Lee Dock-Jin, Kim Young-Jin, Kim Moon-Ki, Choi Jae-Boong, Chang Yoon-Suk, Liu Wing Kam
SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, 300 Chunchun, Jangan, Suwon, Kyonggi 440-746, Republic of Korea.
J Nanosci Nanotechnol. 2011 Jan;11(1):619-23. doi: 10.1166/jnn.2011.3247.
New advanced composite materials have recently been of great interest. Especially, many researchers have studied on nano/micro composites based on matrix filled with nano-particles, nano-tubes, nano-wires and so forth, which have outstanding characteristics on thermal, electrical, optical, chemical and mechanical properties. Therefore, the need of numerical approach for design and development of the advanced materials has been recognized. In this paper, finite element analysis based on multi-resolution continuum theory is carried out to predict the anisotropic behavior of nano/micro composites based on damage mechanics with a cell modeling. The cell modeling systematically evaluates constitutive relationships from microstructure of the composite material. Effects of plastic anisotropy on deformation behavior and damage evolution of nano/micro composite are investigated by using Hill's 48 yield function and also compared with those obtained from Gurson-Tvergaard-Needleman isotropic damage model based on von Mises yield function.
新型先进复合材料近来备受关注。特别是，许多研究人员对基于填充有纳米粒子、纳米管、纳米线等的基体的纳米/微复合材料进行了研究，这些复合材料在热、电、光、化学和机械性能方面具有出色的特性。因此，人们已经认识到对先进材料进行设计和开发时采用数值方法的必要性。本文基于多分辨率连续体理论进行有限元分析，以通过胞元建模基于损伤力学预测纳米/微复合材料的各向异性行为。胞元建模从复合材料的微观结构系统地评估本构关系。利用希尔48屈服函数研究了塑性各向异性对纳米/微复合材料变形行为和损伤演化的影响，并与基于冯·米塞斯屈服函数的古尔松-特弗加德-内德曼各向同性损伤模型所得结果进行了比较。
