Device and method for testing mechanical properties of ceramic material under constraint condition

Abstract

The invention discloses a device and a method for testing the mechanical properties of a ceramic material under a constraint condition and belongs to the field of mechanical property test. The device comprises a force applying device, a constraining device and a data acquiring and processing system, wherein the force applying device comprises an alternating-current motor, a speed reducer, a firstsupporting bracket, a second supporting bracket, a supporting plate, a bearing, a coupler, a ball screw, a moveable nuts, a transmission platform, a force applying pressing head, a workbench, a firstpedestal and a first pressure sensor; the constraining device comprises a second pedestal, a first supporting plate, a second supporting plate, a baffle plate B, a loading component I, a loading component II and a second pressure sensor; the second pedestal of the constraining device is fixed on the workbench of the force applying device; and the data acquiring and processing system is respectively connected with the first pressure sensor and the second pressure sensor. According to the device, a stress is applied to the ceramic material by using a rigid material. The device is simple in structure, flexible, light and portable; and the test on the mechanical properties of the ceramic material is realized.

Description

technical field [0001] The invention relates to a device and method for testing the mechanical properties of ceramic materials under constraint conditions, and belongs to the field of testing mechanical properties of materials. Background technique [0002] The Achilles heel of ceramic materials is brittleness, low reliability and low repeatability. These deficiencies have seriously affected the wide application of ceramic materials. The brittleness of materials is mainly manifested in low fracture toughness. At present, the toughening of ceramic materials is mainly from the perspective of the material itself, by changing the composition, structure, structure, etc. to improve toughness, such as fiber / whisker toughening, phase transformation toughening, nano-toughening, etc. Although these toughening measures Some achievements have been made, but the effect is still not significant. In addition, advanced ceramic materials are more and more widely used in the field of ballist...

AI Technical Summary

Problems solved by technology

There are few related studies on how the mechanical properties of ceramic materials will change under prestressed constraints, and the corresponding changes in the mechanical properties (bending strength, fracture toughness) of ceramic materials under prestressed constraints device has not yet been reported

At the same time, the existing universal material testing machine has a complex structure and huge equipment, so a device with a simple structure, flexibility and lightness for testing the mechanical properties of ceramic materials is needed

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