Acta Mechanica Solida Sinica

, Volume 25, Issue 2, pp 111–116 | Cite as

Experimental and simulated Compressive Properties of Work-Hardened X-Type Lattice Truss Structures

Article

Abstract

The expanded metal sheets were folded with 11% work-hardening. These were subsequently used with resistance welding to construct X-type lattice truss sandwich panels having a core relative density of 0.17. The sandwich panels were tested in uniaxial compression and, for comparison, the method of finite elements was employed to simulate the measured compressive stress-strain curves. The peak compressive strength was 32% higher than that of pyramidal core sandwiches. The enhanced mechanical properties of the work-hardened X-Type lattice structures mainly originate from the contribution of straight struts with low degree of curvature and work hardening, rather than the two-dimensional staggered nodes.

Key words

sandwichs work hardening resistance welding X-type core 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    Lu, T.J., Valdevit, L. and Evans, A.G., Active cooling by metallic sandwich structures with periodic cores. Progress in Materials Science, 2005, 50(7): 789–815.CrossRefGoogle Scholar
  2. [2]
    Wadley, H.N.G., Multifunctional periodic cellular metals. Philosophical Transactions of the Royal Society a-Mathematical Physical and Engineering Sciences, 2006, 364(1838): 31–68.CrossRefGoogle Scholar
  3. [3]
    Biagi, R. and Bart-Smith, H., Imperfection sensitivity of pyramidal truss sandwich panels. International Journal of Solids and Structures, 2007, 44(14–15): 4690–4706.CrossRefGoogle Scholar
  4. [4]
    Wang, B., Wu, L.Z., Jin, X., Du, S.Y., Sun, Y.G. and Ma, L., Experimental investigation of 3D sandwich structure with core reinforced by composite columns. Materials & Design, 2010, 31(1): 158–165.CrossRefGoogle Scholar
  5. [5]
    Tang, Y., Zhou, W., Xiang, J.H., Liu, W.Y. and Pan, M.Q., An innovative fabrication process of porous metal fiber sintered felts with three-dimensional reticulated structure. Materials and Manufacturing Processes, 2010, 25(7): 565–571.CrossRefGoogle Scholar
  6. [6]
    Kooistra, G.W. and Wadley, H.N.G., Lattice truss structures from expanded metal sheet. Materials & Design, 2007, 28(1): 507–514.CrossRefGoogle Scholar
  7. [7]
    Zhang, Q.C. and Lu, T.J., Work-hardened pyramidal lattice truss structures made from slit/expanded metal sheets, 2011, submited for publication.Google Scholar
  8. [8]
    Zhang, Q.C., Han, Y.J., Chen, C. and Lu, T.J., Ultralight X-type lattice sandwich structure: 1. Concept, fabrication and experimental characterization. Science in China Series E: Technological Sciences, 2009, 52(8): 2147–2154.CrossRefGoogle Scholar
  9. [9]
    Zhang, Q.C., Chen, A.P., Chen, C. and Lu, T.J., Ultralight X-type lattice sandwich structure: 2. Micromechanics modeling and finite element analysis. Science in China Series E: Technological Sciences, 2009, 52(9): 2670–2680.CrossRefGoogle Scholar

Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2012

Authors and Affiliations

  1. 1.MOE Key Laboratory of Strength & Vibration, School of AerospaceXi’an Jiaotong UniversityXi’anChina

Personalised recommendations