Engineering and Materials and Computing and Informatics Research Seminar

Memory effect of paste and its visualization as desiccation crack patterns

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Seminars

As part of the School of Science and Technology's Joint Seminar Programme for the Engineering and Materials and Computing Informatics Research Centres, Professor Akio Nakahara, College of Science and Technology, Nihon University, presents: Memory effect of paste and its visualisation as desiccation crack patterns

  • From: Wednesday 29 August 2018, 1 pm
  • To: Wednesday 29 August 2018, 2 pm
  • Location: 015, CELS, Nottingham Trent University, Clifton Campus, Clifton Lane, Nottingham, NG11 8NS

Past event

Event details

As part of the School of Science and Technology's Joint Seminar Programme for the Engineering and Materials and Computing Informatics Research Centres, Professor Akio Nakahara, College of Science and Technology, Nihon University, presents: Memory effect of paste and its visualisation as desiccation crack patterns.

Abstract

A densely packed colloidal suspension, called paste, remembers the direction of its deformation under external field due to its plasticity, and the memory of such deformation can be visualised as a morphology of desiccation crack patterns. For example, when a paste remembers its deformation under vibrational motion, all primary desiccation cracks run in the direction perpendicular to the direction of the applied vibration [1]. On the other hand, when a paste remembers its flow motion, all primary desiccation cracks run in the direction parallel to the direction of the flow motion [2]. The magnetic paste remembers its deformation under magnetic field and, when it is dried, all primary cracks propagate along the direction of the applied magnetic field. The mechanism of memory of vibration can be explained by the residual tension theories [3-4], while the memory of flow can be reproduced by particle simulation under shear. By controlling imprinting, rewriting and erasing memories in paste, we can produce various types of desiccation crack patterns, such as cellular, radial, lamellar, ring, spiral, lattice, and so on.

This seminar is hosted by Dr Lucas Goehring

All Welcome

For any enquires please contact Dr Ian Shuttleworth

Location details

Room/Building:

015, CELS

Address:

Nottingham Trent University
Clifton Campus
Clifton Lane
Nottingham
NG11 8NS

Past event

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