High-specific energy absorption lattice configuration under low-density condition

Abstract

The invention provides a high-specific energy absorption lattice configuration under a low-density condition. The lattice configuration comprises a support plate consisting of an upper panel and a lower panel, and a dot matrix core material installed between the upper panel and the lower panel and comprising two X-shaped rod pieces with a same structure; and each X-shaped rod piece comprises two orthogonally connected inclined rods and supporting rods located in the opening ends of the two sides of a connecting point respectively, two ends of each inclined rod form fixing ends making contact with the upper panel and the lower panel, and the two X-shaped rod pieces are orthogonally clamped through a connecting point of the two inclined rods. Under the action of an out-of-plane compression load, the lattice rod pieces keep an in-plane deformation mode, the density of the rod pieces at the center node is gradually increased, the bearing capacity of the lattice structure after peak is further improved through the friction and extrusion action between the rod pieces, rapid reduction of the bearing capacity caused by deformation of the rod pieces in the compression process is avoided, and kinetic energy caused by impact can be stably absorbed by a relatively high platform load.

Description

technical field

[0001] The invention relates to the field of lightweight energy-absorbing structures, in particular to a high-specificity energy-absorbing lattice structure that utilizes the interaction between lattice structure rods in the compression process to reduce the weakening phenomenon after the load peak under low-density conditions. Background technique

[0002] Lightweight energy-absorbing structures can be applied to various protective structures, such as automobiles, protective doors, etc. Realizing high specific energy absorption under low-density conditions has always been a goal pursued by lightweight energy-absorbing structures. For the current high-specific energy-absorbing lattice structure, for the tension-compression dominant lattice structure, the serious post-peak weakening phenomenon is the main reason that is not conducive to energy absorption. One of the main methods to improve energy absorption efficiency is to properly reduce the peak load. Signi...

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