TY - JOUR
T1 - Multiple-inclusion model for the transport properties of porous composites considering coupled effects of pores and interphase around spheroidal particles
AU - Xu, Wenxiang
AU - Zhang, Dongyang
AU - Lan, Peng
AU - Jiao, Yang
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China [grant numbers 11772120 , 11402076 ]; the Natural Science Foundation of Jiangsu Province [grant number BK20170096 ]; and the Fundamental Research Funds for the Central Universities [grant number 2016B06314 ]. The State Scholarship Fund from China scholarship council is greatly acknowledged.
Funding Information:
This work was supported by the National Natural Science Foundation of China [grant numbers 11772120, 11402076]; the Natural Science Foundation of Jiangsu Province [grant number BK20170096]; and the Fundamental Research Funds for the Central Universities [grant number 2016B06314]. The State Scholarship Fund from China scholarship council is greatly acknowledged.
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/1
Y1 - 2019/1
N2 - Understanding of the effects of particle geometries, pores and interphase characteristics on transport properties of porous composites is very crucial to the smart design of porous composites and the improvement of their durability. In this work, the authors devise a multiple-inclusion micromechanical model to predict the effective transport properties of multiphase porous composites, where spheroidal inclusions of diverse types are randomly dispersed in a homogeneous matrix. The multiple-inclusion model is then applied to estimate the effective diffusivity of four-phase porous composites containing impermeable particles, pores, highly permeable interphase and matrix. Specifically, the microstructural characteristics of pores, interphase and particles, and their physical properties are incorporated into the evaluation of the effective diffusivity of porous composites. It is shown that the present model leads the prediction of diffusivity of porous composites to reasonable accuracy by comparing with extensive experimental data. Moreover, utilizing the proposed model, we investigate the dependence of effective diffusivity of porous composites on the shape, volume fraction and size distribution of impermeable particles, the interphase thickness and volume fraction, and the porosity characterized by the hydration degree of cement and the water-cement ratio. The results reveal that the geometrical and physical properties of these components play a significant role in determining the diffusivity of porous composites. The multiple-inclusion model provides a powerful and convenient predictive toolkit for multiphase composite design and evaluation.
AB - Understanding of the effects of particle geometries, pores and interphase characteristics on transport properties of porous composites is very crucial to the smart design of porous composites and the improvement of their durability. In this work, the authors devise a multiple-inclusion micromechanical model to predict the effective transport properties of multiphase porous composites, where spheroidal inclusions of diverse types are randomly dispersed in a homogeneous matrix. The multiple-inclusion model is then applied to estimate the effective diffusivity of four-phase porous composites containing impermeable particles, pores, highly permeable interphase and matrix. Specifically, the microstructural characteristics of pores, interphase and particles, and their physical properties are incorporated into the evaluation of the effective diffusivity of porous composites. It is shown that the present model leads the prediction of diffusivity of porous composites to reasonable accuracy by comparing with extensive experimental data. Moreover, utilizing the proposed model, we investigate the dependence of effective diffusivity of porous composites on the shape, volume fraction and size distribution of impermeable particles, the interphase thickness and volume fraction, and the porosity characterized by the hydration degree of cement and the water-cement ratio. The results reveal that the geometrical and physical properties of these components play a significant role in determining the diffusivity of porous composites. The multiple-inclusion model provides a powerful and convenient predictive toolkit for multiphase composite design and evaluation.
KW - Diffusivity
KW - Interphase
KW - Multiple inclusions
KW - Pore
KW - Porous composites
KW - Spheroidal particle
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U2 - 10.1016/j.ijmecsci.2018.10.063
DO - 10.1016/j.ijmecsci.2018.10.063
M3 - Article
AN - SCOPUS:85055983541
SN - 0020-7403
VL - 150
SP - 610
EP - 616
JO - International Journal of Mechanical Sciences
JF - International Journal of Mechanical Sciences
ER -