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Microstructural characterization and constitutive modeling of deformation of closed-cell foams based on in situ x-ray tomography
Chai, HW; Xie, ZL; Xiao, XH; Xie, HL; Huang, JY; Luo, SN
2020
Source PublicationINTERNATIONAL JOURNAL OF PLASTICITY
ISSN0749-6419
Volume131Pages:-
Subtype期刊论文
AbstractPolymethacrylimide (PMI) foams own the highest specific stiffness and strength of all foams. In situ x-ray micro computed tomography (CT) is used to map three-dimensional (3D) microstructures of this representative closed-cell foam under quasi-static compression. The strain fields obtained via digital volume correlation reveal divergent types (discrete or spreading) of deformation banding for the PMI foam with different densities (52 or 75 kg m(-3)). Significant cell collapse occurs in the deformation bands, leading to similar to 40% reduction of the mean cell size, and alignment of cell orientations. Microstructure-based finite element analysis confirms that elastic buckling of cell walls dominates cell collapse, and the buckling strength of walls depends highly on their thicknesses and inclination angles. An edge segmentation technique is then used to quantify the morphology and buckling strength index of cell walls. The spatial distribution of the weakest 3% cell walls correlates well with the modes of deformation banding. Based on elastic buckling of cell walls, new analytical models are developed to predict the strength-density scaling law and stress-strain curves of the PMI foam, which agree well with the experimental results.
KeywordCOMPRESSIVE BEHAVIOR ALUMINUM FOAM STRAIN-RATE LOCALIZATION DAMAGE SHEAR MECHANISMS COMPOSITE POROSITY SOLIDS
DOI10.1016/j.ijplas.2020.102730
Indexed BySCI ; EI
Language英语
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/33006
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Peac Inst Multiscale Sci, Chengdu 610031, Sichuan, Peoples R China
2.Southwest Jiaotong Univ, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Sichuan, Peoples R China
3.Southwest Jiaotong Univ, Inst Mat Dynam, Chengdu 610031, Sichuan, Peoples R China
4.Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
5.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China
Recommended Citation
GB/T 7714
Chai, HW,Xie, ZL,Xiao, XH,et al. Microstructural characterization and constitutive modeling of deformation of closed-cell foams based on in situ x-ray tomography[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2020,131:-.
APA Chai, HW,Xie, ZL,Xiao, XH,Xie, HL,Huang, JY,&Luo, SN.(2020).Microstructural characterization and constitutive modeling of deformation of closed-cell foams based on in situ x-ray tomography.INTERNATIONAL JOURNAL OF PLASTICITY,131,-.
MLA Chai, HW,et al."Microstructural characterization and constitutive modeling of deformation of closed-cell foams based on in situ x-ray tomography".INTERNATIONAL JOURNAL OF PLASTICITY 131(2020):-.
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