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An Experimental and Analytical Investigation on the Deformation of Inclined Metallic Fibres for Optimized Design of Fibrous Porous Materials

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Abstract

Background

Deformation properties of porous metallic fibre networks are strongly dependent on their architecture, mainly fibre orientation, besides being a function of constituent fibre material and its geometrical parameters. Hence, it is important to comprehend and evaluate the effect of individual fibre orientation and fibre-segment aspect ratio on the mechanical properties of porous metallic fibre networks.

Objective

To investigate the effect of fibre orientation on its deformation characteristics and to analytically explain the observed mechanical behaviour.

Methods

Present work captures the deformation of inclined copper fibres (in the range of 0° to 45°), mounted on a novel paper-tab framework, under tensile loading. A 1D analytical model has also been developed to elucidate the inclined fibre deformation and yield characteristics.

Results

An increase in fibre inclination angle (from 0° to 45°), exhibits a decreased yield force. The model validates the experiments, and for elastic region establishes that the axial, shear forces and bending moment increase with fibre inclination angle, where the increase in axial force is predominant. The model further establishes the effect of fibre-segment aspect ratio on the yield force of fibre networks and determines that increase in diameter of the fibres has the same effect as decrease in segment length with regards to these forces.

Conclusions

The study establishes the effect of fibre inclination angle on the deformation behaviour of porous metallic fibre network materials and can potentially be used to optimise their architecture for targeted applications.

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Acknowledgements

This work is part of the Early Career Research (ECR) grant award (Ref. no.: ECR/2016/001953) funded by Science and Engineering Research Board (SERB) of Department of Science and Technology (DST), India. One of the authors acknowledge the support. The authors acknowledge the technical support provided by Department of Applied Mechanics and the Department of Materials Science and Engineering, IIT Delhi. The authors also acknowledge Dr. Jayant Jain of IIT Delhi for providing the copper fibre material.

Funding

This work is part of the Early Career Research (ECR) grant award (Ref. no.: ECR/2016/001953) funded by Science and Engineering Research Board (SERB) of Department of Science and Technology (DST), India.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110 016, India

    A. Muzaffar, R. Prasad & S. Neelakantan

  2. Metallurgical and Materials Engineering Department, National Institute of Technology Srinagar, Srinagar, Jammu and Kashmir 190 006, India

    A. Muzaffar

  3. Department of Applied Mechanics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110 016, India

    S. Santapuri

Authors
  1. A. Muzaffar
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  2. S. Santapuri
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  3. R. Prasad
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  4. S. Neelakantan
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Contributions

Aravi Muzaffar: Investigation, Methodology, Data Curation, Formal analysis, Writing – Original Draft; Sushma Santapuri: Methodology, Validation, Data Curation, Visualization, Writing – Review & Editing; Rajesh Prasad: Supervision, Visualization, Writing – Review & Editing; Suresh Neelakantan: Conceptualization, Supervision, Project administration, Resources, Writing – Review & Editing, Funding acquisition.

Corresponding author

Correspondence to S. Neelakantan.

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Muzaffar, A., Santapuri, S., Prasad, R. et al. An Experimental and Analytical Investigation on the Deformation of Inclined Metallic Fibres for Optimized Design of Fibrous Porous Materials. Exp Mech 62, 427–439 (2022). https://doi.org/10.1007/s11340-021-00780-z

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