Mechanical behavior of nylon 66 tyre cord under monotonic and cyclic extension: Experiments and constitutive modeling

Li, Xuebing; Wei, Yintao; Feng, Qizhang; Luo, Robert Keqi

doi:10.1007/s12221-017-6961-x

Cited by 19 publications

(16 citation statements)

References 24 publications

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“…Soft fiber‐reinforced polymers (FRPs), consisting of soft, rubbery matrices, and rigid fabrics, featuring high strength, high contact compliance, low weight and low flexural stiffness, are uniquely qualified for wide use such as in tires, conveyor belts, soft robotics, etc. [ 1–3 ] However, a common problem of soft FRPs made from conventional rubbery matrices is their relatively low crack resistance, [ 4,5 ] which consequently results in increased risk of disastrous failure during their lifespan.…”

Section: Figurementioning

confidence: 99%

“…T k w w w = ⋅ ≥ (2b) The proportional constant k has a unit of energy dissipation density (J m −3 ). Equation (2) states that the tearing energy, T, is balanced by the release of stored strain energy in the crack tip zone of length w for samples with width w < w 2 or w 2 for samples with width w ≥ w 2 . The saturated T at w ≥ w 2 gives the intrinsic, size-independent tearing energy, Г, of the composites.…”

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confidence: 99%

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Fiber‐Reinforced Viscoelastomers Show Extraordinary Crack Resistance That Exceeds Metals

et al. 2020

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Soft fiber‐reinforced polymers (FRPs), consisting of rubbery matrices and rigid fabrics, are widely utilized in industry because they possess high specific strength in tension while allowing flexural deformation under bending or twisting. Nevertheless, existing soft FRPs are relatively weak against crack propagation due to interfacial delamination, which substantially increases their risk of failure during use. In this work, a class of soft FRPs that possess high specific strength while simultaneously showing extraordinary crack resistance are developed. The strategy is to synthesize tough viscoelastic matrices from acrylate monomers in the presence of woven fabrics, which generates soft composites with a strong interface and interlocking structure. Such composites exhibit fracture energy, Γ, of up to 2500 kJ m−2, exceeding the toughest existing materials. Experimental elucidation shows that the fracture energy obeys a simple relation, Γ = W · lT, where W is the volume‐weighted average of work of extension at fracture of the two components and lT is the force transfer length that scales with the square root of fiber/matrix modulus ratio. Superior Γ is achieved through a combination of extraordinarily large lT (10–100 mm), resulting from the extremely high fiber/matrix modulus ratios (104–105), and the maximized energy dissipation density, W. The elucidated quantitative relationship provides guidance toward the design of extremely tough soft composites.

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Section: Figurementioning

confidence: 99%

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confidence: 99%

Fiber‐Reinforced Viscoelastomers Show Extraordinary Crack Resistance That Exceeds Metals

et al. 2020

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“…This process was irreversible under unloading because of the friction. 19 With a few loading–unloading cycles, the hysteresis loop tended to be stable, while the 100th cycle was used to characterize hysteresis loss. 8,19 Results of this experiment in Figure 7 showed hysteresis loss of nylon 6 cord > nylon 66 cord > nylon-like polyester cord > standard polyester cord, which could be explained by the modulus of each specimen.…”

Section: Resultsmentioning

confidence: 99%

Study on dynamic mechanical properties of a nylon-like polyester tire cord

Tian

Wang

Wei

2019

Journal of Engineered Fibers and Fabrics

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Tires might be the first technically significant composite out of rubber and play a vital role in the overall performance of a car. The essential functions of a tire rely to a great extent on the properties of tire cords. Polyester and nylon cords make up the majority of synthetic fibers used in tires. A new kind of polyester cord has been developed combining the performance characteristics of both polyester and nylon cords. This article examines the dynamic mechanical properties of this nylon-like polyester tire cord by adopting dynamic mechanical analysis, Instron, and DISC fatigue experiments, as well as its dynamic adhesion property using flex fatigue experiment. It demonstrated that the dynamic complex modulus of the nylon-like polyester cord was higher than that of nylon 6 cord but lower than that of standard polyester cord, which was a favorable characteristic when it came to replacing nylon 6 cord with nylon-like polyester cord in tires. Under cyclic loading, hysteresis loss of nylon 6 cord > nylon 66 cord > nylon-like polyester cord > standard polyester cord was observed. In the DISC experiment, nylon-like polyester had a similar compression resistance property to that of nylon 6 cord. At a temperature below 85°C, nylon-like polyester cord maintained roughly the same level of residual ratio of dynamic adhesion, but beyond this temperature point, nylon 6 exhibited a better performance.

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“…However, it is associated with low-pressurebearing and poor sealing performance. It is, therefore, important to analyze and optimize the structural parameters of the nylon cord rubber in expandable packer to meet the on-site requirements of high-pressure and fine fracturing in low-permeability oil and gas reservoirs (Li et al 2017;Tian et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization and experiment of nylon cord rubber in expandable packer

et al. 2021

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Nylon cord rubber has the advantages of small residual deformation and is easy to lift and lower the tubing string in low-permeability oil and gas reservoirs. However, it is associated with low-pressure resistance and poor sealing performance. To enhance the performance of nylon cord rubber, a three-dimensional numerical model of the nylon cord rubber was established and its accuracy experimentally determined. The Plackett–Burman test, the Steepest climbing test and the Response surface method were used to acquire the polynomial response surface model connecting structural parameters with bearing and sealing pressure. Using genetic algorithms, optimal structural parameters of nylon cord rubber were determined depending on field operation. The reliability of the optimized results was verified by laboratory tests. It was shown that after optimization, the bearing capacity of the expandable packer increased by 25% while the sealing performance increased by 66%. In addition, the bearing pressure was 70 MPa while the sealing pressure was 50 MPa. These measurements effectively met the on-site requirements of high-pressure and fine fracturing in low-permeability oil and gas reservoirs.

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Mechanical behavior of nylon 66 tyre cord under monotonic and cyclic extension: Experiments and constitutive modeling

Cited by 19 publications

References 24 publications

Fiber‐Reinforced Viscoelastomers Show Extraordinary Crack Resistance That Exceeds Metals

Fiber‐Reinforced Viscoelastomers Show Extraordinary Crack Resistance That Exceeds Metals

Study on dynamic mechanical properties of a nylon-like polyester tire cord

Multi-objective optimization and experiment of nylon cord rubber in expandable packer

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