A Plane Strain Model for Process-Induced Deformation of Laminated Composite Structures

Johnston, A. E.; Vaziri, Reza; Poursartip, Anoush

doi:10.1177/002199801772662514

Cited by 49 publications

(91 citation statements)

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“…Alternatively, the properties of the matrix resin are measured as a function of the degree of cure and temperature. Assuming the fiber properties to be constant, the properties of the composite are then estimated either using self-consistent field micromechanics theories or 3D laminate theory [6,12,[15][16][17]. Estimation of residual stresses and shape distortion effects in the composite part is obtained either by employing the composite laminate theory [5,6,15], finite element methods [5,11,14,16,17], or closed-form analytical solutions [18].…”

Section: Background: Simulation Of Residual Stresses At Part Levelmentioning

confidence: 99%

“…Cure process models provide a valuable tool to understand the effect of composite microstructure, part geometry, and processing parameters on the development of residual stresses; such models also provide a relatively inexpensive virtual means of optimizing cure processing to minimize the residual stresses. Process models for composite cure are available that address residual stress development at the part level [6,[8][9][10][11][12][13][14][15][16][17][18] or at the "meso" levels involving the microstructure or fiber-matrix interface [19][20][21][22][23]. However, a systematic framework for bridging the information at the two scales has not been demonstrated; such bridging of information is critical for obtaining realistic estimates of residual stresses at the fiber matrix interface and for arriving at an understanding of the efficacy of reinforcement.…”

Section: Introductionmentioning

confidence: 99%

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Multiscale Modeling of Residual Stress Development in Continuous Fiber-Reinforced Unidirectional Thick Thermoset Composites

Patham

Huang

2014

Journal of Composites

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The primary objective of this research is to develop a multiscale simulation framework to arrive at more realistic estimates of cureinduced residual stresses in the vicinity of the fiber-matrix interface in thick thermoset composites. The methodology involves simulations at the part level-employing homogenized rendering of the composite using micromechanics approach-within a finite element framework to obtain part-level temperature and degree-of-cure gradients and strains, and imposition of this information as boundary conditions at the mesoscale simulations, employing microstructural representative volume elements (RVE). A simple implementation of the multiscale framework, involving simulations at the part as well as the RVE levels, is demonstrated in the context of a thick, unidirectional continuous-glass-fiber-reinforced thermoset composite. The trends in the mesoscale residual stresses estimated by employing different RVE-level thermal and thermomechanical boundary conditions-displaying different degrees of coupling between the global and part-level simulations-are then examined. Significant differences are observed in the estimates of mesolevel cure-induced residual stress evolution obtained from simulations with a conventional symmetric RVE and those obtained by employing the multiscale approach involving detailed boundary conditions that realistically account for global thermal and mechanical strain histories.

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Section: Background: Simulation Of Residual Stresses At Part Levelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiscale Modeling of Residual Stress Development in Continuous Fiber-Reinforced Unidirectional Thick Thermoset Composites

Patham

Huang

2014

Journal of Composites

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“…These factors are known to have significant effects on the final residual stresses in PMCs [3,4]. To capture the influence of these factors, a variety of revised cure-dependent elastic models have been proposed [4][5][6][7], such as a path dependent constitutive model [4,5] and the cure-hardening, instantaneous linear elastic (CHILE) model [7]. However, these models, do not consider stress relaxation during the cooling process.…”

Section: Introductionmentioning

confidence: 99%

Residual stresses created during curing of a polymer matrix composite using a viscoelastic model

Zhang

et al. 2016

Composites Science and Technology

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. limited ranges of the Deborah number. By considering the evolution of the Deborah number during curing of the AS4/3501-6 composite, the composite is in a fully relaxed state when it is cured at high temperature and the degree of cure is lower than 0.73, and no further changes in the viscoelastic characteristics when the degree of cure is higher than 0.8. A 3D simulation of a composite laminate plate is used to predict the evolution of the residual stresses. The analysis reveals that the accurate simulation on the cure-induced residual stress should include the last two states of the entire cure process, and consider the stress relaxation, thermal deformation and chemical shrinkage.

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“…Process induced deformations caused by autoclave manufacture of laminates have previously been modeled using finite element simulation. 15 The aim of this paper is to analyze the manufacturing benefit of a new laminate design strategy that has been developed. There are many factors that contribute to the manufacturability of laminates but the scope of the new design strategy is to consider elastic stiffness coupling and geometrical effects caused by tapering thickness.…”

Section: Introductionmentioning

confidence: 99%

Anti-symmetric laminates for improved consolidation and reduced warp of tapered C-sections

Fletcher

Butler

Dodwell

2015

Advanced Manufacturing: Polymer & Composites Science

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A Plane Strain Model for Process-Induced Deformation of Laminated Composite Structures

Cited by 49 publications

References 0 publications

Multiscale Modeling of Residual Stress Development in Continuous Fiber-Reinforced Unidirectional Thick Thermoset Composites

Multiscale Modeling of Residual Stress Development in Continuous Fiber-Reinforced Unidirectional Thick Thermoset Composites

Residual stresses created during curing of a polymer matrix composite using a viscoelastic model

Anti-symmetric laminates for improved consolidation and reduced warp of tapered C-sections

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