Dynamic response of thermally bonded bicomponent fibre nonwovens
Emrah Demirci
Memis Acar
Behnam Pourdeyhimi
Vadim Silberschmidt
2134/8736
https://repository.lboro.ac.uk/articles/conference_contribution/Dynamic_response_of_thermally_bonded_bicomponent_fibre_nonwovens/9556262
Having a unique microstructure, nonwoven fabrics possess distinct mechanical properties,
dissimilar to those of woven fabrics and composites. This paper aims to introduce a methodology
for simulating a dynamic response of core/sheath-type thermally bonded bicomponent fibre
nonwovens. The simulated nonwoven fabric is treated as an assembly of two regions with distinct
mechanical properties. One region - the fibre matrix – is composed of non-uniformly oriented
core/sheath fibres acting as link between bond points. Non-uniform orientation of individual fibres
is introduced into the model in terms of the orientation distribution function in order to calculate the
structure’s anisotropy. Another region – bond points – is treated in simulations as a deformable
bicomponent composite material, composed of the sheath material as its matrix and the core
material as reinforcing fibres with random orientations. Time-dependent anisotropic mechanical
properties of these regions are assessed based on fibre characteristics and manufacturing parameters
such as the planar density, core/sheath ratio, fibre diameter etc. Having distinct anisotropic
mechanical properties for two regions, dynamic response of the fabric is modelled in the finite
element software with shell elements with thicknesses identical to those of the bond points and fibre
matrix.
2011-08-18 12:08:15
Nonwoven
Orientation distribution function
Bicomponent fibre
Finite element
Anisotropy
Composite material
Dynamic response
Mechanical Engineering not elsewhere classified