A mechanical connection structure shear performance testing device and testing method thereof

Abstract

The invention belongs to the field of mechanics performance testing of a mechanical connection structure, and provides a device for testing a mechanical connection structure shearing property and a test method thereof. Two technical problems can be solved according to the invention: the tensile (compression) / shear composite load (adjustable load ratio) of a mechanical connection structure can be realized, and the symmetry and the stability of the load are ensured. The device concretely comprises two loading joints (1) of a testing machine, two long beams (2), two short beams (4), two sliding rails (5) and two connectors (6) of a test piece, wherein the two long beams (2) and the two short beams (4) are connected to form a parallelogram structure in a rotating manner; two rotary junctions symmetrical at the center of the parallelogram structure are respectively connected with the loading joints (1); the two long beams (2) are fixedly provided with the sliding rails (5) respectively, each connector (6) of the test piece corresponds to one sliding rail (5), and is slidably connected with the sliding rail (5) in a matching manner.

Description

technical field [0001] The invention belongs to the field of mechanical performance testing of mechanical connection structures and provides a shear performance testing device for mechanical connection structures. Background technique [0002] Shear properties are an important part of the mechanical properties of materials, so it is necessary to design test devices and methods to test and characterize the shear properties of materials. Taking composite materials as an example, the ASTM standard test method can be used for the shear performance test of materials, but this method is only suitable for the pure shear performance test of small samples. [0003] In the design of aircraft structure, the wing spar bears both shear load and bending load. This subjects the spar web to combined tension / shear or compression / shear loading. Bolts are usually used for mechanical connection at the spar sections. At this time, it is necessary to test the shear performance of the mechanical...

AI Technical Summary

Problems solved by technology

[0009] (1) It is impossible to realize the combined loading of tension (compression) / shear (the loading ratio can be adjusted);

[0010] (2) When the thickness or modulus of the two parts to be connected is inconsistent, the test piece cannot be loaded stably and symmetrically

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