IUTAM Symposium on Modelling Nanomaterials and Nanosystems

IUTAM Symposium on Modelling Nanomaterials and Nanosystems
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IUTAM 纳米材料和纳米系统建模研讨会

DOI:
10.1007/978-1-4020-9557-3_3
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发表时间:
2009
期刊:
--
影响因子:
--
通讯作者:
Figiel L
Figiel L
中科院分区:
--
文献类型:
--
作者:
Figiel L

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这项工作旨在开发一个连续的,多尺度的,基于物理的层状硅酸盐纳米复合材料的形成过程的模型,基于聚对苯二甲酸乙二酯(PET)基质,可能用于包装。解决这一挑战的方法是:(1)将基于物理的PET模型应用到基于有限元的程序ABAQUS中,(2)具有指定形态的反映透射电子显微镜图像的RVEs,以及(3)非线性计算均化。因此,基于二维两尺度有限元模拟的双轴变形(恒宽)能够提取不同硅酸盐含量和加工温度下的宏观应力-应变曲线。特别是,在形态变化及其对宏观应力响应的影响方面捕捉到了有趣的特征:(A)颗粒重取向和显著弯曲引起的形态变化,(B)由于血小板重取向和局部应变硬化而导致的宏观应变硬化,(C)促进血小板排列,以及通过剪切为主的变形和温度升高来促进章鱼状血小板的分层。
This work aims to develop a continuum, multi-scale, physically-based model of the forming process for layered-silicate nanocomposites based on poly (ethylene terephthalate)(PET) matrices, as might be used for packaging. This challenge is tackled using:(1) a physically-based model of PET implemented into the FEM-based code ABAQUS,(2) RVEs with prescribed morphologies reflecting TEM images, and (3) nonlinear computational homogenisation. As a result, 2-D two-scale FEM-based simulations under biaxial deformations (constant width) enabled the extraction of macroscopic stress-strain curves at different silicate contents and processing temperatures. In particular, interesting features in terms of morphology changes and its impact on the macroscopic stress response were captured:(a) morphology change by particle re-orientation and pronounced bending,(b) macroscopic strain hardening due to platelet re-orientation and local strain stiffening,(c) facilitated platelet alignment, and platelet delamination in tactoids through sheardominated deformations and increasing temperature.
各向同性脆性固体断裂建模的非线性弹性
DOI: 10.1115/1.1636795
发表时间: 2004
期刊: Journal of Applied Mechanics
影响因子: --
作者:
K. Volokh
通讯作者: K. Volokh
DOI: 10.1115/1.3138417
发表时间: 1983-01-01
影响因子: 1.7
作者:
CHUONG, CJ;FUNG, YC
通讯作者: FUNG, YC
从软化超弹性的角度来看断裂韧性
DOI: 10.1016/j.jmps.2008.02.009
发表时间: 2008
影响因子: 5.3
作者:
K. Volokh;P. Trapper
通讯作者: P. Trapper