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具有薄外壁的閉孔泡沫鋁棒的彎曲行為
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作者單位:

1.河北工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，天津 300401;2.邢臺學(xué)院 物理與電子工程學(xué)院，河北 邢臺 054001;3.天津大學(xué) 材料科學(xué)與工程學(xué)院，天津 300350;4.陸軍裝甲兵學(xué)院 裝備再制造技術(shù)國防科技重點實驗室，北京 100072

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基金項目:

Special Fund For Military-civilian Integration Development of Hebei Province and Key R&D Program of Hebei Province (22351003D).


Bending Behavior of Closed-Cell Aluminum Foam Bar with Thin Outer Wall
Author:
Affiliation:

1.School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China;2.College of Physics and Electronic Engineering, Xingtai University, Xingtai 054001, China;3.School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China;4.National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China

Fund Project:

Military-Civilian Integration Development of Hebei Province; Key R&D Program of Hebei Province (22351003D)

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    摘要:

    通過熔融發(fā)泡法制備了具有薄外壁的鋁泡沫棒（aluminum foam bar，AFB）。通過懸臂梁彎曲實驗和有限元模擬研究了跨度、直徑和孔隙率對其彎曲變形行為的影響。采用高速攝像機記錄了AFB的彎曲變形行為，并得到了載荷和位移之間的關(guān)系。基于三維有限元的X射線微斷層掃描技術(shù)（Micro-CT）重建AFB，并進(jìn)行了數(shù)值模擬。結(jié)果表明，跨度對破壞行為有重要影響，跨度的增加導(dǎo)致了能量吸收能力下降。此外，直徑和相對密度的增加也使得峰值載荷提高。有限元模擬結(jié)果與實驗結(jié)果相吻合，這說明孔壁在彎曲過程中由于不同類型的應(yīng)力而失效。在失效過程中，裂紋遵循孔壁最薄弱的路徑傳播。

    Abstract:

    Aluminum foam bar (AFB) with thin outer wall was prepared by melt foaming method. The effect of span, diameter and porosity on its bending deformation behavior was investigated by cantilever beam bending experiment and finite element simulation. Bending deformation behavior was recorded by high-speed camera and the relationship between load and displacement was obtained. X-ray micro-computer tomography (Micro-CT) technique based on 3D finite elements was selected to scan and to reconstruct AFB, by which numerical simulation was carried out. The results show that span has important effect on the failure behavior and the increased span leads to decreased energy absorption capacity. In addition, increased diameter and relative density contribute to peak load improvement. Finite element simulation results match well with the experimental results, which clarifies that cell walls fail due to different types of stress during the bending process. Crack propagation follows the weakest cell walls path link during the failure process.

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引用本文

王增,張贊,劉楠楠,夏興川,張子晨,丁儉,王佳成,崔李鵬,邱子軒,王玉江,劉永長.具有薄外壁的閉孔泡沫鋁棒的彎曲行為[J].稀有金屬材料與工程,2024,53(3):667~675.[Wang Zeng, Zhang Zan, Liu Nannan, Xia Xingchuan, Zhang Zichen, Ding Jian, Wang Jiacheng, Cui Lipeng, Qiu Zixuan, Wang Yujiang, Liu Yongchang. Bending Behavior of Closed-Cell Aluminum Foam Bar with Thin Outer Wall[J]. Rare Metal Materials and Engineering,2024,53(3):667~675.]
DOI：10.12442/j. issn.1002-185X.20230141

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  • 收稿日期:2023-03-19
  • 最后修改日期:2023-05-19
  • 錄用日期:2023-06-01
  • 在線發(fā)布日期: 2024-03-22
  • 出版日期: 2024-03-20