Experimental and FEM analysis of the compressive behavior of 3D random fibrous materials with bonded networks

Three-dimensional (3D) random fibrous (RF) materials with bonded networks exhibit unique mechanical properties. In this paper, an inorganic RF material is fabricated and its compressive behavior is studied by experiment. Based on the experimental characterization, a 3D numerical model is constructed...

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Bibliographic Details
Published in:Journal of materials science 2014-02, Vol.49 (3), p.1386-1398
Main Authors: Liu, Qiang, Lu, Zixing, Zhu, Man, Yang, Zhenyu, Hu, Zijun, Li, Junning
Format: Article
Language:English
Subjects:
Algorithms
Aspect ratio
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Compressive properties
Compressive strength
Computer simulation
Contact springs
Crystallography and Scattering Methods
Failure mechanisms
Finite element method
Materials Science
Mathematical models
Mechanical properties
Modulus of elasticity
Polymer Sciences
Porosity
Solid Mechanics
Three dimensional models
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Summary:Three-dimensional (3D) random fibrous (RF) materials with bonded networks exhibit unique mechanical properties. In this paper, an inorganic RF material is fabricated and its compressive behavior is studied by experiment. Based on the experimental characterization, a 3D numerical model is constructed using a series of geometrical algorithms. Afterward, the statistical distribution of fiber segment aspect ratio is calculated using the numerical model, which is consistent with that measured from SEM photos. The compressive behavior of this RF material is simulated using finite element method (FEM). In the FEM model, the effect of fiber–fiber contact is realized by contact spring. The calculated results agree well with experimental data. Moreover, the predicted failure mechanism is verified by SEM observation. Finally, the FEM model is employed to investigate the influences of porosity on the elastic modulus and compressive strength of the RF material.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-013-7823-6