A device for testing samples of material in a fluid upstream of a pump of a fluid pumping installation and a pumping installation comprising such a device, the device comprising: a casing having one inlet opening for the fluid and one outlet opening for the fluid, the outlet opening fixed to the pump; and a perforated cartridge to contain the samples of material to be tested, the perforated cartridge being arranged in the casing between the inlet opening and the outlet opening.

The present invention improves the precision in observing cracks in rocks during a hydraulic fracturing test, improving a scientific understanding of the regular pattern of development cracks in of hydraulically fractured rocks. The technical solution includes: hydraulically fracturing the rock with aqueous solutions containing an interventional contrast-enhanced agent, forming hydraulically fractured cracks, wherein the difference in a mass attenuation coefficient / of x-rays between the cracks and the rock is improved by the interventional contrast-enhanced agent in the cracks, moreover, the difference in mass energy absorption coefficient .sub.en/ of x-rays between the cracks and the rock is improved, then the linear attenuation coefficient of the reception of the detector is changed, improving the imaging resolution for hydraulically fractured cracks in the rock.

The invention discloses a method for in vitro testing of specimens, such as biomaterials, to obtain history-dependent, time-invariant functional materials properties using time-convolution and idempotent analysis. The purpose of the method is to measure these properties using a data processing without limitations of materials models, the properties linearity or material homogeneity.

A method for determining an expansion coefficient of a test material comprises: receiving first image data of a compound material, wherein the compound material comprises a plate and a layer of the test material, which is attached to the plate; receiving second image data of the compound material, which has been exposed to an environmental condition, before the second image data has been recorded; determining a measured deformation of the compound material by comparing the first image data and the second image data; and performing a simulated deformation of a model of the compound material exposed to the environmental condition and determining the expansion coefficient of the test material by varying the expansion coefficient until the simulate deformation conforms to the measured deformation.

The disclosure provides a rock stratum grouting water blocking test device and method under a mining coupling condition, and relates to the technical field of permeability testing. The device includes a solution box, a test box, a pressing plate replacement box, a grouting pump, a recovery pool and a water pump, the solution box is connected with the test box through a liquid injection pipe, the bottom of the test box is connected with the pressing plate replacement box, the pressing plate replacement box is connected with a bottom plate, and the bottom plate is connected with a control panel. The device can be used for testing the influence of the single-factor or multi-factor coupling action of temperature, water quality, water pressure, water flow and grouting pressure on the grouting effect.

A method for enhanced interventional imaging for cracks, improving the precision in observing cracks in rock hydraulic fracturing test, benefiting for scientifically understanding regular pattern of development of hydraulically fractured cracks in rocks. The technical solution comprises: hydraulically fracturing the rock with aqueous solutions containing nanoscale interventional contrast-enhanced agent which has a high atomic number; forming hydraulically fractured cracks, wherein the difference in mass attenuation coefficient / of x-ray between the cracks and the rock is improved by the interventional contrast-enhanced agent in the cracks, moreover, the difference in mass energy absorption coefficient .sub.en/ of x-ray between the cracks and the rock is improved, then the linear attenuation coefficient of the reception of detector is changed, improving the imaging resolution for hydraulically fractured cracks in the rock.

A method for testing for hydrogen embrittlement, including mounting a container around a steel alloy test specimen, the container having a closed bottom below a notched area on the test specimen and an open upper end above the notched area; applying a tensile load to the test specimen and sustaining the load for a selected duration to incubate potential hydrogen embrittlement cracks with a sub-critical flaw size if sufficient hydrogen in dangerous levels is present in the test specimen; then, while sustaining the load, dispensing a cryogenic fluid into the container, immersing and chilling the notched area, reducing the sub-critical flaw size for any hydrogen embrittlement cracks incubated; and with the sustained load, fracturing the notched area if the sub-critical flaw size of any hydrogen embrittlement cracks incubated reaches a critical flaw size.

The disclosure provides a rock stratum grouting water blocking test device and method under a mining coupling condition, and relates to the technical field of permeability testing. The device includes a solution box, a test box, a pressing plate replacement box, a grouting pump, a recovery pool and a water pump, the solution box is connected with the test box through a liquid injection pipe, the bottom of the test box is connected with the pressing plate replacement box, the pressing plate replacement box is connected with a bottom plate, and the bottom plate is connected with a control panel. The device can be used for testing the influence of the single-factor or multi-factor coupling action of temperature, water quality, water pressure, water flow and grouting pressure on the grouting effect.

A stress corrosion crack test method for evaluating the stress corrosion crack susceptibility of a steel material in alcohol. The method includes filling a cell containing a uniaxial tensile test piece of the steel material with an alcohol solution containing carboxylic acid: 0.1 mmol/L or more and less than 40 mmol/L, chloride ions: 0.05 mg/L or more and less than 300 mg/L, and water: 0.1 vol. % or more and less than 5 vol. %. Additionally, the method includes applying a fluctuating stress at a frequency of 2.010.sup.5 Hz or more and 2.010.sup.2 Hz or less to the uniaxial tensile test piece in the tensile direction. The maximum stress being equal to or more than the yield strength and less than the tensile strength at a test solution temperature, and the minimum stress being 0% or more and 90% or less of the yield strength.

A system and method for determining adiabatic stress derivative of temperature for rocks under water. The system includes three pressure vessels disposed in seawater. A data collecting unit is in the first pressure vessel. A rock sample is in a first chamber of the second pressure vessel. A temperature sensor is in each of the center of the rock, the surface of the rock sample, and the first chamber. A pressure sensor is also in the first chamber. Outputs of the temperature sensors and the pressure sensor are communicated with inputs of the data collecting unit. A first drain valve is provided on the second pressure vessel and communicated with the first chamber. A second drain valve is provided between the second pressure vessel and the third pressure vessel, and communicated with the first chamber and the second chamber.