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泡沫鋁填充金屬波紋夾芯梁彎曲破壞模式研究
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西北工業(yè)大學(xué),西安交通大學(xué)

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基金項(xiàng)目:

國家自然科學(xué)基金 (11702326),陜西省自然科學(xué)基金 (2020JQ-113),中央高校基本科研業(yè)務(wù)費(fèi) (G2019KY05106)項(xiàng)目資助。


Failure mode of aluminum foam-filled corrugated sandwich beam under three-point bending load
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1.Northwestern Polytechnical University;2.Xi''an Jiaotong University

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    摘要:

    為了提高金屬波紋結(jié)構(gòu)的承載效率，充分發(fā)揮泡沫鋁在能量吸收方面的優(yōu)勢，本文設(shè)計(jì)了泡沫鋁填充金屬波紋三明治夾芯梁。針對波紋結(jié)構(gòu)各向異性的特點(diǎn)，本文對其橫向和縱向兩個(gè)方向在三點(diǎn)彎曲載荷作用下的力學(xué)響應(yīng)及破壞模式進(jìn)行了試驗(yàn)研究。研究表明，泡沫鋁的填充可以有效改變金屬波紋夾芯梁的彎曲破壞模式，其彎曲剛度和峰值載荷均得到了大幅提升。和橫向彎曲相比，金屬波紋夾芯梁在縱向彎曲時(shí)具有更強(qiáng)的承載能力，且泡沫鋁填充的增強(qiáng)效果更加顯著?？v向彎曲時(shí)載荷在達(dá)到峰值后并不會(huì)突然下降而是呈現(xiàn)出很長的平臺區(qū)，表現(xiàn)出更強(qiáng)的后屈曲承載能力。

    Abstract:

    Aluminum foam is used as filling material to improve the load bearing efficiency of metallic sandwich beam with corrugated cores. After filling of aluminum foam prims into the space of corrugated cores which were cut firstly and gluing process, aluminum foam-filled corrugated sandwich beam is formed. Considering the anisotropy of the corrugated structure, both transverse and longitudinal bending response and failure modes are studied by three-point bending loads experimentally. The result shows that aluminum foam filling can effectively change the bending failure mode of corrugated sandwich beam, and lead to a significant increase of bending stiffness and peak bending load. Compared with transverse bending, the enhancement effect of aluminum foam filling on longitudinal bending is more significant. The bending loads presents a long plateau region and with no notable decline after its peak, showing a stronger post-buckling bearing capacity.

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閆雷雷.泡沫鋁填充金屬波紋夾芯梁彎曲破壞模式研究[J].稀有金屬材料與工程,2021,50(12):4365~4371.[Yan Leilei. Failure mode of aluminum foam-filled corrugated sandwich beam under three-point bending load[J]. Rare Metal Materials and Engineering,2021,50(12):4365~4371.]
DOI：10.12442/j. issn.1002-185X.20200991

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  • 收稿日期:2020-12-23
  • 最后修改日期:2021-02-22
  • 錄用日期:2021-03-08
  • 在線發(fā)布日期: 2022-01-09
  • 出版日期: 2021-12-24