Microscopic mechanical behavior of reticulate carbon nanotube reinforced epoxy composites

作者：Liu Xia; Yang Qingsheng^*

来源：Acta Materiae Compositae Sinica, 2012, 29(3): 173-178.

DOI：CNKI:11-1801/TB.20120106.1506.022

• Effective mechanical properties
• Effective stiffness
• Influence degree
• Mechanical behavior
• Microscopic models
• Reinforced epoxy
• Structural characteristics
• Two-scale expansions
• Uniform distribution
• Vapor flows
• Y-junctions
• Young'
• s Modulus

A three dimensional microscopic model of the reticulate carbon nanotube/epoxy (R-CNT/EP) composites was established according to its structural characteristics based on the assumption of the uniform distribution of R-CNT. The effective stiffness coefficients and Young';s modulus of the R-CNT/EP composite were calculated by two-scale expansion method. It is shown that the mechanical properties of the R-CNT/EP composite are anisotropic and the strength along the direction of the vapor flow is much higher than that in other directions. The shape of the R-CNT plays an important role on the mechanical properties of the R-CNT/EP composite, and the effective stiffnesses and Young';s modulus of the R-CNT/EP composites are the highest when the angles of the Y-junctions are equal. All of the effective stiffnesses and Young';s modulus of the R-CNT/EP composites are enhanced with the increase of volume fraction of R-CNT, but the influence degrees are different.

• 出版日期2012
• 单位北京大学