Guiding expanded tube type honeycomb and manufacturing method thereof

Abstract

The invention belongs to the technical field of honeycomb structures, and relates to a guide expanded tube type honeycomb and a manufacturing method thereof. The guiding expanded tube type honeycomb is characterized in that honeycomb tube parts are partially arranged into expanded tubes to form energy absorbing units in an interference fitting manner, wherein a plurality of energy absorbing unitsare arranged around a guiding tube; in case of impacting force, the guiding expanded tube type honeycomb is axially guided through the guiding tube, and the expanded tubes are uniformly crushed through the honeycomb tubes, thus the inside diameter of the expanded tubes increases due to expansion, and the impacting kinetic energy can be converted into expanded tube deformation and frictional heat energy, and as a result, the first-order energy absorbing is realized; when the honeycomb tubes are completely crushed and positioned into the expanded tubes, the honeycomb tubes and the expanded tubesare uniformly wrinkled and crumpled under the guiding of the guiding tube, and the impacting kinetic energy is converted into plastic deformation of the honeycomb, thus realizing the second-order energy absorbing. Therefore, energy absorbing elements of the guide expanded tube type honeycomb have the second-order energy absorbing capacity; the guiding tubes for guiding are capable of guiding thehoneycomb tubes to axially compress toward the expanded tubes in the whole honeycomb impacting and energy absorbing process, and moreover, instability is hardly caused; and meanwhile, the lateral stressing intensity of the honeycomb is improved through the guiding tube, so that the axial compressing can be uniformly and stably performed.

Description

technical field [0001] The invention belongs to the technical field of honeycomb structure, and more specifically relates to a guide-expandable honeycomb and a manufacturing method thereof. Background technique [0002] The honeycomb structure is not only a lightweight material, but also an energy-absorbing material. The traditional honeycomb structure is formed by stacking foils with glue, hot pressing, stretching (stretching method) or roll forming and then stacking (forming method). Generally, it is a lattice structure with hexagonal cells. The axial static pressure energy absorption is uniform, the lateral strength is weak, and there is no energy absorption effect. For some requirements for energy absorption twice in a row, one honeycomb structure cannot meet the requirements, and it may be necessary to glue two honeycomb structures with different pore sizes. Even so, the axial large-stroke compression is prone to instability. The traditional honeycomb structure is d...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a guide-expandable honeycomb and its manufacturing method to solve the technical problems that the existing honeycomb structure has weak lateral strength, no secondary energy-absorbing function in the axial direction, and is easy to lose stability under large-stroke compression in the axial direction.

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