Evolution of curing residual stresses in composite using multi-scale method

Yuan, Zhenyi; Wang, Yongjun; Yang, Gang; Tang, Aofei; Yang, Zhenchao; Li, Shujuan; Li, Yan; Song, Dong‐Ping

doi:10.1016/j.compositesb.2018.08.012

Cited by 83 publications

(31 citation statements)

References 53 publications

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“…Therefore, contact changes from stick behavior to slip behavior. Various approaches and aspects of cure modeling and process-induced strains are presented in [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Method for residual strain modeling taking into account mold and distribution of heat transfer coefficients for thermoset composite material parts

Kiauka

Kasatkin

Tcygantceva

et al. 2021

Int J Adv Manuf Technol

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The article presents a technique for process-induced residual strain modeling for thermoset composite material parts. The model takes into account the mechanical and thermal contact between the part and the mold. The technique is implemented in the ABAQUS software using user subroutines. Using the technique, it is possible to clarify the distribution of the heat transfer coefficient on the surface of the part and mold using the CFD method. Distribution of heat transfer coefficients are obtained in ANSYS CFX under the appropriate process conditions. The method is verified for the U-shaped sample. Also, the results of modeling the stringer-stiffened curved composite panel using the developed technique without taking into account the mold and heat transfer coefficient distribution are presented.

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“…Therefore, contact changes from stick behavior to slip behavior. Various approaches and aspects of cure modeling and process-induced strains are presented in [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Method for residual strain modeling taking into account mold and distribution of heat transfer coefficients for thermoset composite material parts

Kiauka

Kasatkin

Tcygantceva

et al. 2021

Int J Adv Manuf Technol

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“…Many papers have been published that focus on the rise of thermal distortion due to thermal gradients during consolidation [22]. As demonstrated by Yuan et al [23], internal stresses also occur during the heating and dwell stage and not only during the cooling down until room temperature stage. This phenomenon is related to matrix curing due to the exothermal reaction.…”

Section: Introductionmentioning

confidence: 99%

An Efficient Thermal Cure Profile for Thick Parts Made by Reactive Processing of Acrylic Thermoplastic Composites

Palmieri

Petriccione²,

Tommaso³

et al. 2021

J. Compos. Sci.

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The process of curing of large thick composite parts needs attention regarding the formation of residual stresses. Similarly, novel reactive thermoplastics need investigating to produce an efficient thermal cure profile that decreases the risk of warpage and residual stress. In this work, the polymerization kinetics of the Elium resin system is investigated by differential scanning calorimetry (DSC) tests, the analysis of thermo-grams, and the parameters of Kamal and Sourour’s semi-empirical model. A numerical model based on finite elements was set up to reproduce the temperature fields during part consolidation. Several processing conditions were investigated (dwell temperature, environment, heat exchange) in order to predict the thermal gradient within the part. The optimal cure profile was identified as a function of process parameters with the aim of minimizing the thermal gradient within the composite element. The analysis revealed that, for the reactive thermoplastic Elium, the consolidation in facilities with high thermal exchange may increase the risk of residual stresses within the parts, erasing the advantage of short cure cycles.

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“…These factors directly determine the amounts of thermal deformations and cure shrinkage of the resin, both of which cause residual stresses at both micro‐ and macro‐scales; see, for example, References 13,19,20,36 for the prediction of microscale residual stress developments in RVEs. Thus, the consideration of the thermo‐chemo‐mechanical coupling is indispensable to properly evaluate the micro‐ and macroscopic mechanical behavior of the final product in a manufacturing process as demonstrated by Ding et al 6 and Yuan et al 37 …”

Section: Introductionmentioning

confidence: 99%

“…These factors directly determine the amounts of thermal deformations and cure shrinkage of the resin, both of which cause residual stresses at both micro-and macro-scales; see, for example, References 13,19,20,36 for the prediction of microscale residual stress developments in RVEs. Thus, the consideration of the thermo-chemo-mechanical coupling is indispensable to properly evaluate the micro-and macroscopic mechanical behavior of the final product in a manufacturing process as demonstrated by Ding et al 6 and Yuan et al 37 In view of the above background, this article proposes a decoupled scheme for two-scale thermo-chemo-mechanical analysis of FRP exhibiting finite thermoviscoelasticity in consideration of the dependence of resin's mechanical and nonmechanical deformation characteristics on the DOC and ambient temperature. To characterize the macroscopic material behavior, a series of NMTs is carried out on a unit cell composed of an epoxy resin and carbon fibers in line with computational homogenization.…”

Section: Introductionmentioning

confidence: 99%

A decoupling scheme for two‐scale finite thermoviscoelasticity with thermal and cure‐induced deformations

Saito

Yamanaka

Matsubara

et al. 2020

Numerical Meth Engineering

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This article proposes a decoupling scheme for two-scale analysis of fiber-reinforced plastics (FRP) exhibiting finite thermoviscoelasticity in consideration of the dependences of resin's mechanical and nonmechanical deformation characteristics on the degree of cure (DOC) and ambient temperature. To characterize the macroscopic material behavior, numerical material tests are carried out on a unit cell composed of a polymer resin matrix and carbon fibers. The generalized Maxwell model (GMM) is employed for resin' material behavior, while its orthotropic version is assumed for FRP. The evolution of DOC is reflected in the evaluation of the nonmechanical deformation by cure shrinkage in addition to thermal expansion/contraction. The key ingredient of this study is the novel strategy for identifying the macroscopic coefficients of these nonmechanical deformations, both of which must be separately defined in the equilibrium and nonequilibrium elements of the orthotropic GMM. In addition, a modification is originally made on the evolution equations of the nonequilibrium stresses in the GMM. The verification analyses are carried out to confirm the adequateness of the proposed identification methods and followed by numerical examples of two-scale analysis to demonstrate the capability of simulating the macro-and microscopic thermomechanical responses of FRP subjected to curing.

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Evolution of curing residual stresses in composite using multi-scale method

Cited by 83 publications

References 53 publications

Method for residual strain modeling taking into account mold and distribution of heat transfer coefficients for thermoset composite material parts

Method for residual strain modeling taking into account mold and distribution of heat transfer coefficients for thermoset composite material parts

An Efficient Thermal Cure Profile for Thick Parts Made by Reactive Processing of Acrylic Thermoplastic Composites

A decoupling scheme for two‐scale finite thermoviscoelasticity with thermal and cure‐induced deformations

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