Test device and test method for tangential freezing strength test of material
A testing device and strength testing technology, applied in the direction of measuring devices, analyzing materials, using mechanical devices, etc., can solve the problems of freeze-stick interface rupture, test result error, shear critical force error, etc., to avoid extrusion force, Guaranteed sealing performance, easy processing and installation
Active Publication Date: 2019-10-18
COMAC +1
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[0004] However, the disadvantage of the above method is that there is a certain height difference between the actual point of application of force on the water cup and the frozen-bonded interface. When the pull-off test is carried out, the frozen-bonded interface is also subjected to a certain bending moment in addition to the tangential force. Therefore, there is a certain error between the final critical force and the shear critical force of the actual interface
[0006] However, the limitation of the above-mentioned method is: the columnar cylinder is a closed space, and in the process of freezing the water in the closed space, the gradual expansion of the volume will cause an extrusion force to shear the pull rod, and this force may Lead to premature rupture of the frozen-bonded interface, which causes a large error in the test results
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[0032] Below, refer to Figure 1 to Figure 4 The structure of the testing device 100 for the material tangential freezing strength test of the present invention will be described.
[0033] Such as figure 1 As shown, the test device 100 of the material tangential freeze bond strength test of the present invention comprises: a test piece 110; two cylindrical half bodies 120-a, 120-b; a bottom plate 130; and two support members 140-a, 140 -b.
[0034] The two cylindrical halves 120-a, 120-b and the bottom plate 130 are assembled to form the freezing chamber S.
[0035] The test piece 110 is, for example, a bar-shaped aluminum compression shear bar with a main body. One end of the test piece 110 can extend into the freezing chamber S, and can be inserted into the circular hole 131 provided at the center of the bottom plate 130. The circular hole 131 The inner wall is in contact with the outer peripheral surface of one end of the test piece 110 , and a cylindrical pressed piece ...
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The invention relates to a test device and a test method for a tangential freezing strength test of a material. Surface tangential freezing strength of the material can be measured reliably, and testaccuracy is not affected by other external conditions. The test device (100) for the tangential freezing strength test of the material comprises a bottom plate (130) and multiple freezing cavity components, wherein the bottom plate (130) and the multiple freezing cavity components are assembled to form a freezing cavity (S) allowing a test piece (110) to insert and test the tangential freezing strength of the material.
Description
technical field [0001] The invention relates to the field of ice adhesion performance testing, in particular to a testing device and a testing method for a material tangential freezing adhesion strength test. Background technique [0002] The freezing adhesion between ice and different material surfaces in cold regions will bring huge economic losses and even casualties to many fields such as aviation flight, road traffic, coal mine transportation, and power transmission lines. It can provide certain basis and guidance for the anti-icing and de-icing of material surface. [0003] Non-Patent Document 1 ("Experimental Research on Frozen Adhesive Properties of Frozen Surfaces" Ding Jinbo, Shanghai Jiaotong University, 2012) designed a method for testing tangential frozen adhesive strength tests based on the direct cutting method. In this method of tangential freezing adhesion strength test, the water cup filled with water and the sample are frozen and glued together in a refri...
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IPC IPC(8): G01N19/04
CPCG01N19/04
Inventor 周峰赵克良刘畅周光明邵纯刘佳
Owner COMAC