Investigation of the Constitutive Model of W/PMMA Composite Microcellular Foams
AbstractInvestigating the constitutive relationship of a material can provide better understanding of the mechanical properties of a material and has an irreplaceable effect on optimizing the performance of a material. This paper investigated a constitutive model for tungsten/polymethyl-methacrylate (W/PMMA) composite microcellular foams prepared by using melt mixing and supercritical carbon dioxide foaming. The stress-strain relationships of these foams with different W contents were measured under static compression. The elastic modulus and compressive strength values of the foams were remarkably greater than those of the pure PMMA foams: at a W content of 20 wt %, these values were increased by 269.1% and 123.9%, respectively. Based on the Maxwell constitutive model, the relevant coefficients were fitted according to the experimental data of different relative densities and W contents in quasi-static compression. According to the numerical relationships between the relevant coefficients and the relative densities and W contents, the quasi-static mechanical constitutive model of W/PMMA composite microcellular foams with W contents of 0~60 wt % and relative densities of 0.15~0.55 were predicted. This study provided basic data for the optimal design of the W/PMMA composite microcellular foams and proposed a method for investigating the mechanical properties of composite microcellular foam materials. View Full-Text
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Zhu, Y.; Luo, G.; Zhang, R.; Liu, Q.; Sun, Y.; Zhang, J.; Shen, Q.; Zhang, L. Investigation of the Constitutive Model of W/PMMA Composite Microcellular Foams. Polymers 2019, 11, 1136.
Zhu Y, Luo G, Zhang R, Liu Q, Sun Y, Zhang J, Shen Q, Zhang L. Investigation of the Constitutive Model of W/PMMA Composite Microcellular Foams. Polymers. 2019; 11(7):1136.Chicago/Turabian Style
Zhu, Yuxuan; Luo, Guoqiang; Zhang, Ruizhi; Liu, Qiwen; Sun, Yi; Zhang, Jian; Shen, Qiang; Zhang, Lianmeng. 2019. "Investigation of the Constitutive Model of W/PMMA Composite Microcellular Foams." Polymers 11, no. 7: 1136.
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