Exploratory Research on the Fabrication of Specimens with Embedded State-Colored Cells

小行星9705801 现有的实验技术不能提供与不同加载速率下的局部化相关的内部相变的定量实时测量。 由于局部化通常伴随着局部加热，由于塑性功，这里提出了一个探索性的研究项目，制作嵌入状态着色细胞的实验样品，以测量实时相变。 提出了用一种光学性质随温度可逆变化的热致变色（TC）材料制成状态色电池的设想。 然后对这些试件进行单轴压缩试验，以研究不同加载速率下的内部相变。 由于TC材料在特定温度下的凝胶状态，用于所提出的测量的最终单元可能由许多直径小于1 mm的较小单元组成，每个单元覆盖一定的温度范围。 关于实际测量，预期细胞将经受适当波长的辐射以监测颜色变化。 嵌入状态着色细胞的实验样品的制造涉及化学，实验力学和材料科学的跨学科努力。 然而，如果该项目成功，将对本地化，实验力学和工业应用的建模产生重大影响。

9705801 Chen Existing, experimental techniques can not provide a quantitative real-time measurement of the internal phase transition associated with localization under different loading, rates. Since localization is usually accompanied by local heating due to plastic work, an exploratory research project is proposed here to fabricate the experimental specimens with embedded state-colored cells to measure the real-time phase transition. It is proposed that the state-colored cells be made of a certain kind of thermochromic (TC) materials, the optical properties of which are able to chance reversibly upon temperature. Uniaxial compressive tests are then performed with these specimens to investigate the internal phase transition under different loading- rates. Because of the gel state of TC materials at certain temperature, it is possible that the ultimate cell for the proposed measurement may be composed of many smaller cells with a diameter of less than I mm, each covering a range of temperatures. With regard tot he actual measurement, it is anticipated that the cell will be subjected to radiation of the appropriate wavelength(s) to monitor the color change. The fabrication of the experimental specimens with embedded state-colored cells involves interdisciplinary efforts from chemistry, experimental mechanics, and material science. If the project is successful, however, there will be a significant impact on the modeling of localization, experimental mechanics and industrial applications.