Abstract
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.
Published Version
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