Dimension variation prediction for composites with finite element analysis and regression modeling

Dong, Chensong; Zhang, Chuck; Liang, Zhiyong; Wang, Ben

doi:10.1016/j.compositesa.2003.12.005

Cited by 25 publications

(13 citation statements)

References 18 publications

(32 reference statements)

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“…The experimental measurements showed the through-thickness cure shrinkage strains in cross-ply samples to be twice of the strains in unidirectional ones, which is similar to the findings in [ 15 ]. The concept of an equivalent CTE was used to account for resin shrinkage during the curing process [ 25 , 35 , 80 , 81 ]. The volumetric cure shrinkage of the resin was implemented by changing the CTE of the composite material in numerical models.…”

Section: Modelling the Governing Physicsmentioning

confidence: 99%

A Review on the Mechanical Modeling of Composite Manufacturing Processes

Baran

Çınar

Ersoy

et al. 2016

Arch Computat Methods Eng

253

168

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The increased usage of fiber reinforced polymer composites in load bearing applications requires a detailed understanding of the process induced residual stresses and their effect on the shape distortions. This is utmost necessary in order to have more reliable composite manufacturing since the residual stresses alter the internal stress level of the composite part during the service life and the residual shape distortions may lead to not meeting the desired geometrical tolerances. The occurrence of residual stresses during the manufacturing process inherently contains diverse interactions between the involved physical phenomena mainly related to material flow, heat transfer and polymerization or crystallization. Development of numerical process models is required for virtual design and optimization of the composite manufacturing process which avoids the expensive trial-and-error based approaches. The process models as well as applications focusing on the prediction of residual stresses and shape distortions taking place in composite manufacturing are discussed in this study. The applications on both thermoset and thermoplastic based composites are reviewed in detail.

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Section: Modelling the Governing Physicsmentioning

confidence: 99%

A Review on the Mechanical Modeling of Composite Manufacturing Processes

Baran

Çınar

Ersoy

et al. 2016

Arch Computat Methods Eng

253

168

View full text Add to dashboard Cite

show abstract

“…It is shown that the dominant contributions to the variation in the spring-in are the Poisson's ratio of the matrix and the transverse CTE of the fibres. From previous studies [18,19], the variation in the spring-in can be up to 50%. Since the Poisson's ratio of the matrix has a large range and is difficult to control, inherent variations exist in the spring-in.…”

Section: Sensitivity Analysismentioning

confidence: 82%

Sensitivity Analysis for the Spring-in of Composite Shells

Dong

2011

Advanced Composites Letters

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Composite materials are a class of engineering materials widely used in a wide range of industries. Spring-in is a common dimensional variation of composite shells. It is well known that spring-in is dependent on many factors e.g. the constituent properties and coefficients of thermal expansion (CTE). A sensitivity analysis on the spring-in is presented in this paper. The sensitivities of the spring-in to the constituent properties and CTE are studied by the Design of Experiments (DOE) and the Response Surface Method (RSM). It is shown that the spring-in is predominantly sensitive to the Poisson's ratio of the matrix and the transverse CTE of the fibres. The results can be used to estimate the uncertainty of the spring-in from the uncertainties of the constituent properties and CTE, which is potentially useful for the design of composite products with improved dimensional control.

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“…Here a systematic study is conducted to investigate the influence of resin shrinkage on curing deformation. Since a volumetric shrinkage of epoxy systems can reach 1-5% 12 , the resin volumetric shrinkages of 1.0, 2.0, 3.0, 4.0 and 5.0% are assumed in the simulations of the graphite/epoxy laminates (lay-up type is [0 5 /45 5 ]). An antithesis group (V sh is 0%) which represents not considering the resin curing shrinkage is introduced.…”

Section: Effect Of Resin-dominated Factors On Curing Deformationmentioning

confidence: 99%

Thermal Curing Induced Deformation of Fiber Composite Laminates

Wang

Jia

Wang

2012

Polymers and Polymer Composites

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The curing of fiber-reinforced composite laminates is a complex thermal-chemical-mechanical coupling process, during which composite laminates experience shape change because of resin thermal curing induced composite stress. For composite structures with high shape precision demands, the internal stress should be reduced or even avoided. According to the coupling method of multi-physical fields, the curing process and the process-induced deformation of composite laminates were simulated systematically in this work. The influencing factors are classified into two categories: matrix-dominated and fiber-dominated. The former category consists of curing shrinkage and reaction heat. Reaction heat influences the curing deformation through affecting the temperature and curing degree fields; however curing shrinkage has a direct impact on the strain. The latter one consists of ply orientation and fiber volume fraction, which influence the curing deformation by affecting the mechanical properties of the composite laminates. This study is helpful for understanding the relationship among the thermal, chemical, and mechanical behaviors.

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Dimension variation prediction for composites with finite element analysis and regression modeling

Cited by 25 publications

References 18 publications

A Review on the Mechanical Modeling of Composite Manufacturing Processes

A Review on the Mechanical Modeling of Composite Manufacturing Processes

Sensitivity Analysis for the Spring-in of Composite Shells

Thermal Curing Induced Deformation of Fiber Composite Laminates

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