標題: Characterizing mechanical properties of particulate nanocomposites using micromechanical approach
作者: Tsai, Jia-Lin
Tzeng, Shi-Hua
機械工程學系
Department of Mechanical Engineering
關鍵字: nanocomposites;MD simulation;micromechanical model;Young's modulus
公開日期: 1-十一月-2008
摘要: This research aims to propose a continuous micromechanical model for characterizing the mechanical properties of the nanocomposites containing silica nanoparticles embedded in polyimide matrix. The molecular structures of the nanocomposites were established through molecular dynamic ( MD) simulation, from which the non-bonded gap as well as the non-bonded energy between the nano-sized inclusion and the surrounding matrix were evaluated. It was postulated that the normalized non-bonded energy (non-bonded energy divided by surface area of the inclusion) is correlated with the degree of interfacial interaction. Subsequently, an effective interphase micromechanical model including inclusion, matrix and effective interphase was developed, in which the dimension of the effective interphase was assumed equal to the non-bonded gap and the corresponding elastic stiffness was calculated from the normalized non-bonded energy. Comparison of the results calculated from the micromechanical model and the MD simulation indicates that the effective interphase model is capable of describing Young's modulus of particulate nanocomposites with accuracy. In addition, it was revealed that when the particulate size decreases, the corresponding modulus of the nanocomposites increases.
URI: http://dx.doi.org/10.1177/0021998308095503
http://hdl.handle.net/11536/8186
ISSN: 0021-9983
DOI: 10.1177/0021998308095503
期刊: JOURNAL OF COMPOSITE MATERIALS
Volume: 42
Issue: 22
起始頁: 2345
結束頁: 2361
顯示於類別:期刊論文


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