Effect of Internal Structure in the Compression Behavior of Casted Al/LECA Composite Foams

Journal of Composites Science

H. Puga¹  Joaquim Barbosa¹  VitorH. Carneiro² 

[1] CMEMS-UMinho, University of Minho, Campus Azurem, 4800-058 Guimaraes, Portugal;MEtRiCS-UMinho, University of Minho, Campus Azurem, 4800-058 Guimaraes, Portugal;

关键词: syntactic foam;    aluminum alloy;    lightweight expanded clay (LECA) particles;    casting;   

DOI  :  10.3390/jcs2040064

来源: DOAJ

【 摘 要 】

In this paper, low-cost, aluminum-based composite metal foams are produced by the gravity die casting technique using lightweight expanded clay (LECA) as space holders. The influence of the voids generated by LECA particles on the syntactic composite samples density and mechanical behavior is characterized by quasi-static uniaxial compression. It is shown that smaller particles generate higher relative densities and a reduction in the value of densification strain. The use of larger particle diameter promotes an increase in yield strength and a more stable plateau region of the stress⁻strain curve, leading to higher values of crushing energy absorption. The influence of the internal structure on these experimental results is correlated with elasto-plastic numerical simulations, and it is suggested that a small mismatch in LECA particle diameter is advantageous for enhancing mechanical properties.

【 授权许可】

Unknown