| 非均匀微极介质的有效性质分析 |
| |
| 引用本文： | 胡更开,刘晓宁,荀飞.非均匀微极介质的有效性质分析[J].力学进展,2004,34(2):195-214. |
| |
| 作者姓名： | 胡更开 刘晓宁 荀飞 |
| |
| 作者单位： | 北京理工大学理学院力学系 |
| |
| 基金项目： | 国家自然科学基金(19802003)，国家杰出青年基金(10325210) |
| |
| 摘 要： | 首先讨论了不同尺度关系下宏细观
过渡方法,然后重点介绍了尺度关系满足L>>l>>A ≈lm时(适用于金
属基复合材料,泡沫基复合材料和纳米复合材料等),构元材料看作微极介质,而均质
化后的材料仍可看作传统Cauchy介质时的解析弹塑性细观力学方法.在这样的理论
框架下,细观结构的尺度影响可作为变量引入细观力学模型,并且当A>>lm 时,
该方法自然退化成传统的细观力学方法.
|
| 关 键 词： | 微极介质 复合材料 细观力学 弹塑性 尺度效应 |
MICROMECHANICS OF HETEROGENEOUS MICROPOLAR MEDIUMS |
| |
| HU Gengkai,LIU Xiaoning,XUN Fei.MICROMECHANICS OF HETEROGENEOUS MICROPOLAR MEDIUMS[J].Advances in Mechanics,2004,34(2):195-214. |
| |
| Authors: | HU Gengkai LIU Xiaoning XUN Fei |
| |
| Affiliation: | HU Gengkai,LIU Xiaoning,XUN Fei Department of Applied Mechanics,Beijing Institute of Technology,Beijing 100081 |
| |
| Abstract: | Different homogenization schemes are discussed in view
of the order relations for the different length scales. The emphasis is then
placed on the micro-macro transition from local micropolar mediums to a
homogenized Cauchy medium, suitable for the following order relation of the
length scales $L \gg l \gg A \approx l_m $. The microstructural size effect
can be naturally taken into account in the proposed homogenization scheme.
This method is useful for the metal matrix composites, foam matrix
composites and nanocomposites, in which the microstructural length scales of
the matrix are important compared to that of the reinforced phase. |
| |
| Keywords: | micropolar medium micromechanics composite elastic-plastic property size effect |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《力学进展》浏览原始摘要信息 |
|
点击此处可从《力学进展》下载全文 |
|
