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Ultralight X-type lattice sandwich structure (I): Concept, fabrication and experimental characterization

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Abstract

A new type of ultra-lightweight metallic lattice structure (named as the X-type structure) is reported. This periodic structure was formed by two groups of staggered struts in the traditional pyramid structure, and fabricated by folding expanded metal sheet along rows of offset nodes and then brazing the folded structure (as the core) with top and bottom facesheets to form sandwich panels. The out-of-plane compressive and shear properties of the X-type lattice sandwich structure were investigated experimentally and compared to those of the sandwich having a pyramidal truss core. It is found that the formation of the 2-dimensional staggered nodes can effectively make the X-type structure more resistant to inelastic and plastic buckling under both compression and shear loading than the pyramidal lattice truss. Obtained results show that the compressive and shear peak strengths of the X-type lattice structure are about 30% higher than those of the pyramidal lattice truss having the same relative density.

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Authors and Affiliations

  1. State Key Laboratory for Mechanical Behavior of Materials, School of Material Science and Engineering, Xi’an Jiaotong University, Xi’an, 710049, China

    QianCheng Zhang & YunJie Han

  2. MOE Key Laboratory for Strength and Vibration, School of Aerospace, Xi’an Jiaotong University, Xi’an, 710049, China

    ChangQing Chen & TianJian Lu

  3. Department of Engineering Mechanics, AML, Tsinghua University, Beijing, 100084, China

    ChangQing Chen

Authors
  1. QianCheng Zhang
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  2. YunJie Han
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  3. ChangQing Chen
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  4. TianJian Lu
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Corresponding author

Correspondence to TianJian Lu.

Additional information

Supported by the National Basic Research Program of China (“973” Project) (Grant No. 2006CB601202), the National Natural Science Foundation of China (Grant Nos. 10632060,10825210), the National “111” Project of China (Grant No. B06024) and the National High-Tech Research and Development Program of China (“863” Project) (Grant No. 2006AA03Z519)

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Zhang, Q., Han, Y., Chen, C. et al. Ultralight X-type lattice sandwich structure (I): Concept, fabrication and experimental characterization. Sci. China Ser. E-Technol. Sci. 52, 2147–2154 (2009). https://doi.org/10.1007/s11431-009-0219-9

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  • DOI: https://doi.org/10.1007/s11431-009-0219-9

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