Mathematical representation of creep for high-temperature performance of nylon6.6 tire materials

Nkiwane, Londiwe C.; Mukhopadhyay, Samrat

doi:10.1002/(sici)1097-4628(19990620)72:12<1505::aid-app1>3.0.co;2-g

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…Nevertheless, there was no evidence of showing a creep rupture, thus emphasizing the test was done within the material’s linear viscoelastic region (LVR). For obtaining the creep rupture, the samples would be subjected to large stresses with a longer time, which might lead to structural failure beyond the LVR [34].…”

Section: Resultsmentioning

confidence: 99%

Dual cantilever creep and recovery behavior of sisal/hemp fibre reinforced hybrid biocomposites: Effects of layering sequence, accelerated weathering and temperature

Senthilkumar

Saravanasankar

Ungtrakul

et al. 2020

Journal of Industrial Textiles

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In this work, the influence of weathering on the creep behavior of the sisal (SSSS), hemp (HHHH), and their hybrid composites (HSSH, and HSHS) was investigated. Composites were exposed to accelerated weathering for 2222 h, which replicates conditions equivalent to 1 year of outdoor exposure. Bio-epoxy based composites were fabricated by the hot press technique. Creep study was performed in a dynamic mechanical analyzer under the dual cantilever creep mode at 30 °C and 50 °C testing temperature under a load of 5 N. The creep-recovery behavior of the weathered composite specimens was evaluated and compared with the unweathered specimens. The investigation revealed that creep strain decreased with the incorporation of the sisal and hemp fibres into the bio-epoxy matrix. The experimental creep response of the composites was also in good agreement with the analytical results from Burger’s model. Both the weathering and testing conditions at elevated temperature (50 °C) had a significant impact on the creep resistance of the composites. The creep resistance of the hybrid composites was found to be dependent on the layering sequence. HSHS configuration almost displayed similar creep properties before and after weathering. HSSH configuration was found to have lower creep resistance after weathering. Scanning electron microscopy was used out to examine the fibre-matrix interface of the composites.

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Section: Resultsmentioning

confidence: 99%

Dual cantilever creep and recovery behavior of sisal/hemp fibre reinforced hybrid biocomposites: Effects of layering sequence, accelerated weathering and temperature

Senthilkumar

Saravanasankar

Ungtrakul

et al. 2020

Journal of Industrial Textiles

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“…The fraction mechanism due to the fatigue required to study it under single type of cyclic loading. In recent years a comprehensive study of flex fatigue of various fibers was carried out [1][2][3][4][5][6]. The fatigue loading creates fatigue damage which in turn decreases the in-plane mechanical properties of the composite (strength and stiffness) and causes a delamination.…”

Section: Introductionmentioning

confidence: 99%

“…They suffer creep and fatigue. Creep and fatigue of textile materials are the source of many problems of ultimate performance of a tire [4].A fixed-point and double-face bending fatigue apparatus is introduced and used to investigate the bending fatigue properties of highperformance fibers [10]. Previous researchers characterized the flexing fatigue of textile materials through using different apparatus to provide the assessment standards for the flexing fatigue life of fibrous materials.…”

Section: Introductionmentioning

confidence: 99%

New Flex Fatigue Tester for Fiber Reinforced Polymer Composite

Messiry

Mohamed

2019

KEM

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Textile materials are widely used in the industrial textiles. The yarn and fabric fatigue are not easily prearranged hence, in most cases the apparatuses used for applying cyclic loading under flex fatigue conditions will affect only one section of the yarn and fabric and the results will depend on the level of heterogeneity of the tested material. The common methods of flex fatigue testing are to pull the tested specimen, hold under tension, backward and forward over a fixed roller or grip one end of the specimen while its free end is bent so, the specimen element is alternated between straight and bent form. The new suggested principle is the fixation of the yarns or fabrics in the internal part of rubber tire wheel and pressing it by the pressure of internal rubber tube with the external wheel under predetermined load to give the required bending deformation on the specimen. The theoretical calculation of the design indicates that the testing specimen is subjected to pure bending. In this work, a setup was built up and several types of the technical yarns, fabrics, as well as flexible composites, were tested.it was proves the degradations of the material under the flex fatigue. .

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“…In particular, creep is one of the most fundamental considerations of the long-term mechanical properties critical to product acceptance in many engineering applications. 6 Creep can lead to excessive deformations over a long period of time, which may cause rupture failures; therefore, its consideration is important in the design of polymer-based products.…”

Section: Introductionmentioning

confidence: 99%

The effect of temperature on creep behavior of wood-plastic composites

Chang

Lam

Kadla

2014

Journal of Reinforced Plastics and Composites

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The creep properties of wood-plastic composites limit their application, particularly in temperature variations affecting long-term performance. In this study, the effect of temperature was studied based on dynamic mechanical analysis spectra and isochrones and a newly developed stress-temperature incorporated creep equation. According to the dynamic mechanical analysis spectra, the addition of a higher content of wood flour resulted in higher moduli, indicating increased stiffness and lower mechanical loss factor. According to the isochrones, the creep strain of wood-plastic composites increased with elevated temperatures and stresses at the same time point. Moreover, the strain increased almost linearly with increasing stress at lower temperatures but became nonlinear with elevated temperature. With these findings, a stress-temperature incorporated creep equation was developed based on short-term creep tests. This empirical equation incorporates the effect of temperature in a power law equation. Good agreement was observed between the equation and experimental results.

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Mathematical representation of creep for high-temperature performance of nylon6.6 tire materials

Abstract: A creep model that describes the creep characteristics of nylon6.6 tire materials is proposed. An equation resulting from the model was used to fit the experimental curves by nonlinear regression. The results outline a good correlation between theoretical and experimental curves.

Cited by 8 publications

References 3 publications

Dual cantilever creep and recovery behavior of sisal/hemp fibre reinforced hybrid biocomposites: Effects of layering sequence, accelerated weathering and temperature

Dual cantilever creep and recovery behavior of sisal/hemp fibre reinforced hybrid biocomposites: Effects of layering sequence, accelerated weathering and temperature

New Flex Fatigue Tester for Fiber Reinforced Polymer Composite

The effect of temperature on creep behavior of wood-plastic composites

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