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Clamping mechanism of testing device for direct tensile strength of fragile material

A technology of tensile strength and testing equipment, applied in measuring equipment, using stable tension/compression to test material strength, analyzing materials, etc., can solve problems such as specimen damage, achieve improved clamping, and avoid bending and twisting Effect

Inactive Publication Date: 2015-02-04
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But for testing of brittle materials such as ceramics or resins, this type of test setup can cause the specimen to fail at very low tensile forces

Method used

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  • Clamping mechanism of testing device for direct tensile strength of fragile material
  • Clamping mechanism of testing device for direct tensile strength of fragile material
  • Clamping mechanism of testing device for direct tensile strength of fragile material

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0021] Such as figure 1 As shown, the present invention includes an upper clamping part and a lower clamping part, and the upper clamping part includes an upper wedge clamp 2, an upper ring 3, an upper cylindrical pin 4 and an upper cylinder 5, and the upper wedge clamp 2 passes through the upper circle The ring 3 is suspended on the upper cylindrical pin 4 of the upper cylinder 5, and the upper cylindrical pin 4 is installed on the pin hole of the upper cylinder 5, and the upper cylinder 5 and the upper pull rod 11 of the testing machine are connected by threads; The components include a lower wedge clamp 6, a lower ring 7, a lower cylindrical pin 8 and a lower cylinder 9. The lower wedge clamp 6 is connected to the lower cylindrical pin 8 of the lower cylinder 9 through the lower ring 7, and the lower cylindrical pin 8 is installed on the lower cylinder. O...

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Abstract

The invention discloses a clamping mechanism of a testing device for the direct tensile strength of a fragile material. The clamping mechanism comprises an upper clamping component and a lower clamping component, wherein the upper clamping component comprises an upper wedge-shaped clamp (2) which is hung on an upper cylindrical pin (4) of an upper cylinder (5) through an upper circular ring (3), the upper cylindrical pin (4) is mounted on a pin hole of the upper cylinder (5), and the upper cylinder (5) is connected with an upper pulling rod (11); the lower clamping component comprises a lower wedge-shaped clamp (6) which is connected to a lower cylindrical pin (8) of a lower cylinder (9) through a lower circular ring (7), the lower cylindrical pin (8) is mounted on a pin hole of the lower cylinder (9), and the lower cylinder (9) is connected with a lower pulling rod (10) of a testing machine. The clamping mechanism has the advantages that a test piece is prevented from being bent and distorted in the direct tensile process of the fragile material, and the clamping of the wedge-shaped clamps to the test piece is improved; the clamping mechanism is applicable to indoor temperature testing, high temperature testing and low temperature temperature.

Description

technical field [0001] The invention relates to a solid material tensile strength testing device, in particular to a clamping mechanism of a brittle material direct tensile strength testing device. Background technique [0002] There are direct test method and indirect test method for the test of material tensile strength. Indirect test methods commonly used are three-point bending test and four-point bending test. In some cases, the tensile strength measured by indirect testing methods does not reflect the true strength of the material. In addition, at high temperature, the tension-compression anisotropy of the material is obvious, and the neutral plane of the specimen will move to the compression side, so the tensile strength measured by the indirect method is quite different from the real value; the three points of material mechanics at high temperature The correction of calculation formulas for bends and four-point bends is still an unresolved problem. Therefore, it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04G01N3/08
Inventor 成天宝李卫国麻建坐李定玉王如转寇海波张如炳方岱宁
Owner CHONGQING UNIV
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