Patent
Micro-scale material shearing fatigue testing equipment based on ultrasonic vibration
Yan Lan,Jiang Feng,Wang Ningchang,Xu Xipeng +3 more
- 22 Apr 2015
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TL;DR: In this paper, a micro-scale material shearing fatigue testing equipment based on ultrasonic vibration is presented, which consists of a tested part, a tool head, a base system, an ultrasonic vibrational vibration system, a force measuring system and an acoustic emission system.
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Abstract: The invention discloses micro-scale material shearing fatigue testing equipment based on ultrasonic vibration. The equipment comprises a tested part, a tool head, a base system, an ultrasonic vibration system, a force measuring system and an acoustic emission system. The ultrasonic vibration system is installed on the base system, the tool head is fixedly connected to the ultrasonic vibration system, the acoustic emission system is connected to the tool head, the force measuring system is connected to the base system, and the tested part is fixedly connected to the force measuring system. The position of the tested part and the position of the tool head are adjusted through the base system. The tested part and the tool head achieve a shearing effect through the ultrasonic vibration system. Through the force measuring system, the dynamic changes of force between the tool head and the tested part are detected. Through the acoustic emission system, an acoustic emission signal when the tested part is damaged due to fatigue is detected. The high-frequency shearing fatigue characteristic of homogeneous material at a micro-scale can be analyzed in a quantified mode, and related testing results can be used for evaluating the corrosive-pitting capacity of a high-speed gear and the anti-stripping capacity of a tool coating and designing corresponding products.
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Citations
Patent
Testing device for testing impact resistance of coated tool
Liu Zhanqiang,Xu Peili,Cai Yukui,Zhuang Peng,Zhang Han,Wang Bing +5 more
- 21 Oct 2015
TL;DR: In this paper, the authors present a testing device for testing impact resistance of a coated tool, where the impact force signal form is single, the occupation ratio is fixed, the frequency is relatively low and the test table is larger in area when ballistic motion is realized by the conventional traction electromagnet and pneumatic device.
3
Patent
Method for measuring shear modulus and layer thickness of amorphous alloy surface layer and application
Jie Dong,Sun Bao'an,Bai Haiyang,Wang Weihua +3 more
- 28 Aug 2020
TL;DR: In this article, a method for measuring and calculating shear modulus and layer thickness of an amorphous alloy surface layer was proposed, which comprises the following steps of: measuring the diameter and the metering length of ammorphous alloy; and acquiring a torque-rotation angle curve by conducting a torsion experiment on the amorphus alloy, converting the torque- rotation angle curve into a surface shear stress-surface shear strain curve, and acquiring the shear modulation and the layer thickness, through utilizing the torque rotation curve and the surface shears stress
References
Patent
Method for testing high-frequency fatigue characteristic of material under microscale
Jiang Feng,Xu Xipeng,Wang Ningchang,Yan Lan +3 more
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Abstract: The invention discloses a method for testing a high-frequency fatigue characteristic of a material under microscale. The method comprises the following steps of (1) firmly connecting one end of a homogenous metal or non-metal test sample to an ultrasonic vibration generation device, and enabling the other end of the homogenous metal or non-metal test sample to be in contact with a diamond pressing head at a fixed position, wherein the diamond pressing head is connected with a high-precision force measurement system; (2) adjusting parameters of the ultrasonic vibration generation device to obtain vibration frequency f and amplitude A which need to be tested, generating ultrasonic vibration to enable the diamond pressing head to partially impact the homogenous metal or non-metal test sample so as to cause a high-frequency alternating load under a microscale; (3) measuring alternating impact force generated by vibration of the test sample through the high-precision force measurement system so as to calculate alternating stress on part of the test sample; (4) observing a fatigue damage condition of a region, which is in contact with the test sample, of the diamond pressing head at different times through a scanning electron microscope to obtain a fatigue intensity and alternating stress-circulating frequency curve of the material under microscale.
11
Patent
Hard alloy impact fatigue testing method
Hao Zhang
- 23 Dec 2009
TL;DR: In this article, a hard alloy impact fatigue testing method sequentially comprising of three steps is presented, namely, preparing a standard sample with a thin wall and in a cylinder shape, and a platform or a conical squeeze head, wherein the diameter of the bottom surface of the squeeze head is larger than the diameter diameter of a bore of the standard sample.
5
Patent
Method for carrying out fatigue tests on a sample body and test device
Johann Kollegger,Bernd Köberl,Herbert Pardatscher,Markus Vill +3 more
- 27 Apr 2006
TL;DR: In this paper, a method for carrying out fatigue tests on a test body (7) which, in order to increase the frequency of testing, in particular with high loading of the test body is characterised in that test body(7) is subjected to a static load by a system comprising a spring resistance and is additionally subjected to an oscillating load by means of an oscillation generator with generation of a closed force path in the system for static loading.
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