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Tensile-shear preload in-situ indentation test device and method

A technology of tensile shear and preload, which is applied in the direction of testing material strength by applying stable shear force, testing material strength by applying stable tension/compression, testing material hardness, etc., and can solve problems such as the influence of material mechanical properties , to achieve the effects of simplified indentation module device, high practical value, precise mechanical test and in-situ observation

Active Publication Date: 2017-05-31
JILIN UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a tensile-shear preload in-situ indentation test device, which solves the above-mentioned problems in the prior art, especially solves the influence of different loads on the mechanical properties of materials under the condition that multiple loads act on the material at the same time impact issues

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  • Tensile-shear preload in-situ indentation test device and method

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Embodiment Construction

[0041] The detailed content of the present invention and its specific implementation will be further described below in conjunction with the accompanying drawings.

[0042] see Figure 1 to Figure 9 As shown, the tension-shear preload in-situ indentation test device of the present invention consists of four parts: a mechanical transmission module, an arbitrary-angle tension-shear composite loading module, a cantilever indentation module and a measurement module.

[0043] The mechanical transmission module includes a main frame 11, a primary worm gear 23 and a primary worm 22 provide a primary deceleration, a connecting rod 24, a secondary worm gear 26, and a secondary worm 28 provide a secondary deceleration, a secondary worm support frame a27, and a secondary worm The first-stage worm support frame b30, because the second-stage worm gear protrudes too long, the auxiliary support frame 25, the motor support frame 21 to increase its rigidity, the reducer 20 placed to obtain the...

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Abstract

The invention relates to a tension-shear preload based in-situ indentation testing device and method and belongs to the field of precision and scientific instruments. The device is characterized in that a mechanical drive module comprises a servo motor, two stages of worms and gears, a screw and screw nuts, rotation of the motor can be converted into rectilinear motion at a quasi-static rate, and a tension process is realized; an any-angle tension-shear combined loading module tightly presses a movable device on a base through friction force of bolts, and the load stress inclination of a test piece can be changed through change of the angle of the movable device; a cantilever indentation module realizes loading through a piezoelectric stack which is mounted above a cantilever beam and parallel to the cantilever beam, and the cantilever beam is extruded and forced to bend to realize indentation when the piezoelectric stack is powered and generates actuation. When a tension-shear combined test is performed, the device is placed under a microscope for in-situ observation. The tension-shear preload based in-situ indentation testing device has reliable principle, compact structure and higher practical value, and can perform tension-shear-indentation multi-load mechanics test of materials as well as in-situ observation accurately.

Description

technical field [0001] The invention relates to the field of precision scientific instruments, in particular to a tension-shear preload in-situ indentation test device and method. Background technique [0002] For a long time, among the many mechanical performance parameters of material mechanics testing, parameters such as elastic modulus, yield limit, strength limit, elongation and shear modulus are the most important test objects. There are many kinds of performance parameters for the above materials Test methods such as tension / compression, bending, torsion, tympanometry, and nanoindentation. However, many of the methods mentioned above are aimed at a single load, that is, a single test can only obtain a single performance parameter of the material, and each test method requires specific experimental instruments for testing, which is very cumbersome. [0003] In addition, because the existing testing instruments can only test a single mechanical property, it is impossib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/24G01N3/42
Inventor 赵宏伟李柠王顺博代晓航张世忠霍占伟刘阳苗淼
Owner JILIN UNIV
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