Demirci, Emrah, Hou, Xiaonan, Acar, Memiş, Pourdeyhimi, Behnam and Silberschmidt, Vadim V. (2012) Numerical modelling of thermally bonded nonwovens : continuous and discontinuous approaches. Solid State Phenomena, Volume 188 . pp. 164-169. doi:10.4028/www.scientific.net/SSP.188.164 ISSN 1662-9779.

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Abstract

Nonwoven fabrics are web structures of randomly-oriented fibres, bonded by means of mechanical, thermal or chemical techniques. This paper focuses on nonwovens manufactured with polymer-based fibres and bonded thermally. During thermal bonding of such fibres, as a hot calender with an engraved pattern contacts the fibre web, bond spots are formed by melting of the polymer material. As a result of this bonding process, a pattern of bond points connected with randomly oriented polymer-based fibres form the nonwoven web. Due to their manufacturing-induced composite microstructure and random orientation of fibres, nonwovens demonstrate a complex mechanical behaviour. Two distinct modelling approaches were introduced to simulate the non-trivial mechanical response of thermally bonded nonwovens based on their planar density. The first modelling approach was developed to simulate the mechanical behaviour of high-density nonwovens, and the respective fabric was modelled with shell elements with thicknesses identical to those of the bond points and the fibre matrix having distinct anisotropic mechanical properties. Random orientation of individual fibres was introduced into the model in terms of the orientation distribution function in order to determine the material’s anisotropy. The second modelling approach was introduced to simulate low-density nonwovens, and it treated the nonwoven media as a structure composed of fibres acting as truss links between bond points.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	Solid State Phenomena
Publisher:	Scitec Publications Ltd.
ISSN:	1662-9779
Official Date:	May 2012
Dates:	Date Event May 2012 Available
Volume:	Volume 188
Page Range:	pp. 164-169
DOI:	10.4028/www.scientific.net/SSP.188.164
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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