Establishment and development of constitutive models for particle dispersesd type intelligent composite material

本研究的目标是开发和建立一个严谨的材料本构模型，准确地预测智能复合材料的宏观行为。智能材料具有分散或规则排列在基质材料介质中的多个微致动器。通过在分布、方向和/或体积分数上适当地布置微致动器，可以执行精确和指定的功能。在目前的发展中，考虑使用相变合金作为执行器，以使智能材料具有高度的机械功能。为此，从我们以前的发展中选择了唯一可服从的模型，即自洽型本构模型SCC-LRM。该模型较好地描述了含有各种颗粒夹杂物的复合材料的宏观行为。在本模型中，压电弹性材料或相变…更多的离子材料被认为是微执行器的作用。虽然这些材料作为整体材料时变形行为的自由度较低，但通过选择纤维等微观颗粒形状，可以获得自由度较高的高性能。然而，这种智能材料的宏观材料的行为非常复杂，对于智能材料的实际应用来说，介观材料设计和宏观功能之间的联系是必不可少的。在这项研究中，目标是为这种智力材料建立一个本构关系。为达到本研究的目的，本研究采用了本课题组开发的自洽型SCC-LRM模型。特别是考虑了相邻粒子间相互干扰引起的细观不均匀性和非线性两方面的影响。由于传统平均场理论已被广泛应用于复合材料技术领域，可以说，SCC-LRM模型的出现具有重要意义。同时，建立了应力应变在相中分布的局部化刚性模型。并用分析结果验证了该方法在整个体积分数范围内具有很高的精度。因此，对于复合材料的非线性问题，如果不采用考虑应力应变分布的最小二乘法，就不可能发展出具有本研究意义的本构关系。较少

The objectives of this research is to develop and establish a rigorous material constitutive model that accurately predicts the macro-behavior of an intelligent composite material. The intelligent material has a number of micro-actuators that are dispersed or regularly arrayed in the medium of the matrix m material. By properly arranging the micro-actuators in distribution, direction, and/or volume fraction, a precise and designated function can be performed. In the present development a phase transforming alloy is considered for taking the role of the actuator so that the intelligent material may have a high degree of mechanical function. For this end, the only amenable model is selected from our previous developments, that is a self-consistent type constitutive model, SCC-LRM. The model describes with a good accuracy the macroscopic behavior of the composite that contains particle inclusions of various types of grains.In the present model, piezo elastic materials or phase transformat … More ion materials are considered to take the role of the micro-actuator. Although the degree of freedom of deformation behavior is low when those materials were used as monolith material, it is possible to give a high performance that the degree of freedom is high by choosing some microscopic particle shape such as fiber. However, the behavior of the macro-material of such intelligence material is very complicated and is not established yet For a practical use of the intelligent material, a link between the meso-material design and the macro-function is essential. In this study, the objective is set to establish a constitutive law for such intelligence m material. For the objective of this research, the self-consistent type SCC-LRM model, which has been developed by our group, was used. Especially in which, two effects, namely the meso-inhombgeneity and non linearity caused by interference between adjacent particles, are accounted for. It can be said that the emergence of the SCC-LRM model has an important meaning, since the conventional mean field theory has been used in the wide area of composite material technology. In the meantime, authors developed Localized Rigidity Model (LRM) in which stress and strain were distributed in the phase. And it was verified with the result of analysis that the accuracy is very high in the whole range of volume fraction. Thus, it is advocated that the development of a constitutive law with the meaningful performance in this study is impossible without the employment of the LRM which considered the distribution of stress and strain for the nonlinearproblem of composite material. Less