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Prediction of mechanical properties of knitted fabrics under tensile and shear loading: Mesoscale analysis using representative unit cells and its validation

Dinh, Tien Dung ; Weeger, Oliver ; Kaijima, Sawako ; Yeung, Sai-Kit (2022):
Prediction of mechanical properties of knitted fabrics under tensile and shear loading: Mesoscale analysis using representative unit cells and its validation. (Postprint)
In: Composites Part B: Engineering, 148, Elsevier, ISSN 1359-8368,
DOI: 10.26083/tuprints-00019839,
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Item Type: Article
Origin: Secondary publication service
Status: Postprint
Title: Prediction of mechanical properties of knitted fabrics under tensile and shear loading: Mesoscale analysis using representative unit cells and its validation
Language: English
Abstract:

This article presents a numerical framework to predict the mechanical behavior of knitted fabrics from their discrete structure at the fabric yarn level, i.e., the mesostructure, utilizing the hierarchical multiscale method. Due to the regular distribution of yarn loops in a knitted structure, the homogenization theory for periodic materials can be employed. Thus, instead of considering the whole fabric sample under loading, a significantly less computationally demanding analysis can be done on a repeated unit cell (RUC). This RUC is created based on simple structural parameters of knitted yarn loops and its fabric yarns are assumed to behave transversely isotropic. Nonlinear finite element analyses are performed to determine the stress fields in the RUC under tensile and shear loading. During this analysis, contact friction among yarns is considered as well as the periodic boundary conditions are employed. The macroscopic stresses then can be derived from the stress fields in the RUC by means of the numerical homogenization scheme. The physical fidelity of the proposed framework is shown by the good agreement between the predicted mechanical properties of knitted fabrics and corresponding experimental data.

Journal or Publication Title: Composites Part B: Engineering
Journal volume: 148
Publisher: Elsevier
Collation: 16 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Cyber-Physical Simulation (CPS)
Date Deposited: 05 Jan 2022 14:07
Last Modified: 05 Jan 2022 14:07
DOI: 10.26083/tuprints-00019839
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-198399
Additional Information:

Keywords: Knitted fabrics, Multiscale analysis, Numerical homogenization method, Periodic boundary conditions

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19839
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