A rotatable double-layer plate tensile test device

Abstract

The invention discloses a rotatable double-layer plate tensile test device, which comprises two oppositely arranged force application seats, the force application seats are rigid bodies, the force application seats include a base and a fixed end, the fixed end is connected with one end of the base, and the fixed end It can be connected with the tensile testing machine. The top of the base is equipped with clamping components. The number of clamping components is consistent with the number of force-applying seats and corresponds one by one. The clamping components are rotatably arranged on the base; the clamping components include samples The stage and the cover plate, the sample stage is rotatably connected with the base, the sample is arranged between the cover plate and the sample stage, an adhesive layer is arranged between the sample stage and the sample, and between the cover plate and the sample. The invention avoids processing such as punching and grinding on the sample, avoids sample crushing caused by too tight clamping of the sample, or slips of the sample caused by too loose clamping, and uses the rotatable sample stage and the cover plate to clamp the sample. On the upper and lower sides, an adhesive layer is set at the same time, so that the brittle rock sample is not affected by the bending moment in any direction.

Description

technical field [0001] The invention relates to the technical field of tensile tests, in particular to a rotatable double-layer plate tensile test device. Background technique [0002] Tensile testing refers to a test method for determining the properties of a material under an axial tensile load. The data obtained from the tensile test can determine the elastic limit, elongation, elastic modulus, proportional limit, area reduction, tensile strength, yield point, yield strength and other tensile performance indicators of the material. [0003] The Chinese patent with the publication number CN102384875A discloses a test device for mechanical properties of materials in a microscope pull-down compression-bending composite load mode. It uses a test device that is clamped and clamped by mechanical equipment. Small-sized brittle rock samples are small in size and easy to break , The strength is low, the clamping force is small, the sample cannot be clamped and it is easy to slip,...

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Problems solved by technology

[0004] In addition, the existing technology does not have any calibration measures during the sample loading process, which cannot ensure that the direction of the tensile force applied by the tensile testing machine is parallel to the original tensile direction of the sample, and an in-plane bending moment parallel to the direction of the upper and lower surfaces of the sample is generated, resulting in experimental results Inaccurate

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