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Experimental assessment and interpretation of biaxial material parameter variation of a polyester-PVC fabric
Book Contribution - Book Chapter Conference Contribution
Designing tensile fabric structures can be rather challenging due to the relatively complicated mechanical response of the coated textiles used in these structures. Its composition of interwoven fibres surrounded by different interacting layers of coating, and a lack of normative documents, assessing and interpreting a fabric’s mechanical response unambiguously is challenging and requires a great deal of experience and expertise.
Through various biaxial tests on a single Type II polyester-PVC material, and the utilisation of different test and interpretation methods, the inherent variability of the measured mechanical response and derived material constants could be assessed in function of test and interpretation methodology. By then relating these variations to the respective alteration in test or interpretation methodology, several important relations can be derived between the test methodology and derived stress-strain response/material constants.
The presented paper compares various biaxial test and interpretation procedures and shows that altering any of these can have a significant impact on the results, even when the test is conducted on the same batch of material and within the same test environment. The obtained results not only illustrate the need for a unified international framework for testing of fabrics, but also the importance of interpreting test results and acknowledging the uncertainty/variability on the obtained results.
Through various biaxial tests on a single Type II polyester-PVC material, and the utilisation of different test and interpretation methods, the inherent variability of the measured mechanical response and derived material constants could be assessed in function of test and interpretation methodology. By then relating these variations to the respective alteration in test or interpretation methodology, several important relations can be derived between the test methodology and derived stress-strain response/material constants.
The presented paper compares various biaxial test and interpretation procedures and shows that altering any of these can have a significant impact on the results, even when the test is conducted on the same batch of material and within the same test environment. The obtained results not only illustrate the need for a unified international framework for testing of fabrics, but also the importance of interpreting test results and acknowledging the uncertainty/variability on the obtained results.
Book: Proceedings of the TensiNet Symposium 2019 Softening the Habitats
Pages: 366-377
Number of pages: 11
Publication year:2019
Keywords:Biaxial testing, Computational simulation, Polyester-PVC, Fabric, Tensile surface structure
Accessibility:Open