Multi-amplitude ultrasonic pulling-twisting testing device for testing mechanical properties of hard and crispy materials

Abstract

The invention provides a multi-amplitude ultrasonic pulling-twisting testing device for testing mechanical properties of hard and crispy materials. The multi-amplitude ultrasonic pulling-twisting testing device comprises a supporting frame, an upper connector, a lower connector and an ultrasonic vibration system, wherein the ultrasonic vibration system is arranged on the supporting frame; the upper connector is arranged at the upper end of the supporting frame and the lower connector is located below the supporting frame; a rod-shaped test sample is clamped between the lower end of the ultrasonic vibration system and the lower connector; the test sample is vertically arranged; and a strain measurement plate is arranged on each of the upper side and the lower side of the middle position of the test sample. The multi-amplitude ultrasonic pulling-twisting testing device has the advantages of strong visibility, reasonable structure, flexibility and simplicity in operation, good effect and convenience for detachment. The multi-amplitude ultrasonic pulling-twisting testing device can realize a multi-amplitude ultrasonic vibration test; in a testing process, the deformation amount of the hard and crispy materials under the ultrasonic effects can be conveniently measured, and the strain measurement plates are arranged on the upper side and the lower side at the center of the test sample; and the microscopic deformation amount of the test sample under the ultrasonic vibration can be measured through the strain measurement plates and certain theoretical foundations are laid on the machining of the hard and crispy materials.

Description

technical field [0001] The invention belongs to the technical field of hard and brittle materials testing, in particular to a multi-amplitude ultrasonic tension and torsion test device for testing the mechanical properties of hard and brittle materials. Background technique [0002] Ceramic materials are widely used in many fields. But its most fatal weakness is its high fragility and low reliability, which limits its application in many occasions. How to improve this weakness of ceramic materials has always been a concern of ceramic material researchers. In the 1980s, composite ceramics made great contributions to the development of ceramic engines. The research of nano-ceramics followed, and by the early 1990s, the research trend of design and preparation of nano-ceramics, composite ceramics and ceramic materials had been formed. The inevitable grain recrystallization of ceramic materials during high temperature treatment brings obstacles to the preparation of single-ph...

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Problems solved by technology

[0007] In order to solve the problems existing in the prior art, such as the influence of ultrasonic frequency and ultrasonic amplitude on the fracture toughness of ceramic materials, and the influence of ultrasonic action on the microstructure, crystal lattice, and fatigue fracture strength and life of ceramic m

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