Experimental analysis of off-axis mechanical behaviors of PVC coated fabrics subjected to cyclic loading. (December 2019)

• Record Type: Journal Article
• Authors: Xu, Junhao; Zhang, Yingying; Wu, Meng; Zhao, Yushuai
• Is Part Of: Polymer testing. Volume 80(2019)
• Publication Date: 2019-12
• Subjects: PVC coated fabrics -- Off-axis mechanical behaviors -- Cyclic loading -- Ratcheting strain -- Strain decomposition; Polymers -- Testing -- Periodicals; Polymères -- Tests -- Périodiques; 620.1920287
• DOI: 10.1016/j.polymertesting.2019.106090
• Languages: English
• ISSNs: 0142-9418

Abstract

Abstract: This paper investigates the off-axis mechanical behaviors of PVC coated fabrics under cyclic loading. Based on the cyclic loading tests with different off-axis angles, stress amplitude, and loading rate, the ratcheting behaviors and the strain decomposition in the cyclic loading test were studied. The results show that the mechanical behaviors of PVC coated fabrics are anisotropic viscoelastic, which is mainly associated with the stress state of internal yarns. After the first unloading, the mechanical properties of PVC coated fabrics change most significantly and then they tend to be stable with the increasing of the cycle number. The strain of PVC coated fabrics under cyclic loading can be divided into elastic strain, recoverable viscous strain and unrecoverable plastic strain. After 25 days, the residual strain tends to be constant and the viscous strain disappears completely. Highlights: The off-axis mechanical behaviors of PVC coated fabrics were investigated. The ratcheting behaviors of PVC coated fabrics were assessed. Digital image correlation technology was used to measure the shape, displacement and strain of the full-court specimen in the study. The elastic strain, recoverable viscous strain and unrecoverable plastic strain are accurately measured in cyclic loading tests. The time required for the recoverable viscous strain of PVC coated fabrics to disappear completely is obtained.