Numerical analysis of the effect of thickness of cell foil on the flexural behavior of honeycomb sandwich panels for use in PEM fuel cell end plates
محل انتشار: یازدهمین سمینار پیل سوختی ایران
سال انتشار: 1401
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 106
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شناسه ملی سند علمی:
PEEL11_031
تاریخ نمایه سازی: 18 تیر 1401
چکیده مقاله:
The fuel cell must be under the appropriate contact pressure, which is done by using two thick steel end plates that are very heavy. Therefore the use of a newly developed endplate with light weight is necessary. One suitable alternative is honeycomb sandwich structure. In this study, the honeycomb sandwich panel with aluminum honeycomb core and epoxy glass composite faces has been analyzed under three-point bending test with the aim of replacing it with fuel steel end plate. To analyze the flexural behavior, the finite element method is used by Abaqus software. The thickness of honeycomb cell foil is investigated as an effective parameter on flexural strength and the effect of this parameter on the flexural behavior of the sandwich panel is analyzed. Also, critical bending force, flexural strength,flexural modulus and force-displacement diagrams are obtained. In the end, the results of numerical analysis of sandwich panels are compared with each other.PEM fuel cells are one of the most important sources of clean energy in the future. End plates are one of the main components of PEMFC. Use of new end plates instead of steel end plates with lower weight is proposed. Much research has been done in this field. Habibnia designed and investigated honeycomb end plates for PEM fuel cells in two cases, with foam and no foam [۱]. Xiao Investigated the flexural behavior of a sandwich structure with an aluminum honeycomb core and a CFRP face under a TPB test [۲]. Wang Investigated the effect of core thickness and density on the properties of the sandwich structure with GFRP face and the aluminum honeycomb core [۳]. In this study, the end plate to be replaced has a sandwich structure with a honeycomb core. The effect of aluminum core foil thickness on the flexural behavior of the panels was investigated.The dimensions of the specimens according to ASTM C۳۹۳-۰۰ standard are determined in a rectangle with dimensions of ۴۰×۲۲۰ mm۲ .The core is made of aluminum and the faces are made of epoxy glass composite. Model under the TPB test and honeycomb core are shown in Fig. ۱.To investigate the effect of cell foil thickness on the flexural behavior of the panels, the results of the numerical analysis of the TPB test for three samples are compared. The test conditions are the same. The maximum bending force, strength, flexural modulus and force and modulus relative to weight are presented in Table ۲. Also, their force-displacement diagrams are shown in Figure ۲The maximum force increases steadily with increasing core cell foil thickness. The mechanical properties of the core are a function of its dimensions and geometry, and as the thickness of the aluminum core sheet increases, its strength increases. Therefore, it is predictable that with increasing thickness, the maximum bending load tolerable by the structure will increase. According to force and modulus relative to weight and considering the weight of the sample, it is observed that due to the increase in weight of the second sample compared to the third sample, the second sample has a favorable bending modulus and flexural load according to the load it bears.In this paper, the behavior of the honeycomb sandwich panels investigated and the effect of the cell foil thickness of the core investigated. After numerical analysis by Abaqus, Load-displacement curves are extracted. It is observed that the cell thickness has a positive effect on the maximum load that can be borne by the structure. However, it should be noted that the weight of the samples also increases with increasing thickness. As a result, it is important to achieve a sample with lower weight, flexural strength, and higher load bearing capacity
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نویسندگان
z Mollazadeh
Faculty of Mechanical Engineering and Manufacturing, Malek Ashtar University of technology, Tehran, Iran