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Monitoring of Thermal and Deformation Fields of a Textile Subjected to Modulated Quasi-Static Tensile Test Using a Thermal Camera.

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Title: Monitoring of Thermal and Deformation Fields of a Textile Subjected to Modulated Quasi-Static Tensile Test Using a Thermal Camera.
Authors: Hussein, M.1 (AUTHOR) mahmoud.ahmed2013@gmail.com, Mathieu, D.1 (AUTHOR), L'hostis, G.1 (AUTHOR), Durand, B.1 (AUTHOR)
Source: Experimental Mechanics. Feb2026, Vol. 66 Issue 2, p363-380. 18p.
Subjects: Tensile tests, Thermography, Deformations (Mechanics), Dynamic stiffness, Technical textiles, Digital image correlation, Viscoelasticity
Abstract: Background: The mechanical behavior of textiles is highly dependent on their anisotropic and viscoelastic nature, necessitating advanced characterization techniques to capture both thermal and mechanical responses accurately. Conventional tensile tests often fail to provide sufficient insights into textiles' dynamic and heterogeneous behavior, particularly regarding dynamic stiffness evolution, energy dissipation, and structural integrity. Objective: This study investigates the use of thermal imaging combined with digital image correlation (DIC) to measure displacement fields and deformation, thereby enabling a more comprehensive assessment of textile mechanics under modulated quasi-static tensile loading. Methods: A textile specimen was subjected to a modulated quasi-static tensile test, where cyclic loading was superimposed on a quasi-static tensile strain. Infrared thermography was employed to monitor displacement fields and temperature variations, enabling the statistical analysis of deformation homogeneity, local stress evolution, and heat source localization. The complex modulus was analyzed to evaluate the fabric's viscoelastic behavior. Results: The proposed methodology successfully quantified displacement fields and revealed significant heterogeneities in textile deformation, especially between the warp and weft directions. The addition of modulation highlighted the fabric's viscoelastic properties, with a notable increase in dynamic stiffness beyond 45% strain. DIC analysis directly on thermal images simplified data processing, enabling the identification of heat sources in terms of amplitude and location. This approach also facilitated the quantification of structural transformations. Conclusions: This study demonstrates that thermal imaging can effectively capture both deformation and thermal fields, providing a robust method for textile characterization. Integrating a modulated quasi-static tensile test with thermal analysis enhances the understanding of textile mechanics. It offers a valuable framework for optimizing high-performance textiles across various applications. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Background: The mechanical behavior of textiles is highly dependent on their anisotropic and viscoelastic nature, necessitating advanced characterization techniques to capture both thermal and mechanical responses accurately. Conventional tensile tests often fail to provide sufficient insights into textiles' dynamic and heterogeneous behavior, particularly regarding dynamic stiffness evolution, energy dissipation, and structural integrity. Objective: This study investigates the use of thermal imaging combined with digital image correlation (DIC) to measure displacement fields and deformation, thereby enabling a more comprehensive assessment of textile mechanics under modulated quasi-static tensile loading. Methods: A textile specimen was subjected to a modulated quasi-static tensile test, where cyclic loading was superimposed on a quasi-static tensile strain. Infrared thermography was employed to monitor displacement fields and temperature variations, enabling the statistical analysis of deformation homogeneity, local stress evolution, and heat source localization. The complex modulus was analyzed to evaluate the fabric's viscoelastic behavior. Results: The proposed methodology successfully quantified displacement fields and revealed significant heterogeneities in textile deformation, especially between the warp and weft directions. The addition of modulation highlighted the fabric's viscoelastic properties, with a notable increase in dynamic stiffness beyond 45% strain. DIC analysis directly on thermal images simplified data processing, enabling the identification of heat sources in terms of amplitude and location. This approach also facilitated the quantification of structural transformations. Conclusions: This study demonstrates that thermal imaging can effectively capture both deformation and thermal fields, providing a robust method for textile characterization. Integrating a modulated quasi-static tensile test with thermal analysis enhances the understanding of textile mechanics. It offers a valuable framework for optimizing high-performance textiles across various applications. [ABSTRACT FROM AUTHOR]
ISSN:00144851
DOI:10.1007/s11340-025-01247-1