A system for testing fatigue performance of material in low-temperature liquid hydrogen environment, which relates to the technical field of mechanical property test platforms, includes a jacket cover. A hydrogen sensor is provided at the top of and within the jacket cover; a rack, a liquid hydrogen tank and a liquid nitrogen tank are provided in the jacket cover; a loading mechanism and a liquid hydrogen containing mechanism are provided on the rack, the loading mechanism is connected to the rack, and the bottom of the loading mechanism extends into the liquid hydrogen containing mechanism; the liquid hydrogen tank and the liquid nitrogen tank both communicate with the liquid hydrogen containing mechanism; and the loading mechanism is configured for providing tension or pressure to a sample. The liquid hydrogen containing mechanism is provided with a cooling channel located around a sealing gasket, the cooling channel communicates with a thermostat.

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.

A test fixture for securing a test article is disclosed. The test fixture comprises a frame, an upper grip, a lower grip, a tensioner assembly, and a cooling assembly. The frame defines an upper portion and a lower portion, where the lower portion of the frame is configured to be releasably mounted to a vibration device. The upper grip is connected to the upper portion of the frame and the lower grip is connected to the lower portion of the frame. The upper grip is configured to secure an upper portion of the test article along an upper interface, and the lower grip is configured to secure a lower portion of the test article along a lower interface. The tensioner assembly is located at the upper portion of the test fixture. The cooling assembly transports a cooling medium across at least one of the upper interface and the lower interface.

The invention relates to a test system for cooling and/or heating at least one test piece comprising a platform, at least one heating and/or cooling fluid providing means coupled to the platform, at least one position means for reproducibly fixing the relative position of the fluid providing means to the at least one test piece and wherein the at least one position means is connected to the platform, the platform comprising at least one fastening means, in particular two openings for releasable coupling the fluid providing means for an at least temporarily fixing of the relative position of the fluid proving means to the test piece. It also relates to a test method.

Various implementations described herein include methods and systems for characterizing material properties at cryogenic temperatures that are suitable for studying epoxy and metal interfaces. One implementation include a mold for forming composite samples for a pullout test. Various other implementations include a method of forming a composite sample for a pullout test.

A wide-temperature-range uniaxial and biaxial compression test device in a high-pressure hydrogen environment is provided. An upper computer is interacted with a temperature sensor, a gas pressure sensor, test pressure sensors, displacement sensors, an oxygen/hydrogen concentration monitor, a hydrogen filling system, a vacuum extraction system, a DIC test system, and the other components. The upper computer is used to achieve high-pressure hydrogen environment wide-temperature-range uniaxial and biaxial compression test based on different test modes. Tested engineering stress-strain data is processed to obtain real stress-strain data of rubber, and then the real stress-strain data is processed through a corresponding database to screen out a constitutive model capable of best characterizing the nonlinearity of the rubber specimen. Meanwhile, a strain distribution nephogram generated by a test result of a sample material can be analyzed, thus obtaining a deformation behavior and a failure fracture mechanism of the sample material.

Erosion test rigs are provided for propelling dust and/or particles at high velocity and providing variable temperature ranges, as well as methods of using and fabricating the same. The erosion test rig can propel dust and/or particles at a velocity of up to 400 meters per second (m/s) and generate wide temperature ranges (e.g., from 196 C. to 200 C.) to simulate the harsh erosive conditions of planetary environments (e.g., Mars and Luna).

The disclosure provides a device and a method for testing mechanical properties of a material under a high rotation speed and a high temperature. A sample chuck is installed on a main shaft of a centrifugal machine and rotates synchronously. A test sample is installed on the sample chuck. The induction heating system is installed on the centrifugal machine and does not rotate. The induction heating system is connected to a circulating water cooling system. A temperature controlling system is connected to the circulating water cooling system and the test sample. Parameters of the centrifugal machine, the test sample, etc. are determined. A temperature-controlling thermocouple and a strain gauge are installed on a standard section. A rotation speed of the centrifugal machine reaches the speed and is maintained until it breaks. Data is collected, and then the centrifugal machine is turned off and air-cooled to a room temperature.

A testing method for layered strength of Roebel single-strands is provided, which relates to the field of material strength testing technologies. The testing method includes: preparing multiple Roebel single-strands as multiple testing samples; preparing multiple anvil heads, and welding the multiple anvil heads and the multiple testing samples in one-to-one correspondence to obtain multiple samples for anvil tensile testing; performing a tensile test on each sample for anvil tensile testing based on a set temperature and a set test position, and calculating peak load data of each sample for anvil tensile testing in the tensile test; calculating strength values of the multiple Roebel single-strands based on the peak load data of each sample for anvil tensile testing, and fitting the strength values based on a Weibull distribution function to obtain strength statistical characteristics; and calculating strength degradation data of each of the multiple Roebel single-strands based on the strength statistical characteristics.

The present invention relates to a cryogenic chamber for impact testing, which comprises in one aspect a container having a sidewall formed by at least two layers and an upper side opened, wherein the sidewall includes a first sidewall and a second sidewall shaped to surround the first sidewall, the first sidewall partitions a first space in which a specimen may be arranged, the second space partitions a second space to perform thermal insulation treatment between the first sidewall and the second sidewall, the second space has a structure in which the upper side is closed, and a first cooling medium is continuously supplied to the second space, thereby blocking heat transfer between the first space and the outside, while a second cooling medium is continuously supplied to the first space, thereby cooling the specimen.