Investigation on vulcanization degree and residual stress on fabric rubber composites

Gong, Linghui; Yang, Heng; Ke, Yuchao; Wang, Shen

doi:10.1016/j.compstruct.2018.10.089

Cited by 21 publications

(7 citation statements)

References 26 publications

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“…Once one reaction mechanism is not sufficient enough to accurately expatiate the curing behavior, a piecewise fitting approach should be provided 16,18,19 . Moreover, the improved kinetic models for specific materials are developed, such as the introduction of the total ultimate conversion in the predicted curing reactions of the styrene‐based thermosets and thick composites manufactured by resin transfer molding 25,26 and the initial reaction stage considered in the modified equation based on Kamal–Sourour kinetic model developed for the simulation of the rubber curing process 27–29 …”

Section: Introductionmentioning

confidence: 99%

“…16,18,19 Moreover, the improved kinetic models for specific materials are developed, such as the introduction of the total ultimate conversion in the predicted curing reactions of the styrene-based thermosets and thick composites manufactured by resin transfer molding 25,26 and the initial reaction stage considered in the modified equation based on Kamal-Sourour kinetic model developed for the simulation of the rubber curing process. [27][28][29] There are indeed quite a few works related to the simulation of curing kinetics including calculations of kinetic parameters and establishments of fitting models. It is well known that the evaluation of cuing kinetic parameters depends on the curing degree, the initial value of which is generally 0.1 3,[13][14][15]18,19,[29][30][31][32] or 0.2 33,34 or minimum value increment.…”

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confidence: 99%

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Reliability evaluation of a new method developed for DSC curing kinetic model of epoxy resin

Jia

Zhu

Yan

et al. 2023

J of Applied Polymer Sci

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The curing kinetic model of epoxy resin is crucial for understanding reaction mechanism and accurately describing curing behavior of fiber reinforced polymer composites. In the investigations related to kinetic models of epoxy, much attention is payed to the curing characterizations of modified or mixed materials for the desired field of application in the case that the initial curing degree for calculating kinetic parameters is generally constant. In this paper, a new method by specifying the initial curing degree for kinetic parameters is developed to improve the accuracy of fitting models based on the resin systems and methods for activation energy. The curing kinetics of resin systems including Epoxy 4330, Epoxy 5212, and diglycidyl ether pentaerythritol vanillin diacetalbisphenol-A epoxy resin-4,4 0 -diaminodiphenyl sulfone (DEPVD-E51-DDS) are examined utilizing differential scanning calorimetric technique at five different heating rates. Additionally, Kissinger, Starink, and Friedman methods, and piecewise models are adopted to fit the experimental data. The predictions from fitting models using different initial curing degrees are subsequently compared with experimental data. It is concluded that the utilization of initial curing degree promotes the accuracy of fitting models.activation energy, curing kinetics, epoxy resin, fitting model | INTRODUCTIONEpoxy resin can be applied separately and also be taken as the matrix of fiber reinforced polymer (FRP) composites or particles reinforced epoxy hybrid composites 1 due to the superior properties such as easy processing, high chemical, and good adhesive properties, 2,3 which can be fabricated by various composite manufacturing

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Reliability evaluation of a new method developed for DSC curing kinetic model of epoxy resin

Jia

Zhu

Yan

et al. 2023

J of Applied Polymer Sci

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“…Nevertheless, there are disadvantages because the FDM faces difficulties when modeling complex geometries [ 21 ]. The FEM enables the vulcanization optimization of rubber products under complex conditions and, hence, it is extensively used to solve heat transfer equations [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. With advanced vulcanization simulation, specific values of various reaction parameters and crosslinking structures can be determined at any time for any point in the vulcanization field, enabling effective vulcanization prediction.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for Simulation and Optimization of Rubber Vulcanization

et al. 2023

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The kinetic model, encompassing the curing and reversion phenomena of the NR/SBR rubber vulcanization process, was developed by means of the finite element method simultaneously with heat transfer equations, including heat generation due to curing reactions. The vulcanization simulation was conducted for three spheres of different diameters (1, 5 and 10 cm) and two rubber wheels, one of which was a commercial product of the rubber industry. The proposed advanced simulation model, based on products’ two-dimensional axisymmetry, includes cooling after vulcanization, during which the crosslinking reactions continue to take place as a result of the products’ heated interiors. As a criterion for removing the product from the mold, an average vulcanization degree of 0.9 was set, whereby, during cooling, the vulcanization degree increases, due to crosslinking reactions. Based on the minimal difference between the maximal and minimal vulcanization degrees, which did not exceed a value of 0.0142, the optimal process parameters for each product were determined, achieving homogeneity and obtaining high-quality rubber products, while simultaneously ensuring a more efficient vulcanization process and enhanced cost effectiveness for the rubber industry.

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“…To sum up, the rubber ring sealing performance has been researched almost always by obtaining the equivalent stress and contact pressure of the rings through experimentation or finite element analysis [5][6][7][8][9][10][11][12][13]. Given the complex nonlinear contact between the rubber rings and the pipe spigots/ sockets during installation, plus the material nonlinearity of rubber materials, the research on the joint sealing design for long-distance large-sectional rock pipe jacking construction is immature.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Sealing Performance for a New Type of Rubber Olecranon‐Shaped Sealing Ring in Pipe Jacking Joint

Zhang

Chen

et al. 2022

Advances in Civil Engineering

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To address the easy damage of rubber sealing rings for pipe joints used in China’s first rock pipe jacking project, the launch of research concerning the optimization design of rubber ring structure was decided. However, modification based on the existing production mold was required, to prevent the construction period and cost from exceeding limits. Utilizing the optimization experience, the stress and waterproof property variations of rubber ring before and after optimization during the pipe translation and deflection were initially analyzed via the ADINA software. Meanwhile, the correct orientation of the ring optimization criteria was confirmed through the field test. Next, the effects of key structural parameters on the contact length and maximum contact pressure of rubber ring were quantified, thereby obtaining the sensitivity correlations between five key parameters of ring optimization to further establish the criteria for rubber ring optimization. The findings of this study offer safe construction suggestions for pipe jacking projects.

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Investigation on vulcanization degree and residual stress on fabric rubber composites

Cited by 21 publications

References 26 publications

Reliability evaluation of a new method developed for DSC curing kinetic model of epoxy resin

Reliability evaluation of a new method developed for DSC curing kinetic model of epoxy resin

A Novel Approach for Simulation and Optimization of Rubber Vulcanization

Analysis on Sealing Performance for a New Type of Rubber Olecranon‐Shaped Sealing Ring in Pipe Jacking Joint

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