A large biaxial in-situ in-plane transmission fatigue testing machine

Abstract

The invention belongs to the field of mechanical property testing for materials, and discloses a large biaxial in-situ in-plane transmission type fatigue tester, which comprises an X-axis module and a Y-axis module with the same structure, and each of the X-axis module and the Y-axis module comprises a motor, a coupling, a first synchronous belt pulley, a synchronous belt, a second synchronous belt pulley, a left-handed and right-handed rotation ballscrew, a crossbeam, a fixture, a load sensor, a grating ruler, and a grating ruler reading head; each part in the internal X-axis module (or Y-axis module) is arranged in a space defined by the crossbeam and the left-handed and right-handed rotation ballscrew in the external Y-axis module (or X-axis module); and the crossbeam and the fixture in the external Y-axis module (or X-axis module) are connected with each other by adopting a door-shaped support, so that the left-handed and right-handed rotation ballscrew in the internal X-axis module (or Y-axis module) passes through the middle of the door-shaped support. The large biaxial in-situ in-plane transmission type fatigue tester has the advantages of high precision, long travel, high safety and wide load range, and can cooperate with a microcosmic observation instrument to carry out the in-situ measurement on microstructure changes in a material under the action of uniaxial and biaxial loads.

Description

technical field [0001] The invention belongs to the field of testing mechanical properties of materials, and in particular relates to a fatigue testing machine. Background technique [0002] In the past, the research on material mechanics mostly focused on the state of uniaxial loading. However, in practical engineering applications, materials are widely in a state of composite stress. During the roll forming process, it is subjected to compound stress, etc. In order to accurately describe the mechanical properties of materials, a series of in-plane biaxial mechanical tests such as biaxial tension, biaxial compression, and biaxial tension and compression fatigue are required. However, there are still relatively few in-situ in-plane bidirectional loading devices with large loads on the market that can perform tension-compression cyclic loading. [0003] At the same time, the microscopic observation methods of materials are very rich, including various optical microscopes, s...

AI Technical Summary

Problems solved by technology

Traditional in-situ testing instruments mostly adopt a mechanical structure with upper and lower layouts, which makes it impossible to observe the lower surface of the sample, and test methods such as X-rays or neutrons cannot penetrate the sample for in-situ testing

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