Prediction of shape distortions. Part II. Experimental validation and analysis of boundary conditions

Svanberg, Jonas; Holmberg, J. Anders

doi:10.1016/j.compositesa.2004.02.006

Cited by 89 publications

(65 citation statements)

References 16 publications

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“…The number of the coefficient of linear thermal expansion in rubbery state is approximately 2.5 times larger than that in glassy state [17]:…”

Section: Stress-strain Relationshipmentioning

confidence: 98%

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Integrated analysis on cure–microstructure–property–deformation correlation of carbon fiber reinforced resin composites

Wang

Jia

et al. 2015

Computational Materials Science

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“…The number of the coefficient of linear thermal expansion in rubbery state is approximately 2.5 times larger than that in glassy state [17]:…”

Section: Stress-strain Relationshipmentioning

confidence: 98%

“…The glassy state properties can be calculated based on the assumptions: the shear modulus in glassy state, G g m , is approximately 100 times that in the rubbery state, G r m [17]:…”

Section: Relation Between Materials Modulus and Segment Weightmentioning

confidence: 99%

Integrated analysis on cure–microstructure–property–deformation correlation of carbon fiber reinforced resin composites

Wang

Jia

et al. 2015

Computational Materials Science

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“…Aluminium or steel tools have a much higher expansion coefficients than composite parts, and tend to stretch the parts as they heat up. This can happen as a result of small shear stresses at the tool interface causing tension in the part [2,3,[9][10][11][12][13][14][15][16][17]. The AGP (After Gel Point) plays a significant role on the magnitude of process-induced residual stresses, as demonstrate in the works [15][16][17].…”

mentioning

confidence: 99%

A Method for Cure Process Design of Thick Composite Components Manufactured by Closed Die Technology

Sorrentino

Tersigni

2010

Appl Compos Mater

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During the manufacture of polymer-matrix composite components the cure degree must be uniform to have a good quality of the product. For thick composite components this condition is not often respected in fact the cure degree trend between the core and the external surface is different causing structural and geometrical/dimensional unconformities. In most cases, these problems are caused by a wrong design of cure process in terms of thermal cycle and tooling, therefore the cure cycle must be designed and optimized. The optimization of cure thermal cycle should include several performance criteria for the production system such as the targeted cure degree, the targeted maximum temperature of the part and the duration of the cure cycle as well as the production system limitations such as the maximum allowable heating rate, the maximum allowable cooling rate etc. This work aims to define by thermochemical phenomena a first step toward the definition of a method to optimize the cure degree of a thick composite components by focusing particular attention to the aspects of thermal degradations and residual stress.

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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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Prediction of shape distortions. Part II. Experimental validation and analysis of boundary conditions

Cited by 89 publications

References 16 publications

Integrated analysis on cure–microstructure–property–deformation correlation of carbon fiber reinforced resin composites

Integrated analysis on cure–microstructure–property–deformation correlation of carbon fiber reinforced resin composites

A Method for Cure Process Design of Thick Composite Components Manufactured by Closed Die Technology

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

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