Effect of processing method on the spring-in of aircraft ribs

He, Liang; Zhao, Ansha; Li, Yao; Zhou, Botao; Liang, Wenyan

doi:10.1016/j.coco.2021.100688

Cited by 6 publications

(5 citation statements)

References 30 publications

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“…e temperature of the composite material is determined by the internal temperature of the autoclave, the heat transfer performance of the mold, and the heat released by the curing reaction, which is equivalent to a nonlinear temperature transfer problem with an internal heat source. e expression of the heat transfer model used in this paper is as follows [8,20]:…”

Section: Analysis Of Temperature Field and Curing Deformationmentioning

confidence: 99%

“…First define the field variables of the initial curing degree and curing rate through USDFLD, then establish the timevarying model of specific heat and thermal conductivity in UMATHT [8]. e temperature boundary conditions and environmental convection of the finite element model are added to DISP and FILM.…”

Section: Curing Deformation Analysis Based On Finite Elementmentioning

confidence: 99%

“…For now, FEM on the forming process of composite materials has been vigorously researched, and some sophisticated constitutive models have been proposed. A typical FEM numerical simulation consists of the heat transfer-curing model and the stress-deformation model [8].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Prediction of the Temperature of Large Framed Mold and Curing Deformation of Composite Components in the Autoclave Process

Zhao

Yue

et al. 2022

Advances in Materials Science and Engineering

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The temperature uniformity and thermal deformation of the tool in the autoclave forming process have an important influence on the forming quality of the composite components. In this paper, the prediction methods of the temperature distribution of the tool and the curing deformation of composite components in the autoclave forming process were developed. Using Ansys CFX fluid analysis technology, the temperature field of a large framed tool in the autoclave process was simulated, and the distribution of the surface temperature of the large framed tool was obtained. The calculated temperature field was then applied in the cure-induced deformation simulation of composite components. The thermo-chemical-mechanical coupling analysis was conducted to simulate the curing deformation of the composite components, and the numerical results were verified by practical engineering application.

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Section: Analysis Of Temperature Field and Curing Deformationmentioning

confidence: 99%

Section: Curing Deformation Analysis Based On Finite Elementmentioning

confidence: 99%

See 1 more Smart Citation

Prediction of the Temperature of Large Framed Mold and Curing Deformation of Composite Components in the Autoclave Process

Zhao

Yue

et al. 2022

Advances in Materials Science and Engineering

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“…Common occurrences of slosh are within the fuel tanks of passenger vehicles [1], commercial aircraft [2][3][4], spacecraft [5,6] or in tanker vessels transporting liquefied natural gas [7,8]. The resulting slosh forces are an important consideration in the structural design of tanks as well as the dynamics and control of the vehicles carrying them [4,9].…”

Section: Introductionmentioning

confidence: 99%

Embedded One-Dimensional Orifice Elements for Slosh Load Calculations in Volume-Of-Fluid CFD

Botha

Malan

2022

Applied Sciences

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For CFD liquid sloshing simulations, fine computational mesh resolutions are typically required to model the flow within small flow passages or orifices found in fuel tanks. This work presents a method of replacing the fine computational mesh elements within orifices with large one-dimensional mesh elements that integrate seamlessly with standard finite volume computational elements with the intended advantage of reducing the overall computational cost of CFD simulations. These one-dimensional elements conserve mass and momentum for two-phase flow in incompressible Volume-Of-Fluid CFD. Instead of fully resolving the momentum diffusion term, empirical correlations are used to account for the viscous losses within the orifices for both two- and three-dimensional simulations. The one-dimensional orifice elements are developed and validated against analytical and experimental results using the finite volume CFD code Elemental®. Furthermore, these elements are tested in a violent sloshing simulation and compared with full-resolution numerical results as well as experimental results. The elements are shown to decrease computational cost significantly by reducing the number of computational elements as well as increasing the simulation time step sizes (due to an increase in element sizes).

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“…In recent years, carbon-fiber-reinforced thermoset polymer (CFRP) composite structures have been widely used in aeronautics [ 1 ] and aerospace [ 2 ], automotive [ 3 ], marine [ 4 ] and civil engineering [ 5 ] owing their high specific stiffness and strength. Autoclave solidification process is one of the most used methods to manufacture the CFRP composites, particularly the primary load-bearing structures in aircraft [ 6 , 7 , 8 , 9 ]. In an autoclave process, composites undergo a crosslinking reaction under the prescribed temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Optimization of Curing Profile for Autoclave Processed Composites: Simultaneous Control of Curing Time and Process-Induced Defects

Tang

Hui

et al. 2022

Polymers

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The contribution of this work is introducing a multi-objective optimization method based on finite element (FE) numerical simulation to simultaneously control the curing time and cure-induced defects of C-shaped composites during a curing cycle. Thermochemical and thermomechanical coupled analysis is performed and validated experimentally to understand the evolution details of temperature, degree of cure and curing deformation. Aiming to achieve the simultaneous control of manufacturing cost and composite quality, the curing profile is optimized by employing the critical factors including the total curing time, the maximum degree of cure difference, and the curing deformation. The optimization result shows that the designed curing profile can effectively reduce the curing time and guarantee the curing quality. The total curing time of the optimization is reduced by 19%. The verification experiment is also conducted to prove the accuracy and effectiveness of the proposed optimization method.

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Effect of processing method on the spring-in of aircraft ribs

Cited by 6 publications

References 30 publications

Prediction of the Temperature of Large Framed Mold and Curing Deformation of Composite Components in the Autoclave Process

Prediction of the Temperature of Large Framed Mold and Curing Deformation of Composite Components in the Autoclave Process

Embedded One-Dimensional Orifice Elements for Slosh Load Calculations in Volume-Of-Fluid CFD

Multi-Objective Optimization of Curing Profile for Autoclave Processed Composites: Simultaneous Control of Curing Time and Process-Induced Defects

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