Japan Geoscience Union Meeting 2014

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Symbol S (Solid Earth Sciences) » S-IT Science of the Earth's Interior & Techtonophysics

[S-IT38_30AM1] Rheology and Transport Phenomena of Geomaterials

Wed. Apr 30, 2014 9:00 AM - 10:45 AM 511 (5F)

Convener:*Tomohiro Ohuchi(Geodynamics Research Center, Ehime University), Osamu Kuwano(Japan Agency for Marin-Earth Science and Technology), Ichiko Shimizu(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo), Chair:Ichiko Shimizu(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo)

9:45 AM - 10:00 AM

[SIT38-04] Variety of memories of clay paste flows which can be visualized as desiccation crack patterns

*Akio NAKAHARA1, Yousuke MATSUO1, Takeshi OOSHIDA2, Michio OTSUKI3, So KITSUNEZAKI4 (1.College of Science and Technology, Nihon University, 2.Department of Mechanical and Aerospace Engineering, Tottori University, 3.Department of Materials Science, Shimane University, 4.Graduate School of Human Culture, Nara Women's University)

Keywords:desiccation crack pattern, rheology of clay paste, memory effect of flow

Due to its plasticity, a water-poor clay paste can remember the direction of vibration and flow that it suffered. The memory of flow in clay paste can be visialized as a morphology of crack pattern that appears when the clay paste is dried. When the clay paste remembers the flow direction, desiccation cracks run all parallel to the direction of the flow. Recently, we find that there are some different types of memory of flow, as the direction of crack propagation changes from parallel to perpendicular direction. We would like to discuss on the mechanism of the memory effect of flow.