Pinion-and-rack type biaxial tensile test device

Abstract

The invention discloses a pinion-and-rack type biaxial tensile test device. The device is characterized in that it includes an upper mould base, a lower mould base, and four synchronous tensile apparatuses located between the upper mould base and the lower mould base, the four synchronous tensile apparatuses are in cross-shaped distribution, the upper mould base and the lower mould base are connected by two guide apparatuses in diagonal arrangement, and the guide apparatuses are located between adjacent two of the synchronous tensile apparatuses. The upper mould base is fixed on a press machine. The pinion-and-rack type biaxial tensile test device provided by the invention has the advantages of convenient use, simple structure, low cost, small volume and the like, and can fulfill the requirements of biaxial tensile test.

Description

technical field [0001] The invention belongs to the field of testing mechanical properties of materials, and in particular relates to a rack-and-pinion bidirectional tensile testing device. Background technique [0002] For anisotropic materials, only using uniaxial tensile tests to obtain their mechanical properties cannot meet the requirements of engineering applications, especially for metal sheets with anisotropic characteristics. Due to rolling, the metal sheet has different mechanical properties along the rolling direction and perpendicular to the rolling direction. And the forming process of sheet metal is mostly completed under complex stress state. In order to meet the needs, a test device for testing the mechanical properties of plates under complex loading conditions has been developed. Biaxial tensile test device is one of the important ones. The bidirectional tensile test is a test process in which the cross specimen is stretched along the mutually perpendicu...

AI Technical Summary

Problems solved by technology

[0003] At present, test equipment suppliers such as MTS and Zwick have produced biaxial tensile testing machines that meet the test requirements, but due to their extremely expensive prices, they have not been purchased by most scholars.

Among the test equipment made by scholars, some require complex structures such as hydraulic control to meet the test needs; some require equipment such as motor drive, which is expensive; some equipment is large and not compact enough

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