Failure behaviors of single high-performance fibers under transverse dynamic cut

Gao, Jinling; Lim, Boon Him; Zhai, Xiaoling; Nie, Yizhou; Kedir, Nesredin; Chen, Weinong

doi:10.1016/j.ijimpeng.2020.103660

Cited by 13 publications

(5 citation statements)

References 38 publications

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“…Although for the 20-micron indenter, a tensile failure of some fibrils is observed at one end of the failed fiber as shown in all its Figure 6a,c,e. Gao et al [26,27] and Hudspeth et al [13] have also reported similar failure images in their study on transverse failure of SK-76 fibers. However, the failure surfaces shown here for the 20-micron indenter (for failure angles 26 • (as shown later in Figure 9) are in contrast with those reported in [13] for SK-76 single fibers which fail mainly via fibrillation for failure angles up to 40 • and shear failure for failure angles at 50 • .…”

Section: Transverse Loading-the Effect Of Angle and Indenter Geometrysupporting

confidence: 64%

Experimental Investigation of Transverse Loading Behavior of Ultra-High Molecular Weight Polyethylene Yarns

Shah

Sockalingam

2020

Fibers

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Ultra-high molecular weight polyethylene (UHMWPE) Dyneema® SK-76 fibers are widely used in personnel protection systems. Transverse ballistic impact onto these fibers results in complex multiaxial deformation modes such as axial tension, axial compression, transverse compression, and transverse shear. Previous experimental studies on single fibers have shown a degradation of tensile failure strain due to the presence of such multi-axial deformation modes. In this work, we study the presence and effects of such multi-axial stress-states on Dyneema® SK-76 yarns via transverse loading experiments. Quasi-static transverse loading experiments are conducted on Dyneema® SK-76 single yarn at different starting angles (5°, 10°, 15°, and 25°) and via four different indenter geometries: round (radius of curvature (ROC) = 3.8 mm), 200-micron, 20-micron, and razor blade (ROC ~2 micron). Additionally, transverse loading experiments were also conducted for a 0.30 cal. fragment simulating projectile (FSP) and compared to other indenters. Experimental results show that for the round, 200-micron indenter, and FSP geometry the yarn fails in tension with no degradation in axial failure strain compared to the uniaxial tensile failure strain of SK-76 yarn (2.58%). Whereas for the 20-micron indenter and razor blade, fibers fail progressively in transverse shear followed by progressive strength degradation of the yarn. Strength degradation of yarn occurs at relatively low strains of 0.6–0.7% with eventual failure of the yarn at approximately ~1.8% and ~1.5% strain for the 20-micron indenter and razor blade, respectively. Breaking angles (range of 10°–30°) are observed to have little effect on the failure strain for all indenter geometries.

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Section: Transverse Loading-the Effect Of Angle and Indenter Geometrysupporting

confidence: 64%

Experimental Investigation of Transverse Loading Behavior of Ultra-High Molecular Weight Polyethylene Yarns

Shah

Sockalingam

2020

Fibers

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“…In July 4, 1997, Mars Pathfinder made its notable landing on the surface of Mars, using airbags of Vectran fiber. Because of having high strength and light weight, the vectran fiber has to be used for aerospace application [39]. In addition to strong mechanical performance, negligible off-and out-gassing features of the Vectran fiber are required for high vacuum and space applications [7].…”

Section: Aerospacementioning

confidence: 99%

“…e fabric from Vectran is characterized by its tear strength, dimensional stability to preserve complex shapes, flex or fold fatigue resistance for frequent placements, pack and unpack rounds, and chemical resistance to survive washing processes [39]. e tensile strength, abrasion, and cut resistance of Vectran fibres advance its uses like protective textiles than traditional fibres and make a protective glove material [40][41][42].…”

Section: Fabric and Protective Materialsmentioning

confidence: 99%

“…Medical. Vectran fiber tensile properties make it an excellent choice for catheter reinforcement applications, device delivery systems, and surgical control cables [39]. e gamma sterilization, low or no creep, abrasion resistance, and dimensional stability of this high-performance fiber can also facilitate a more consistent user feel in many medical device applications where tactile feedback is critical [7].…”

Section: Fabric and Protective Materialsmentioning

confidence: 99%

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Article Review on Vectran-Super Fiber from Thermotropic Crystals of Rigid-Rod Polymer

Limeneh

Yilma

2021

Journal of Engineering

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According to the economic and environmental perspective, multifilament Vectran, yarn spun from liquid crystal polymer, is important because of its quite simple processing during spinning in a wide range of injection moulding, extrusion moulding, and melt spinning. Vectran fiber is an aromatic polyester spun from a liquid crystal polymer in a melt extrusion process. This process orients the molecules along the fiber axis, resulting in a high tenacity fiber, and Vectran melts at 330°C. Heat treatment can improve and vary the tensile strength of Vectran fiber. On average, tensile strength for Vectran is 26 grams/denier (grouped as a high tenacity grade) and the strength of the fiber is maintained after several flexing and bending actions. Abrasion resistance of Vectran is even higher than a similarly sized aramid yarn. In addition, the original dimensions are maintained under variance of temperature with negligible creep and shrinkage. Vectran fiber, characterized by its golden color, high strength and modulus, thermal stability at high temperatures, low creep, and good chemical stability, can be used in many various industries starting from ropes and cables to profound sea survey and military products.

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“…The pre-twist experimental results demonstrated a steep decrease in tensile strength as 10% shear strain or above is applied, which implies a combined tensile and shear fiber fracture morphology. Gao et al 10 studied the deformation and failure of single fibers that were transversely cut at high loading rate. It was found that the high performance in tension of a single fiber was extremely poorly developed when the fiber was transversely cut, indicating a shear-dominant failure mode.…”

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confidence: 99%

A filament-level analysis on failure mechanism and ballistic limit of real-size multi-layer 2D woven fabrics under FSP impact

Dippolito

Miao

et al. 2021

Textile Research Journal

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This paper investigates the failure mechanism and fabric ballistic performance of real-size multi-layer 2D woven fabrics impacted by sharp-edge fragment simulating projectile (FSP). First, the relations between digital fiber shear force and bending rigidity are established under the modified digital element approach (DEA) framework. Then, a systematic parametric study was carried out on the ballistic impact of a 4-inch-long single yarn and 4-inch by 4-inch 2D woven fabric at near fiber level to solve for the relations of digital fiber moment of inertia and ballistic limit. The results show that for the same number of digital fibers per yarn model, the simulated ballistic limits are in direct proportion to digital fiber moment of inertia. The increase of the number of digital fibers per yarn, however, decreases the digital fiber moment of inertia effect on ballistic limits. Second, the 1- to 28-layer real-size 2D woven Kevlar KM2 fabrics are simulated at filament level against FSP on the cluster to estimate the V50 zone. The perforation process and failure mechanism of 4-layer fabric is investigated and analyzed in detail. The simulation results demonstrate the deformed fabric shape with respect to time and the damage modes at the impact area. Numerical results are compared with standard ballistic test results.

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Failure behaviors of single high-performance fibers under transverse dynamic cut

Cited by 13 publications

References 38 publications

Experimental Investigation of Transverse Loading Behavior of Ultra-High Molecular Weight Polyethylene Yarns

Experimental Investigation of Transverse Loading Behavior of Ultra-High Molecular Weight Polyethylene Yarns

Article Review on Vectran-Super Fiber from Thermotropic Crystals of Rigid-Rod Polymer

A filament-level analysis on failure mechanism and ballistic limit of real-size multi-layer 2D woven fabrics under FSP impact

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