High temperature tensile fatigue test fixture for panel test piece and method
A fatigue test and test piece technology, which is applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problems of not considering high temperature test conditions and failing to meet the requirements of tensile fatigue test of flat test pieces. , to achieve the effect of high material performance
Active Publication Date: 2017-06-13
BEIHANG UNIV
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Problems solved by technology
The fixture design also does not consider the influence of high temperature test conditions
[0007] In summary, the existing technology cannot meet the requirements of the tensile fatigue test of flat specimens under high temperature conditions with large loads and high frequencies.
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[0040] The invention mainly designs high-temperature fatigue fixtures suitable for flat test pieces and capable of carrying out tensile tests. In fact, during the test, the whole set of fixtures includes two fixtures of the present invention, which are divided into upper fixtures and lower fixtures. The general diagram of complete installation is shown in Figure 13 .
[0041] The fixture includes the following parts: central shaft 1, left-handed nut 2, right-handed nut 3, sleeve rod 4, sleeve 5, connecting rod 6, wedge-shaped clamp body 7, guide table 8, wedge-shaped clamp block 9, countersunk head bolt 10, Block 11.
[0042] Among them, such as Figure 1-14 As shown, the static positional relationship between the various components is: the wedge-shaped clamp body 7 and the connecting rod 6 are threadedly connected, and the upper surface of the thick end of the connecting rod 6 is in contact with the lower surface of the wedge-shaped clamp body 7; The end passes through th...
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The invention discloses a high temperature tensile fatigue test fixture for a panel test piece and a method. The clamping for the panel test piece in a high temperature test is realized, so that the tensile fatigue test for the panel test piece can be performed under a high temperature condition. A hydraulic chuck of a fatigue machine is used for clamping an optical rod end of a central shaft and is connected with a connecting rod through a sleeve; a fixing nut is arranged on the central shaft; the fixing nut is used for limiting the downward movement of the sleeve; the connecting rod is fixed with the sleeve through a screw; the connecting rod is in threaded connection with a wedge-shaped chuck body; the central shaft passes through a through hole in the middle of the connecting rod; a shaft end is connected with a guiding platform; the guiding platform is located in a groove between two wedge-shaped clamp blocks and is used for guiding the wedge-shaped clamp blocks to move up and down; the test piece is clamped by the wedge-shaped clamp blocks in the wedge-shaped chuck body; the bottoms of the wedge-shaped clamp blocks are propped by the top end of the guiding platform; the two sides are in contact with the wedge-shaped plane in the wedge-shaped chuck body; the upwards movement of the wedge-shaped clamp blocks is limited. The high temperature tensile fatigue test fixture can meet the requirement for stably clamping the panel test pieces in various sizes and can realize the single-shaft tensile fatigue under the high temperature condition.
Description
technical field [0001] The invention relates to metal material fatigue performance testing equipment, in particular to a high-temperature tensile fatigue test fixture and method for flat specimens, and belongs to the field of design and manufacture of metal material uniaxial high-temperature tensile fatigue test fixtures. Background technique [0002] For the test requirements that require high temperature, large load, high frequency, and repeated tension, ordinary wedge-shaped fixtures cannot meet the test requirements, because there are few such fixtures that consider the test conditions of high temperature and high load at the same time. Fatigue failure tends to occur first in high temperature fatigue tests. After reviewing the existing patent documents, no high-temperature fixture for flat specimens that can solve the above problems has been found. Therefore, it is necessary to design a high-temperature tensile fatigue test fixture suitable for flat specimens. [0003] ...
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IPC IPC(8): G01N3/04G01N3/18
CPCG01N3/04G01N3/18
Inventor 胡殿印王荣桥李达马琦航刘辉
Owner BEIHANG UNIV
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