Japan Long-Term Visit: Cooperative Study of Sea Ice Physics

该奖项将使蒙大拿州立大学的罗伯特·布朗教授 与藤野一夫博士和川村俊之博士合作， 北海道大学为期六个月。 他们将调查 海洋冰晶的形成和破坏， 这种晶体的微观结构基础的本构理论。 大 海冰的单晶将被生长和测试， 数据将被用来验证一个弹粘塑性方程， 基于微观动力学和热力学单晶体 原则 最终，这项工作将扩展到描述 柱状颗粒多晶海冰。 这项研究的目的是增加我们对 海冰物理学 大型的海洋冰晶将通过 日本合作者完善的技术， 美国研究人员开发的压力分析将用于 为观察到的增长构建理论框架， 随后的微裂纹动力学。 测试计划将涉及， 除了对生长在北海道的单个冰晶的研究外， 大学实验室，结果与获得的结果的核对 在海冰研究实验室获得的关于天然海冰的数据， 北海道岛的北方海岸。 这项工作具有重要意义 对海洋航行的影响。

This award will enable Prof. Robert Brown of Montana State University to collaborate with Dr. Kazuo Fujino and Dr. Toshiyuki Kawamura of Hokkaido University over a period of six months. They will investigate the formation and destruction of sea ice crystals in order to develop a microstructurally based constitutive theory for such crystals. Large single crystals of sea ice will be grown and tested, and the resulting data will be used to validate an elastic-viscoplastic equation for a single ice crystal based on microdynamical and thermodynamic principles. Eventually this work will be extended to a description of columnargrain polycrystalline sea ice. The purpose of this research is to increase our understanding of the physics of sea ice. Large sea ice crystals will be grown using techniques perfected by the Japanese collaborator, and techiques of stress analysis developed by the U.S. investigator will be used to construct a theoretical framework for the observed growth and subsequent microcracking dynamics. The testing program will involve, in addition to studies of single ice crystals grown in the Hokkaido University laboratory, reconciliation of results with those obtained on natural sea ice obtained at the Sea Ice Research Laboratory on the northern shore of the island of Hokkaido. This work has important implications in the field of ocean navigation.