High-temperature and low-temperature fatigue test apparatus suitable for thin fatigue specimen plate

Abstract

The invention discloses a high-temperature and low-temperature fatigue test apparatus suitable for a thin fatigue specimen plate, and belongs to the technical field of fatigue detection for a material. The apparatus includes a thin fatigue specimen plate, a contact head, shaft connecting rods, necks, clampers, a heating furnace and a fatigue testing machine. The shaft connecting rods are connectedto the fatigue testing machine via the clampers; the necks are in interference fit to the holding ends of the thin fatigue specimen plate; the whole holding ends of the thin fatigue specimen plate are inlaid in the necks for efficiently holding and fixing a specimen; and after the thin fatigue specimen plate is put in the necks, a cover cooperates with a fixing pin and bolts to fix and clamp thethin fatigue specimen plate in the necks and to prevent the specimen from loosing and sliding in a high-cycle fatigue process. The apparatus is simple in structure, the specimen is easy to be installed and held, and high-temperature and low-temperature tensile-tensile fatigue tests and static tensile tests can be carried out. The problems that a test clamper cannot efficiently hold a thin fatiguespecimen plate with the thickness in a range of 1-3 mm at a high temperature and a fatigue specimen is easy to loose at a high temperature in the prior art are solved.

Description

Technical field: [0001] The invention belongs to the technical field of material fatigue detection, and in particular relates to a high-low temperature fatigue test device suitable for thin plate fatigue samples. Background technique: [0002] Fatigue damage is the most common failure mode in the service of materials and workpieces. It is particularly important to prevent fatigue damage and evaluate the remaining service life of equipment. When metal materials are served under high temperature conditions, their fatigue damage is especially serious. The high-temperature fatigue test of metal materials is the basis for material performance evaluation and structural service safety evaluation. Sheet thickness (1-3mm) has a wide range of applications in automotive, machinery, chemical, aerospace and other fields. The high-temperature fatigue test of the thin plate fatigue sample is different from the conventional round bar sample. Because of its small cross-sectional area and s...

AI Technical Summary

Problems solved by technology

The high-temperature fatigue test of the thin plate fatigue sample is different from the conventional round bar sample. Because of its small cross-sectional area and small force, it is not easy to clamp. During the fatigue process, the clamping end of the fatigue sample is easy to break and relax. Affect the conduct of test experiments and the accuracy of test results

Existing fixtures for thin plate fatigue specimens cannot meet the requirements of the test

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