Connecting mechanism used for T type cuniform spread out load application sample prefabricated endurance crack
A connecting device and fatigue cracking technology are applied in the field of connecting devices for T-shaped wedge-shaped open-loaded specimens, which can solve the problems of complex processing procedures and high processing costs, and achieve simplified processing procedures, reduced processing costs, and saved processing time and materials. The effect of loss
Inactive Publication Date: 2008-03-12
ZHEJIANG UNIV OF TECH
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Problems solved by technology
[0005] In order to overcome the shortcomings of complex processing procedures and high processing costs in crack prefabrication when making qualified T-shaped wedge-shaped open loading samples, the present invention provides a method that simplifies processing procedures, saves processing time and material loss, and reduces processing costs. Connecting device for prefabricating fatigue cracks in T-shaped wedge-shaped open-loaded specimens
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[0020] The present invention will be further described below in conjunction with the accompanying drawings.
[0021] Referring to Figures 3 to 8, a connection device for prefabricating fatigue cracks in a T-shaped wedge-shaped open-loaded sample, the T-shaped wedge-shaped open-loaded sample includes a T-shaped sample 1, a Spacer holes 2 and internal threaded holes 3, the spacer holes 2 and internal threaded holes 3 are perpendicular to each other in space, and the connecting device includes U-shaped hooks 4, pins 5, upper cylindrical rods 6 and lower cylindrical rods 7. The opening end of the U-shaped hook 4 is provided with a mounting hole 8 that matches the pin 5, and the bottom end of the U-shaped hook 4 is provided with an internal thread 9, and the cylindrical rods 6, 7 include external threads. One end and the optical rod matched with the upper and lower chucks of the optical rod of the testing machine, the pin 5 passes through the spacer hole 2 on the T-shaped sample, a...
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The invention relates to a connecting device for a T-shaped wedge open loading test specimen prefabricated fatigue crack, which comprises a U-shaped hook, a pin, an upper cylindrical rod and a lower cylindrical rod, wherein the opening end of the U-shaped hook is provided with an installation hole matched with the pin, the bottom end of the U-shaped hook is provided with an internal thread, the cylindrical rod comprises one end provided with an external thread and an optical rod matched with an upper collet and a lower collet of the optical rod of a testing machine, the pin passes through a cushion block hole in a T-shaped test specimen, the pin is arranged on the opening end of the U-shaped hook, one end of the upper cylindrical rod is arranged in the internal thread of the bottom end of the U-shaped hook, and one end of the lower cylindrical rod is arranged in an internal thread hole of the T-shaped test specimen. The invention provides a connecting device for a T-shaped wedge open loading test specimen prefabricated fatigue crack, which simplifies the processing procedure, saves the processing time and the material loss, and reduces the processing cost.
Description
technical field [0001] The invention relates to a connection device for a T-shaped wedge-shaped opening loading sample used in a stress corrosion test. Background technique [0002] In recent years, due to the development of the theory of fracture mechanics and its successful application in stress corrosion tests, the use of prefabricated cracked samples for related stress corrosion tests has been developed, which not only saves test time, but also obtains effective stress corrosion tests of materials. data. [0003] The test content of the T-shaped wedge-shaped open-loaded specimen has been detailed in the standard GB / T15970.6-1998, but because the T-shaped wedge-shaped open-loaded specimen needs to prefabricate a fatigue crack of 2 to 2.5mm, and the prefabricated fatigue crack The method is not detailed in the standard, and one of the conventional fatigue crack prefabrication methods is to first process the material into a standard CT sample, as shown in Figure 1, and con...
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IPC IPC(8): G01N1/28
Inventor 张明锋邓凯邱宝象陈学东高增梁
Owner ZHEJIANG UNIV OF TECH