A multi -steady -state twist composite energy absorption structure
An energy-absorbing structure, multi-stable technology, applied in the direction of shock absorbers, shock absorbers, mechanical equipment, etc., to achieve the effect of being conducive to design, improving torsional deformation, and improving energy absorption effect
Active Publication Date: 2022-06-07
XI AN JIAOTONG UNIV
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a multi-stable compression-torsion composite energy-absorbing structure for the above-mentioned deficiencies in the prior art, which integrates the compression-torsion structure and the bistable structure, and solves the problem of compaction of the bistable structure. The plastic deformation problem of the structure is improved, the service life of the structure is improved, the large deformation of the elastic stage of the multi-stable compression-torsion structure is realized, the torsion angle under the compression deformation of the structural unit is greatly improved, and excellent vibration damping ability and energy absorption efficiency are obtained.
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Embodiment 1
[0058] (1) Using the commercial three-dimensional modeling software SolidWorks to draw the three-dimensional data model of the cover plate, the splint and the bistable unit cell in the multi-stable compression-torsion composite structure. Among them, adjust the angle between the left and right first rods 6, 150°~170°, the middle interval is 5°, and set up bistable unit cells with 5 different angles. The thickness of the upper part of the first rod 6 is 4mm, and the lower part of the first rod 6 The thickness is 4mm, the angle of the connection between the first rod 6 and the second rod 7 is 45°, the first rod 6 on the left has a corner of 120°, the second rod 7 is 1mm long, and the overall bistable unit cell height is 30mm and width 50mm. Convert the obtained 3D data model into STL format data and export.
[0059] (2) Thicken the cover plate data obtained in the previous step by 0.1 mm to make the fitting process an interference fit, and then slice the data of the three-dimens...
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The invention discloses a multi-stable compression-torsion composite energy-absorbing structure, which includes a plurality of bistable compression-torsion composite unit cells, which are processed by an additive manufacturing process and then assembled using a composite manufacturing process of lap-interference fit. A multistable compression-torsion composite structure is obtained. The present invention realizes the hybrid composite structure design with multi-stable effect and compression-torsion effect at the same time, and the obtained multi-stable compression-torsion composite energy-absorbing structure has the characteristics of strong buffer capacity, high energy absorption efficiency and reusability, and The mechanical performance can be customized and mechanically coded by modifying the structural parameters. Combined with the gradient design, the combination of different peaks can be coded. It has very good application prospects in the fields of aerospace, transportation, high-end equipment, and national defense and military.
Description
technical field [0001] The invention belongs to the technical field of mechanical metamaterials, and in particular relates to a multi-stable pressure-torsion composite energy-absorbing structure. Background technique [0002] In the fields of aerospace and transportation, vibration-absorbing and energy-absorbing structures are widely used to reduce structural vibration, buffer energy absorption, protect precision sensors, and extend the service life of equipment. However, traditional vibration-damping structures, such as metal rubber, often have errors in design and manufacture, which need to be corrected by experience. [0003] Bistable structure means that the structure itself has two stable states, and in the process of transitioning from one stable state to another stable state, the structure will experience sudden instability, accompanied by obvious vibration, thereby absorbing certain energy. After transferring to another stable state, the structure will also store a...
Claims
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IPC IPC(8): F16F7/00
CPCF16F7/00Y02T50/40
Inventor 韩宾王泽雨李芸瑜张琦
Owner XI AN JIAOTONG UNIV