# Use of a coupled mechanical-acoustic computational model to identify failure mechanisms in paper production

Kao, D, Pericleous, Koulis A., Graham, Deryn and Knight, Brian
(2006)
*Use of a coupled mechanical-acoustic computational model to identify failure mechanisms in paper production.*
In: Proceedings of the Thirteenth International Congress on Sound and Vibration, ICSV13, 2-6 Jul 2006, Vienna, Austria.

## Abstract

In this paper, a couple mechanical-acoustic system of equations is solved to determine the relationship between emitted sound and damage mechanisims in paper under controlled stress conditions. The simple classical expression describing the frequency of a plucked string to its material properties is used to generate a numberical representation of the microscopic structue of the paper, and the resulting numerical model is then used to simulate the vibration of a range of simple fibre structures when undergoing two distinct types of damange mechanisms: (a)fibre/fibre bond failure, (b) fibre failure. The numercial results are analysed to determine whether there is any detectable systematic difference between the resulting acoustic emissions of the two damage processes. Fourier techniques are then used to compare th computeed results against experimental measurements. Distinct frequency components identifying each type of damage are shown to exist, and in this respect theory and experiments show good correspondece. Hence, it is shown, that althrough the mathematical model represents a grossly-simplified view of the complex structure of the paper, it nevertheless provides a good understanding of the underlying micro-mechanisms characterising its proeperties as a stress-resisting structure. Use of the model and acoompanying software will enable operators to identify approaching failure conditions in the continuous production of paper from emitted sound signals and take preventative action.

Item Type: | Conference or Conference Paper (Paper) |
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Additional Information: | Proceedings published on CD only, edited by J. Eberhardsteiner, H.A. Mang, H. Waubke. |

Uncontrolled Keywords: | coupled mechanical-acoustic system, paper, fibre failure, fibre bond failure |

Subjects: | Q Science > Q Science (General) T Technology > T Technology (General) |

Pre-2014 Departments: | School of Computing & Mathematical Sciences > Department of Information Systems & Digital Media School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis School of Computing & Mathematical Sciences School of Computing & Mathematical Sciences > eCentre School of Computing & Mathematical Sciences > Computer & Computational Science Research Group School of Computing & Mathematical Sciences > Department of Computer Science School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis > Computational Science & Engineering Group |

Related URLs: | |

Last Modified: | 14 Oct 2016 09:02 |

URI: | http://gala.gre.ac.uk/id/eprint/959 |

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