Modeling of complex gray cast iron open-cell foams revealing insights on failure and deformation on different hierarchical length-scales
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Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley-VCH
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Open-cell gray cast iron foams are a class of porous materials of increasing interest, with great potential to be used in energy damping applications and for sound isolation. We created finite element (FE) models from 3D reconstructed data of foams and of isolated struts imaged with resolutions spanning from 0.65 to 10.5 mu m. Representative volume elements (RVE) are loaded in tension to simulate and analyze foam mechanical behavior. A ductile damage model is used for tensile testing of single struts and compression testing of foams. RVEs loaded along three axes demonstrate important effects of orientation of graphite particles in the microstructure. Only simulation results that take failure into consideration are consistent with experimental findings. Strut fracture initiation strongly depends on the cross-sectional area and its circularity and foam simulation results are heavily influenced by damage modeling. The complexity of the open-cell foam behavior is revealed at several hierarchical levels. Simulations in which material properties are assigned excluding damage overestimate the experimental results of the foam; conversely, a very good agreement is observed if damage is considered. The models exhibiting anisotropic mechanical properties fully reproducing large fluctuations in the mechanical properties of the struts are observed in in situ experiments.
Açıklama
Anahtar Kelimeler
Finite-Element Modeling, Gray Cast Iron, Metal Foams, Microstructures, Struts, Synchrotron Microtomography, Sonlu Eleman Modelleme, Metal Köpükler, Mikro Yapılar, Dikmeler, Senkrotron Mikrotomografisi
Kaynak
Advanced Engineering Materials
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
Sayı
Künye
Kaya, A. C., Zaslansky, P., & Fleck, C. (2021). Modeling of Complex Gray Cast Iron Open?Cell Foams Revealing Insights on Failure and Deformation on Different Hierarchical Length?Scales. Advanced Engineering Materials, 2100677.
