Investigation into the Role of Z-Fiber Orientation in Low-Velocity Impact Behavior of Sandwich-Structured Composite: Numerical and Experimental Analysis
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引用次数: 0
Abstract
Sandwich composites reinforced with weft-knitted spacer fabrics (WKSF) have a high potential for use in low-velocity impact applications due to the presence of Z-fibers. The present research fabricated sandwich composites using C-glass weft-knitted spacer fabrics and epoxy resin. Three different architectures, i.e., 1 × 1-Rib gaiting, 3 × 3-Rib gaiting, and 5 × 5-Rib, were used to achieve different orientations of Z-fibers. Low-velocity impact test was carried out on the prepared samples. Also, the impact behavior of the sandwich composite was simulated using ABAQUS standard/explicit. The experimental and numerical results show that Z-fibers affect the low-velocity impact behavior of sandwich composites. Based on experiments, the lower maximum reduced acceleration of the impactor and higher contact duration in 3 × 3 Rib-gating means that this specimen has more impact resistance. The indentation percentages of 1 × 1-Rib gaiting, 3 × 3-Rib gaiting, and 5 × 5-Rib gaiting samples were 37%, 34%, and 91%, respectively. In addition, considering the thickness of composites, the experimental indentation of 3 × 3 Rib-gating is lower than other samples which is confirmed by the numerical displacement of the impactor. Numerical analysis showed that the elastic modulus of Z-fibers, its position, and boundary conditions affected stress distribution. The discontinuity among Z-fibers prevents the transfer of stress from the impact area to the outside of this area. Generally, composites reinforced with 3 × 3-Rib gaiting structures show the highest resistance to impact stiffness.
期刊介绍:
-Chemistry of Fiber Materials, Polymer Reactions and Synthesis-
Physical Properties of Fibers, Polymer Blends and Composites-
Fiber Spinning and Textile Processing, Polymer Physics, Morphology-
Colorants and Dyeing, Polymer Analysis and Characterization-
Chemical Aftertreatment of Textiles, Polymer Processing and Rheology-
Textile and Apparel Science, Functional Polymers