considering real complex boundary conditions considering real complex boundary conditions comprises a main part of machine, a base part, a hydraulic power supply and a control system. The system can simulate the load borne by a structure in a real working environment better and more accurately, realize multi-dimensional loading of the structure with six degrees of freedom in space and provide more real and valuable experimental data for the research on damage of reinforced concrete materials, components and structures under the action of an earthquake, and the research results will help researchers further reveal the damage mechanism of reinforced concrete structures, put forward the corresponding damage criteria and develop the corresponding seismic design methods.

An integrated triaxial shear and seepage experimental method for hydrate-bearing sediments and device thereof is provided, relating to the field of geotechnical experiments technologies. The method includes the following steps: generating hydrate; preparing a shear and seepage coupling experiment; and performing the shear and seepage coupling experiment. According to a special integrated experimental device, that coupling analysis of seepage and stress in a triaxial shear breakage process of the hydrate can be realized, and different experiments that are liquid seepage experiment and the gas-liquid seepage experiment can be realized.

Disclosed is a pressure-bearing device for simulating an excavation unloading test of a high-energy-storage rock mass. The pressure-bearing device comprises pressure-bearing blocks, a casing pipe and sealing rings, wherein the two pressure-bearing blocks are respectively arranged at two ends of a to-be-tested rock mass; the casing pipe can be arranged outside the to-be-tested rock mass and the pressure-bearing blocks in a sleeving mode and is attached to the to-be-tested rock mass and the pressure-bearing blocks; and the sealing rings are arranged outside the pressure-bearing blocks and the casing pipe in a sleeving mode, so that the sealing rings can be tightly pressed on the casing pipe and the pressure-bearing blocks through fastening elements. Further disclosed is a sealing method for simulating an excavation unloading test of a high-energy-storage rock mass.

A soil parameter required when civil engineering/mechanical simulations for various grounds are performed is appropriately determined. A parameter determination device determines a parameter of a particle model used in a ground analysis system. The parameter determination device includes a triaxial compression test numerical analysis unit configured to determine the parameter so that the adhesive force and the shear resistance angle of a virtual ground respectively match the adhesive force and the shear resistance angle of an actual ground with a predetermined accuracy, and a pull-out test numerical analysis unit configured to determine the parameter so that a ground reaction force coefficient of the virtual ground matches a ground reaction force coefficient of the actual ground with a predetermined accuracy.

A crushing system for large-size natural gas hydrate rock samples, which mainly includes a crushing and stirring control subsystem, crushing and stirring execution subsystem and hydrate preparation subsystem. Full automatic control to parameter acquisition and experimental process is achieved by utilizing modern automation technology, including the function of automatically crushing the large-size natural gas hydrate rock samples and also monitoring, collecting and storing the drilling pressure, the torque and the internal furnace pressure and temperature parameters during the crushing process in real time, to provide reliable guarantee for the follow-up researches on crushing mechanism, crushing efficiency, drilling parameter optimization, rock crushing ability evaluation of a crushing tool and the like of the large-size natural gas hydrate rock samples and necessary experimental verification means for optimization of on-site exploiting construction conditions of natural gas hydrate.

A stand-alone miniature in-situ multiaxial universal testing equipment, is disclosed herein. The device comprises a multi-axial loading fixture unit, a data processing unit, an image capturing unit, a data acquisition unit, motor unit, loading jaw, loading heads, displacement sensor, lighting unit and telecentric lens. The device is a stand-alone, in-plane, in-situ miniaturized multiaxial loading fixture that is capable of loading a wide variety of samples including but not limited to, metallic, ceramics and composites.. The loading fixture is capable of in-plane tension, in-plane compression in one-direction or two directions both independently and simultaneously and as well 4-point bending loading of the samples.

Disclosed is a pressure-bearing device for simulating an excavation unloading test of a high-energy-storage rock mass. The pressure-bearing device comprises pressure-bearing blocks, a casing pipe and sealing rings, wherein the two pressure-bearing blocks are respectively arranged at two ends of a to-be-tested rock mass; the casing pipe can be arranged outside the to-be-tested rock mass and the pressure-bearing blocks in a sleeving mode and is attached to the to-be-tested rock mass and the pressure-bearing blocks; and the sealing rings are arranged outside the pressure-bearing blocks and the casing pipe in a sleeving mode, so that the sealing rings can be tightly pressed on the casing pipe and the pressure-bearing blocks through fastening elements. Further disclosed is a sealing method for simulating an excavation unloading test of a high-energy-storage rock mass.

A method includes preparing a rocklike core sample for compressive testing, the rocklike core sample defining a longitudinal axis and having first and second axial ends. Preparing the rocklike core sample includes providing a throughhole in the rocklike core sample, the throughhole extending between a first opening at the first axial end and a second opening at the second axial end, wherein the first opening and the second opening are dimensioned differently. The rocklike core sample is mounted in a compressive testing apparatus, and a compressive test is performed on the rocklike core sample in the compressive testing apparatus. The compressive test includes compression in axial and radial directions. A related system includes a compressive testing apparatus and a sample preparation apparatus which prepares a rocklike core sample for compressive testing in the compressive testing apparatus, via providing a throughhole in the rocklike core sample.

A test apparatus and method for applying one or more tensile loads to a sample and for testing attributes of the sample exposed to the one or more tensile loads. The test apparatus includes a housing that has a plurality of interconnected sides that contain the sample during testing and provide a rigid support structure to offset the tensile loads applied to the sample. The test apparatus includes one or more force application assemblies that are each configured to apply a particular tensile load on the sample. Each of the force application assemblies includes an anchor for securing the sample to the housing, a connector attached to an opposite side of the sample from the corresponding anchor, and a tension rod assembly configured to apply the tensile load between the housing and the sample.