Compact tensile sample creep-fatigue crack propagation testing device

Abstract

The invention discloses a compact tensile sample creep-fatigue crack propagation testing device. The compact tensile sample creep-fatigue crack propagation testing device comprises a main shaft assembly, an upper chuck assembly and a lower chuck assembly are arranged at one end of the main shaft assembly, and a load linear displacement measurement assembly is arranged at the other end of the main shaft assembly. The upper chuck assembly is in threaded connection with a high-temperature pull rod of a fatigue-creep tester, the main shaft assembly comprises an upper connecting rod and a lower connecting rod, and the upper connecting rod and the lower connecting rod are coaxial. An axial guide rail is arranged at the lower end of the lower pull rod, and the lower chuck assembly is in threaded connection with the upper connecting rod. The load linear displacement measurement assembly comprises two fixing assemblies of the same structure and two measurement assemblies of the same structure, wherein the two fixing assemblies of the same structure and the two measurement assemblies of the same structure are symmetrically arranged on the two sides of the main shaft assembly respectively. Through the device, a compact tensile sample can be fixed, load linear displacement data in creep-fatigue crack propagation can be measured, and the clamp is compact and simple in structure and convenient and flexible to use and is matched with an existing tester well.

Description

technical field [0001] The invention relates to the field of high-temperature performance detection of a material, in particular to a crack growth test device under the creep-fatigue interaction of a compact tensile sample. Background technique [0002] At present, with the rapid development of China's economy, the demand for energy is getting higher and higher, and the environmental pollution is also increasing. Therefore, improving energy utilization efficiency, developing new energy sources, and reducing harmful gases and greenhouse gas emissions have become economically sustainable. An important support point for development. While developing new energy sources, improving the operating parameters of industrial devices is the most effective means to improve the efficiency of existing energy use and material conversion efficiency. Therefore, high-energy industries such as thermal power, nuclear power, petrochemicals, and oil refining are all developing towards high temper...

AI Technical Summary

Problems solved by technology

At present, there are relatively few test devices related to creep-fatigue in China, especially for accurate measurement of load line displacement and other parameters.

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