Test device and test method for measuring mechanical properties of lap joint samples

Abstract

The invention relates to a test device and a test method for measuring mechanical properties of lap joint samples. The test device comprises two clamps used for clamping the lap joint samples, two cover plates used for fixing the lap joint samples on the clamps, two loading heads used for connecting the test device and experimental equipment, four kinds of lap joint samples and a set of connecting bolt and pin. The test method comprises the following steps: clamping to-be-measured lap joint samples by virtue of the two clamps in a matching manner, connecting the clamps with the test equipment by virtue of the loading heads, loading, and testing the shear resistance, bending resistance, torsion resistance or tensile mechanical properties of the samples. With the adoption of the general design idea, the tensile properties, shear resistance, bending resistance and four-angle KSII of the lap joint samples can be tested, the device is applied to the lap joint samples of three different connection types and has extremely high universality, and the cost of the clamps is reduced.

Description

technical field [0001] The invention relates to a test device, in particular to a test device and a test method for measuring the mechanical properties of lap joint samples, which can be used to determine the failure of solder joints, structural glue and glue welding in tensile, bending, torsion and shear tests stress. Background technique [0002] Spot welding, glue bonding and glue welding are three commonly used lap joint methods, which have the characteristics of low cost and high efficiency. The lap joint structure has the advantages of low quality, high strength and high stability, and has been widely used in the field of industrial automation. Especially the connection of car body. Lap joint structures are mainly subjected to typical loads such as tensile force, shear force, bending moment, and torque. Under the action of a single load or multiple loads, the lap joint structure will be scrapped due to premature failure, and even cause serious accidents. With the con...

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Problems solved by technology

[0003] The publication number is CN 102645382A invention patent (test method for measuring spot welding shear strength and its special test device), which discloses a method for measuring the maximum torsional moment of cross spot welding specimens when torsion and special The test device, and the structure of the device is relatively complicated, it is not easy to realize

In the prior art, the method and device for measuring welding performance parameters of spot welding samples are only suitable for a certain type of load, and the operation method is relatively complicated and difficult to implement, and the test accuracy is limited to a certain extent

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