Clamping device for mechanical test of rectangular plate simply supported and restrained at four sides

Abstract

The invention relates to a clamping device for a mechanical test of a rectangular plate simply supported and restrained at four sides, and belongs to the technical field of clamping devices for the mechanical test of rectangular plates. The device comprises straight-edge brackets, an incomplete cylinder I, an incomplete cylinder II, corner brackets, a right-angle incomplete cylinder I, a right-angle incomplete cylinder II, compression bolts and adjusting nuts. The incomplete cylinder I and the right-angle type incomplete cylinder I are correspondingly installed on the straight-edge bracket and the corner bracket through the compression bolts and the adjusting bolts, and the incomplete cylinder II and the right-angle type incomplete cylinder II are correspondingly and fixedly installed on the straight-edge bracket and the corner bracket. A hollow cuboid for clamping the rectangular plate is formed by connecting the straight-edge brackets and the corner brackets. The device is simple in structure, the rectangular plates are convenient to assemble and disassemble, universality is high, clamping of the rectangular plates with different thicknesses, lengths and widths can be achieved, and good application prospects are achieved.

Description

technical field [0001] The invention relates to a clamping device for mechanical testing of a four-sided simply supported rectangular plate, which belongs to the technical field of clamping devices for mechanical testing of rectangular plates. Background technique [0002] The boundary of the four-sided simply supported rectangular plate is to constrain the out-of-plane degrees of freedom of each side and the in-plane rotational degrees of freedom around the vertical sides, that is, the deflection w=0 and the bending moment M=0 on the four sides of the rectangular plate, the expressions are as follows: [0003] (w) x＝0 =(M x ) x＝0 = 0, (w) x＝a =(M x ) x＝a =0 [0004] (w) y＝0 =(M y ) y＝0 = 0, (w) y＝b =(M y ) y＝b =0 (1) [0005] in, x and y are the coordinates of any point in the plane of the rectangular plate; x=0, x=a, y=0, y=b represent the four sides of the boundary of the rectangular plate. [0006] The clamping devices currently used for constrained bound...

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Problems solved by technology

[0006] The clamping devices currently used for constrained boundaries include four-sided fixed support, four-point simply supported, single-sided fixed support, or opposite-side fixed support, etc., but there are few clamping devices for four-sided simple boundary constraints, and the existing rectangular plate vibration test The clamping device also has the following problems: the fixture structure design of the four-point simply supported boundary is unstable, and the specimen is easily separated from the fixture during the vibration test; the constraint conditions are not enough, and the boundary requirements of formula (1) cannot be met; The rigidity of the fixed support structure is small, causing the fixture to resonate during the vibration test

In addition, the existing four-sided simply supported clamping device has a complex structure and is troublesome to assemble and disassemble. It can only clamp a sample of a single geometric size. For different sizes of samples, it is necessary to process a variety of clamping devices of corresponding sizes, which is time-consuming, laborious, and costly.

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