Shape Effect Analysis of the Mechanical Properties of PVC‐Coated Fabrics under Off‐Axis Tension

Abstract

This paper selects polyvinyl chloride- (PVC-) coated fabrics to study its off-axial tensile behaviors under different off-axis angles including 0°, 15°, 30°, 45°, 60°, 75°, and 90°. In the experiment, dumbbell-shaped and strip-shaped specimens are analyzed for shape effect. The variations in the strain distribution are studied by using digital image correlation (DIC) noncontact full-field measurement system. The shape and off-axis angle of specimens are analyzed to predict the influences of shape effect. The results show that the longitudinal strain and shear strain of the coated fabrics are obviously symmetrical to the off-axis direction. The shear strain distribution of the two kinds is basically the same, but the longitudinal strain fields are different. The off-axis tensile properties of the material are obviously anisotropic and nonlinear. The tensile testing curve of the specimens mainly consists of three stages: initial linear stage, deformation strengthening stage, and stress strengthening stage. At 0°, the tensile strength is the largest and the elongation at break is the smallest. In contrast, at 45°, the elongation at break is the highest and the tensile strength was the smallest. The properties under the other off-axis angles were between these two extremes.

Numerical investigation on central tearing behaviors and propagation mechanisms of coated warp-knitted fabrics

“…[5][6][7][8][9] Among them, the PVC coated plain weave fabric has been frequently considered as research objects to explore the mechanical properties of architectural membrane materials. 10 However, due to the unique woven structure, the utilizations of the physical properties of woven yarns and tensile strength for the PVDF coated warp-knitted fabric are significantly higher than that of the plain weave fabrics. 11 Especially in the central tearing test, the warp-knitted fabrics are obviously stronger than the plain weave fabrics in terms of the tearing strength and force to resist crack propagation owing to yarn gathered.…”

Mechanical properties of the surface membrane of lattice spacer-fabric flexible inflatable composites

“…Rajan 18 and others [19][20][21] studied the influence of preparation parameters for spacer fabric on the properties of composite materials. Xu et al [22][23][24][25][26] studied the elastic constitutive model of PVC composites under the conditions of cyclic loading and rear cut, only limited to membrane prepared by coating a single-layer fabric. Zhang et al 27 studied the compression properties of lattice spacer-fabric flexible inflatable composites to enhance compression resistance; apart from this, there is no more research on lattice spacer-fabric flexible inflatable composites which is still in infancy and needs further exploration.…”