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Cited by 2Polymer crystallization and propertiesOptical measurement and interference techniquesElasticity and Material Modeling

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Bulge test technique and digital image correlation for the determination of the biaxial behavior of polymeric films

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Kharrat, Fatma, Chaari, Rania, Khlif, Mohamed, Hilliou, Loic, Covas, José António, Haboussi, Mohamed, Bradai, Chedly·2023·Materials Testing
DOI 10.1515/mt-2023-0139
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Abstract

Materials can display multiple mechanical behaviors when they are biaxially stressed. In this research work, films obtained through the blowing process were investigated in order to compare the mechanical properties and behavior of the film under uniaxial and biaxial stress conditions. Bulge test coupled with a continuous full-field strain measurement was undertaken in order to characterize polymeric film in a biaxial stress state. As far as this study is concerned, a laboratory-made pneumatic bulge test machine was used for the determination of the biaxial behavior of a 50 μm thickness PLSF (modified PLA) film. 3D-digital image correlation (3D-DIC) technique was used in order to compute the strain field continuously during the test. Tensile test was equally performed on the film along its machine direction (MD) and transverse direction (TD). Strain field distribution in the film sample was analyzed and compared in both tests. The tensile test results displayed an isotropic behavior of the film in both directions. However, a difference in the strain at break was noticed because of the thickness instability along the TD. The comparison between uniaxial and biaxial properties resulted in almost the same properties with respect to the Young Modulus as well as the tensile strength.

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Metadata

Authors
Kharrat, F., Chaari, R., Khlif, M., Hilliou, L., Covas, J. A., Haboussi, M., & Bradai, C.
Affiliations
  • University of Sfax (TN)
  • University of Minho (PT)
  • Centre National de la Recherche Scientifique (FR)
  • Laboratory of Electromechanical Systems (LASEM) , National Engineering School of Sfax (ENIS) , University of Sfax , B.P.W. 3038 , Sfax , Tunisia
Corresponding author
Kharrat, Fatma
ORCID
Venue
Materials Testing
Publisher
Walter de Gruyter GmbH
Published
2023-08-24
Volume
65
Issue
10
Pages
1489-1497
ISSN
  • 0025-5300 (ISSN-L)
  • 2195-8572
DOI
10.1515/mt-2023-0139
OpenAlex
W4386120361
Cited by
2
References
33
Citations by year
2025: 2
FWCI
0.16
Type
journal article
Language
en
Open access
Licence
cc-by-nc-nd
Locations
  • Materials Testing (publishedVersion)
  • Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) (submittedVersion, cc-by-nc-nd)
Topics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Optical measurement and interference techniques
  • Physical Sciences › Engineering › Biomedical Engineering › Elasticity and Material Modeling
Keywords
bulge test, digital image correlation, polymer films, blown film, uniaxial tensile testing, strain distribution, Young's modulus, tensile strength, isotropy

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