The invention relates to a pre-folded thin-walled tube structure filled with density gradient honeycombs. Comprising a pre-folded thin-wall square tube and a density gradient honeycomb filling structure filled in the pre-folded thin-wall square tube, the inner diameter and the outer diameter of the pre-folded thin-wall square pipe in the axial direction are not changed, the side wall face of the pre-folded thin-wall square pipe is a corrugated plate, the thickness of the corrugated plate is gradually increased from the near-impact side to the far-impact side in the axial direction of the pipe, the corrugated shape of the corrugated plate is a triangle, and the span of the triangle is gradually increased from the near-impact side to the far-impact side in the axial direction of the pipe. The density gradient honeycomb filling structure is formed by a plurality of thin-wall cell elements through a coincident boundary array, the cross section of each cell element is in a regular polygon shape, arc-shaped reinforced cell walls are arranged in all vertexes of the regular polygons, and the arc-shaped reinforced cell walls are gradually increased from the near-impact side to the far-impact side in the axial direction of the cell elements. The collision load transfer characteristic is remarkably improved, local damage and overall instability of the thin-wall structure are avoided, and the energy absorption efficiency of the thin-wall structure is improved.
本发明为一种密度梯度蜂窝填充的预折叠薄壁管结构。包括预折叠薄壁方管和填充在预折叠薄壁方管内的密度梯度蜂窝填充结构;预折叠薄壁方管沿轴向的内径和外径均不变,预折叠薄壁方管的侧壁面为波纹板,波纹板沿管轴向从近冲击侧到远离冲击侧厚度逐渐增加、波纹板的波纹形状为三角形,且三角形的跨度沿管轴向从近冲击侧到远离冲击侧逐渐增加;密度梯度蜂窝填充结构由多个薄壁胞元通过重合边界阵列形成,胞元截面形状为正多边形,且正多边形的各个顶点内设有弧形强化胞壁,弧形强化胞壁沿胞元轴向从近冲击侧到远离冲击侧逐渐增加。本发明显著改善碰撞载荷传递特性,避免薄壁结构局部损伤与整体失稳,提高薄壁结构能量吸收效率。
Pre-folded thin-walled tube structure filled with density gradient honeycombs
一种密度梯度蜂窝填充的预折叠薄壁管结构
2025-04-04
Patent
Electronic Resource
Chinese
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