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Test fixture for tensile test of viscous-elastic materials under micro scale and test method

A technique for tensile testing and testing fixtures, which is applied in the analysis of materials, strength characteristics, and the use of repeated force/pulsation force to test the strength of materials, etc., and can solve the problems of inability to accurately measure viscoelastic constitutive parameters.

Inactive Publication Date: 2019-04-09
SOUTHEAST UNIV
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Problems solved by technology

[0003] Technical problem to be solved: This application mainly proposes a viscoelastic material tensile test fixture and test method at a microscopic scale, which solves technical problems such as inability to accurately measure viscoelastic constitutive parameters in the prior art, and provides a Tensile test fixture and test method for viscoelastic materials at microscopic scale

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  • Test fixture for tensile test of viscous-elastic materials under micro scale and test method

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Embodiment 1

[0029] Such as figure 1 and figure 2 As shown, the test fixture for the tensile test of viscoelastic materials at the microscopic scale is composed of the main mold 1, the recessed material pouring area 2, the prefabricated crack module 3, the prefabricated crack needle point 4, the chassis 6 and the chassis clamping groove 5, and the main mold (1 ) size is 69.8mm in length, 19.6mm in width and 10mm in height. The chassis 6 is provided with a set of chassis slots 5, and the main body mold 1 is provided with a gap used in conjunction with the chassis slots 5. The main body mold 1 is installed and fixed on the chassis 6 through the chassis slots 5, and the middle of the top surface of the main body mold 1 The part is formed by mechanical wire cutting to form a hollowed-in recessed material pouring area 2, and the non-inset material pouring area on both sides is used for clamping of the wedge-shaped fixture of the SEM-serve equipment to ensure sufficient contact between the mai...

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Abstract

The invention discloses a test fixture for tensile test of viscous-elastic materials under a micro scale and a test method. The test fixture comprises a main body mould, an invagination type materialpouring area, a prefabricated crack module, a prefabricated crack pinpoint and a chassis. The preparation process of a tensile test under the micro scale comprises the steps of drying and heating of the mould, high-temperature melting and pouring of a viscous-elastic material, set injection of a prefabricated crack, pretreatment of a micro tensile test piece, demolding of an assembly, and test andobservation under SEM-serve equipment. On the basis of the prepared mould and the test method, tensile mechanical test of materials with viscous-elastic features under the micro scale can be completed on the basis of the SEM-serve equipment so as to obtain mechanical indexes.

Description

technical field [0001] The invention relates to a test fixture and a test method for a tensile test of a viscoelastic material at a microscopic scale, and belongs to the technical field of road engineering. Background technique [0002] In road engineering, many road materials have viscoelastic properties, such as matrix asphalt, mortar, various modified asphalt, resin additives, etc. At present, the type I crack tensile test of solid structures can be realized, but for For materials with viscoelastic properties, how to measure their fracture behavior under tension has not been developed yet. This is because the forming structure of viscoelastic materials is extremely difficult, and under the influence of temperature, its physical properties vary greatly. In most temperature ranges, the formed structure of viscoelastic materials is not stable, and it is easy to cause large deformation and segregation. , which poses an important challenge to the structural testing of visco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04G01N3/08G01N3/32
Inventor 马涛丁珣昊顾临皓徐光霁吴少鹏肖月
Owner SOUTHEAST UNIV
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