The Moisture Diffusion Equation for Moisture Absorption of Multiphase Symmetrical Sandwich Structures

Hang Yu, Lu Yao, Yan Ma, Zhaoyuan Hou, Jiahui Tang, Yuming Wang and Yang Ni
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Hang Yu: School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China
Lu Yao: School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China
Yan Ma: School of Textile and Clothing, Nantong University, Nantong 226019, China
Zhaoyuan Hou: School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China
Jiahui Tang: School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China
Yuming Wang: School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China
Yang Ni: Shanghai Electro-Mechanical Engineering Institute, Shanghai 201109, China

Mathematics, 2022, vol. 10, issue 15, 1-15

Abstract: When hydrophilic materials (such as natural fiber, epoxy resin or concrete) compose sandwich structures, the moisture absorption from hydrothermal environments may significantly affect their mechanical properties. Although some experimental works were carried out, few mathematical efforts have been made to describe the moisture diffusion of multiphase symmetrical sandwich structures thus far. In this paper, the moisture diffusion equation was developed to effectively predict the moisture diffusion behavior of multiphase symmetrical sandwich structures as the function of aging time. Both finite element analysis (FEA) and experimental works were carried out to validate the accuracy of the analytical method, and the analytical results show a good agreement with FEA and experimental data. The effect of the interface condition on the concentration at the interfaces was discussed; the difference between concentration and normalized concentration was illustrated; the correct interface condition, which is a continuous normalized concentration condition, was explained for the moisture diffusion behavior of sandwich structures.

Keywords: sandwich structures; moisture diffusion equation; normalized concentration; multiphase (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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