Simulation of bleeder flow and curing of thick composites with pressure and temperature dependent properties

Ganapathi, A.S.; Joshi, Sunil C.; Chen, Zhong

doi:10.1016/j.simpat.2012.12.002

Cited by 10 publications

(4 citation statements)

References 27 publications

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“…• precise temperature history prediction [23][24][25], which prevents the resin system from turning into a gel before the mould is filled (or the resin system curing too quickly in the composite [26][27][28]); • prediction and measurement of flow patency to determine with reasonable accuracy the temperature and velocity of the resin system in the mould [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Curing Process on the Fatigue Strength and Residual Strength of a Fiber Composite Estimation Using the Theory of Markov Chains

Chatys¹,

Kłonica²

2023

Adv. Sci. Technol. Res. J.

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The paper deals with the influence of quality failure of matrix post-curing on the strength of such complex and difficult "new generation" materials as fiber composites, especially those with polymer matrix. The performed statistical analysis of the components determined the complexity of the layered composite structure. And the developed model of the weakest micro-volume presented in this paper has helped to describe not only the predictable strength of the laminate, but also the nature of failure, taking into account the fiber stresses and/or the distribution of end strains in the structure of the composite under consideration. The strength of fibre composite structures based on Markov chain theory takes into account technological aspects during the curing process. The presented model was verified on the basis of literature examples and experimental data obtained during the testing process. Numerical results show good agreement with literature examples and measured data. The presented model may represent a novel method that provides further insight into the curing process of epoxy resins.

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Section: Introductionmentioning

confidence: 99%

Influence of the Curing Process on the Fatigue Strength and Residual Strength of a Fiber Composite Estimation Using the Theory of Markov Chains

Chatys¹,

Kłonica²

2023

Adv. Sci. Technol. Res. J.

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“…Up until now, the method of FEA has been extensively adopted for composites in the curing process [4,5,6,7,8,9,10,11,12], and diverse models have been developed to forecast the stress and deformation that arises from uneven degree of cure (DOC) and temperature [13,14,15,16,17,18,19,20]. Numerical models based on finite element methods (FEM) have been used to research the mechanisms generating residual stresses [4].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Curing Residual Stress and Deformation in Thermosetting Composite Laminates with Comparison between Different Constitutive Models

Dai

2019

Materials

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A multi-physics coupling numerical model of the curing process is proposed for the thermosetting resin composites in this paper, and the modified “cure hardening instantaneously linear elastic (CHILE)” model and viscoelastic model are adopted to forecast residual stress and deformation during the curing process. The thermophysical properties of both models are evolved in line with temperature and degree of cure (DOC). Accordingly, the numerical simulation results are improved to be more accurate. Additionally, the elastic modulus of the materials is calibrated to be equal to the modulus of viscoelastic relaxation by a defined function of time in the CHILE model. Subsequently, this work effectuates the two proposed models in a three-dimensional composite laminate structure. Through comparing the two numerical outcomes, it is customary that the residual stress and deformation acquired by the modified model of CHILE conform to those ones assessed through adopting the viscoelastic model.

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“…9,10 Such models correlate temperature with the curing degree and have frequently been implemented as off-line curing simulation tools. 11,12 The current study investigates the prospect of monitoring curing in-line via the typical temperature sensors (thermocouples or TCs and infrared thermography or IRT) through establishing a reliable correlation between temperature and curing degree. The motivation behind this work is that temperature monitoring comes with certain advantages over other cure monitoring methods.…”

Section: Introductionmentioning

confidence: 99%

“…9,10 Such models correlate temperature with the curing degree and have frequently been implemented as off-line curing simulation tools. 11,12…”

Section: Introductionmentioning

confidence: 99%

Exploiting temperature measurements for cure monitoring of FRP composites—Applications with thermocouples and infrared thermography

Konstantopoulos

Tonejc

Maĭer

et al. 2015

Journal of Reinforced Plastics and Composites

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The curing behavior of a fiber-reinforced polymer composite part is interesting for both the industrial and scientific community, for it is related to process optimization, quality upgrade, and material characterization. The study at hand focuses on the potential of temperature measurements as a means to monitor curing; kinetic analysis which conventionally is being done for small neat resin samples in a thermally stable environment (laboratory instruments), is in this study implemented for actual scale composite samples in an environment with significant thermal gradients (manufacturing). To ensure the success of this transition, live temperature data and kinetic parameters derived from DSC of composite samples were used as input to the kinetic equations. Process monitoring with thermocouples that was compared with dielectric constant monitoring and conventional kinetic analysis confirmed the validity of the method. An application with infrared thermography determined the impact of heat insulators within the composite (e.g. delaminations) on the superficial curing degree.

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Simulation of bleeder flow and curing of thick composites with pressure and temperature dependent properties

Cited by 10 publications

References 27 publications

Influence of the Curing Process on the Fatigue Strength and Residual Strength of a Fiber Composite Estimation Using the Theory of Markov Chains

Influence of the Curing Process on the Fatigue Strength and Residual Strength of a Fiber Composite Estimation Using the Theory of Markov Chains

Numerical Analysis of Curing Residual Stress and Deformation in Thermosetting Composite Laminates with Comparison between Different Constitutive Models

Exploiting temperature measurements for cure monitoring of FRP composites—Applications with thermocouples and infrared thermography

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