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Title: Deformation and damage of random fibrous networks
Authors: Sozumert, Emrah
Farukh, Farukh
Sabuncuoglu, Baris
Demirci, Emrah
Acar, Memis
Pourdeyhimi, Behnam
Silberschmidt, Vadim V.
Keywords: Fibrous materials
Notch sensitivity
Deformation and damage
Mechanics of fibrous materials
Finite-element modelling
Orientation distribution
Issue Date: 2018
Publisher: © Elsevier
Citation: SOZUMERT, E. ... et al, 2018. Deformation and damage of random fibrous networks. International Journal of Solids and Structures, doi:10.1016/j.ijsolstr.2018.12.012.
Abstract: Fibrous networks are encountered in various natural and synthetic materials. Typically, they have random microstructures with complex patterns of fibre distribution. This microstructure, together with significant (in many cases) stretchability of such networks, results in a non-trivial load-transfer mechanism, different from that of continuous media. The aim of this study is to investigate evolution of local deformation, damage and fracture processes in fibrous networks. In order to do this, together with extensive experiments, discontinuous finite-element (FE) models with direct incorporation of microstructural features were developed using a parametric approach for specimens with various dimensions and different types of notches. These models, mimicking a microstructure of the selected fibrous network, were loaded by stretching along a principal direction. Discontinuous FE models provided data not only on a global response of the specimens but also on levels of stresses and strains in each fibre, forming the network. An effect of a notch shape on evolution of fibre strains as well as mechanisms and patterns of damage was investigated using experimental data and simulation results, assessing also toughness of specimens. Strain distribution over selected paths were tracked in notched specimens to quantify strain distributions in the vicinity of notch tips. The growth and patterns of local damage due to axial stretching obtained in advanced numerical simulations with the developed FE models demonstrated a good agreement with experimental observations.
Description: This paper is closed access until 8 December 2019.
Sponsor: The research leading to these results has received partial funding from the European Union Programme Horizon 2020 under Grant Agreement No H2020-MSCA-RISE-2014- 644175 MATRIXASSAY.
Version: Accepted for publication
DOI: 10.1016/j.ijsolstr.2018.12.012
URI: https://dspace.lboro.ac.uk/2134/36431
Publisher Link: https://doi.org/10.1016/j.ijsolstr.2018.12.012
ISSN: 0020-7683
Appears in Collections:Closed Access (Mechanical, Electrical and Manufacturing Engineering)

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