層間配置對(duì)成層式鋁蜂窩吸能特性的影響
發(fā)布時(shí)間:2018-05-27 21:16
本文選題:層間配置 + 鋁蜂窩 ; 參考:《材料導(dǎo)報(bào)》2017年14期
【摘要】:為了考察層間配置對(duì)成層式鋁蜂窩吸能特性的影響,設(shè)計(jì)了由4種類型鋁蜂窩組成的多種成層式鋁蜂窩結(jié)構(gòu),主要包括單層、雙層、三層、四層的組合形式,分別對(duì)其進(jìn)行準(zhǔn)靜力單軸壓縮試驗(yàn)。結(jié)果表明:峰值力和平均平臺(tái)力與面密度成正比,但隨著蜂窩高度的增加,二者略微下降;等質(zhì)量等尺寸的條件下,成層式蜂窩優(yōu)于單層蜂窩;對(duì)比雙層鋁蜂窩結(jié)構(gòu)發(fā)現(xiàn),不等高成層結(jié)構(gòu)更具緩沖吸能優(yōu)勢(shì);對(duì)于同種蜂窩,隨著疊層數(shù)的增加,MP值逐漸下降;根據(jù)壓潰行為分析可知,當(dāng)成層式鋁蜂窩結(jié)構(gòu)的層數(shù)大于等于4時(shí),不能充分發(fā)揮其緩沖吸能作用?紤]到降低峰值力同時(shí)提高吸能水平,將上下層設(shè)置較硬型鋁蜂窩、中間層設(shè)置較軟型鋁蜂窩的成層式結(jié)構(gòu)可優(yōu)先選擇。
[Abstract]:In order to investigate the effect of interlayer configuration on the energy absorption characteristics of layered aluminum honeycomb, a variety of layered aluminum honeycomb structures consisting of four types of aluminum honeycomb were designed, including single layer, double layer, three layers and four layers. The quasi-static uniaxial compression tests were carried out respectively. The results show that the peak force and the average platform force are proportional to the surface density, but with the increase of the honeycomb height, they decrease slightly; the layered honeycomb is superior to the monolayer honeycomb under the condition of equal mass and equal size. For the same kind of honeycomb, the MP value decreases gradually with the increase of stack number. According to the analysis of collapsing behavior, the layer number of laminated aluminum honeycomb structure is greater than or equal to 4. Can not give full play to its buffer and energy absorption. Considering reducing the peak force and increasing the energy absorption level, the upper and lower layers of aluminum honeycomb are set as hard type, and the layered structure of soft aluminum honeycomb in the middle layer is preferred.
【作者單位】: 后勤工程學(xué)院軍事土木工程系;
【基金】:國(guó)家自然科學(xué)基金(51378495;51408602)
【分類號(hào)】:TB383.4
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