Harmonic System Design for Materials

在“智能材料与结构”新领域，正在尝试在碳纤维增强塑料等传统结构材料中嵌入传感材料和活性材料等功能材料。为了将这些极不相同的材料结合起来，成功地实现复杂的结构材料系统，必须建立材料的谐波系统设计。本研究的重要成果是提出并论证了复合材料等复杂结构材料的原始概念，将其设计理念从传统的刚性设计转变为创新的“主动结构材料设计”，允许或最大化地驱动和使传感实现智能和简单的结构材料系统。在本研究中，通过创新和简单的思路和工艺，在连续纤维复合材料的基础上开发了几种类型的材料。主要包括：在不使用活性材料的情况下，驱动由纤维不均匀分布引起的热变形引起的更多材料系统，这通常被认为是一种消极现象，但在本研究中得到了积极的利用，以及开发适合每种材料系统的原始和简单的传感器。主要研究结果如下：主要以铝为主体材料，针对高温应用，在某些情况下也采用了镍。为了使其单向驱动，将CFRP（碳纤维增强塑料）、SiC纤维、不锈钢纤维等低CTE（热膨胀系数）材料与主体材料不均匀结合，并阐明其性能。其中一些材料是用原始材料和方法功能化的。例如，仅使用氧化钛纤维就开发了一种用于主动形状控制的创新温度和应变传感器以及用于驱动的加热器，并发现其性能非常令人满意。少

In the new field of "Smart Materials and Structures," functional materials such as sensing materials and active materials are tried to be embedded in conventional structural materials such as carbon fiber reinforced plastics. In order to combine those extremely dissimilar materials and realize complex structural material systems successfully, harmonic system design for materials has to be established. Important results of this study are the proposal and demonstrations of the original concept to sophisticate structural materials such as composite materials by changing their designing concept from the conventional rigid design to the innovative one "active structural materials design" which allows or maximizes, actuation and enables sensing to realize smart and simple structural material systems. In this study, several types of materials were developed based on continuous fiber composites through innovative and simple ideas and processes. The main part consists of actuation of structural … More material systems caused by thermal deformation due to non-uniform distribution of fibers without using active materials, which is generally regarded as a negative phenomenon but is used positively in this study, and developments of original and simple sensors to be suitable for each material system. The major results obtained are as follows : Aluminum was mainly used as the host material, and nickel was also used in some cases aiming at higher temperature applications. To enable their unidirectional actuation, low CTE (coefficient of thermal expansion) materials such as CFRP (carbon fiber reinforced plastics), SiC fiber and stainless steel fiber were non-uniformly combined with the host materials, and their performances were clarified. Some of those materials were functionalized with original materials and methods. For example, an innovative temperature and strain sensor for active shape control as well as heater for actuation was developed simply by using oxidized titanium fiber, and the performances were found to be highly acceptable. Less