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Lattice sandwiching structure edgewise compressive testing device

A test device, sandwich structure technology, applied in the testing of machine/structural components, measuring device, using stable tension/pressure to test the strength of materials, etc., can solve the problems of poor operability and low measurement accuracy, and achieve high The effect of precision measurement, improving measurement accuracy and reducing measurement cost

Inactive Publication Date: 2019-07-19
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] In order to improve the current situation of low measurement accuracy and poor operability in the existing standards for measuring the lateral compressive strength of laminated panels with lattice sandwich structures, the present invention provides a lateral pressure test device for lattice sandwich structures
The device solves the centering problem during the installation and loading of the test piece, greatly reduces the influence of installation error and loading error on the test results, and improves the calculation accuracy of the lateral compressive strength of the laminate

Method used

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  • Lattice sandwiching structure edgewise compressive testing device
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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] a) Measure the test specimen. Measure the width and thickness of any three places within the span of the test specimen, and take the arithmetic mean value. The thickness of the panel shall be the nominal thickness or the average thickness of the same batch of samples. Record the number of unit cells in the cross section.

[0017] b) Install the clamping part of the test specimen. Due to the plate-like structure of the specimen, the asymmetrical installation during the lateral pressure test will easily lead to the failure of the test. When installing, put one side of the test piece (8) close to the inner wall of the upper groove (2) and the lower groove (6), clamp the test piece (8) through the gasket (7) and tighten the bolt (3), and install the left and right stoppers. Plate (9,4), because upper groove (2) can slide up and down duri...

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Abstract

The invention discloses a lattice sandwiching structure edgewise compressive testing device. The testing device mainly comprises a clamping part, a centering loading part and a measuring part, the measuring accuracy can be effectively increased, the measuring cost is lowered, and high-accuracy measuring of lattice sandwiching structure edgewise compressive testing deforming is realized. To improvethe current situation of the low accuracy and poor operability in a measurement standard of edgewise compressive strength of an existing lattice sandwiching structure laminate, the lattice sandwiching structure edgewise compressive testing device solves the problem of centering during mounting and loading of test specimens, the effect of the mounting error and loading error on a testing result isgreatly reduced, and thus the calculation accuracy of the edgewise compressive strength of the laminate is improved. In addition, the device designs an extensometer mounting structure, the problem ofeasily toppling of the testing specimen is improved through a supporting structure, and operability of testing is effectively improved.

Description

technical field [0001] The invention is a new type of test device for testing the lateral pressure properties of a lattice sandwich structure, which can effectively improve the measurement accuracy, reduce the measurement cost, and realize high-precision measurement of the deformation of the lattice sandwich structure in a lateral pressure test. Background technique [0002] Since the lattice sandwich structure was proposed, its light weight, high specific stiffness and high specific strength have attracted great attention. In addition, it also has special properties such as shock absorption, heat dissipation, sound absorption, and electromagnetic shielding. It is a new type of structural functional material that comprehensively considers factors such as material design, structural design, and functional design. The study found that the equivalent stiffness and equivalent strength of the lattice sandwich structure have an approximately linear relationship with the equivalent...

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Application Information

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IPC IPC(8): G01N3/08G01N3/04G01M5/00
CPCG01M5/005G01N3/04G01N3/08G01N2203/0019G01N2203/0075G01N2203/0282G01N2203/0423
Inventor 龙连春王林刚张嘉吴奇
Owner BEIJING UNIV OF TECH
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