本文選題：蜂窩 + 彈性支撐　； 參考：《復(fù)合材料學(xué)報(bào)》2017年06期

【摘要】：結(jié)合最小余能原理和薄板剪切屈曲失穩(wěn)理論,給出了蜂窩芯等效剪切屈曲強(qiáng)度的理論表達(dá)式。將胞壁等效為受彈性支撐的梁,通過(guò)對(duì)固支和簡(jiǎn)支條件下的屈曲強(qiáng)度進(jìn)行插值求解實(shí)際胞壁間為彈性支撐時(shí)的剪切屈曲強(qiáng)度。然后,利用三點(diǎn)短梁彎曲試驗(yàn)測(cè)量常用Nomex蜂窩芯的剪切屈曲強(qiáng)度,并與彈性支撐下的理論解進(jìn)行對(duì)比,試驗(yàn)結(jié)果與理論解吻合較好,驗(yàn)證了理論方法的有效性。最后,討論了剪切屈曲強(qiáng)度的各向異性及蜂窩高度對(duì)剪切屈曲強(qiáng)度的影響。結(jié)果表明,剪切屈曲強(qiáng)度的各向異性程度與蜂窩高度無(wú)關(guān),但隨著蜂窩高度的增加,蜂窩芯的縱向和橫向剪切屈曲強(qiáng)度均逐漸減少,減小幅度逐漸減緩。
[Abstract]:Based on the principle of minimum complementary energy and the theory of shear buckling instability of thin plates, the theoretical expression of equivalent shear buckling strength of honeycomb cores is given. The cell wall is equivalent to the elastic braced beam, and the shear buckling strength is calculated by interpolating the buckling strength under the condition of clamping and simply supporting. Then the shear buckling strength of commonly used Nomex honeycomb cores is measured by three point short beam bending test and compared with the theoretical solution under elastic support. The experimental results are in good agreement with the theoretical solution and the validity of the theoretical method is verified. Finally, the anisotropy of shear buckling strength and the effect of honeycomb height on shear buckling strength are discussed. The results show that the anisotropy of shear buckling strength is independent of honeycomb height, but with the increase of honeycomb height, the longitudinal and transverse shear buckling strength of honeycomb core decreases gradually, and the decreasing amplitude gradually decreases.
【作者單位】： 西北工業(yè)大學(xué)航空學(xué)院;
【基金】：西北工業(yè)大學(xué)研究生創(chuàng)意創(chuàng)新種子基金(Z2015046)
【分類號(hào)】：TB383.4
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本文編號(hào)：1825167