Advances in Composite Manufacturing of Helicopter Parts

Weber, Tobias A.; Ruff-Stahl, Hans-Joachim

doi:10.15394/ijaaa.2017.1153

Cited by 4 publications

(2 citation statements)

References 10 publications

(31 reference statements)

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“…It can be seen that the mold plays an important role which determines the shape of the component and affects the forming quality directly during the manufacturing process. [11][12][13] Producing components that meet the requirements is the ultimate goal of composite manufacturing. To improve the manufacturing quality of the composite component, research studies have been performed on adjusting the parameters of the autoclave curing process.…”

Section: Introductionmentioning

confidence: 99%

A manta-ray-inspired bionic curing mold for autoclave process of composite manufacturing

Lin

Wang

et al. 2022

Journal of Reinforced Plastics and Composites

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The temperature distribution of the mold is directly linked to the manufacturing quality of the composite component. In this paper, a bionic mold based on the analysis of a manta ray in swimming is developed to improve the thermal performance of the mold during the autoclave curing process. The bionic mold has fewer frames and better air permeability, and the mold weight is decreased by 42.95% while the stiffness is proved to satisfy the requirement. The model of the autoclave curing process which is verified by experiments is established to carry out the thermal analysis of the mold. Results show that the air velocity in the mold is increased with the bionic design, which can reduce not only the maximum temperature difference of the mold plate (−30.35%) but also the percentage of low-temperature areas. Besides, the heating rate and the heat preservation time of the mold are also improved.

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Section: Introductionmentioning

confidence: 99%

A manta-ray-inspired bionic curing mold for autoclave process of composite manufacturing

Lin

Wang

et al. 2022

Journal of Reinforced Plastics and Composites

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“…7 Hudek 13 is one of few researchers who work on tooling optimization to facilitate better autoclave flow and thereby a better heat transfer. Weber and Ruff-Stahl 14 show a summary of possible tooling improvements without providing details about the method of optimization. These are only a few examples of the work already performed, but they are representative concerning the general orientation of research activities.…”

Section: Introductionmentioning

confidence: 99%

Thermal optimization of composite autoclave molds using the shift factor approach for boundary condition estimation

Weber

Arent

Steffens

et al. 2017

Journal of Composite Materials

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Thermal optimization of autoclave molds is essential to increase part quality, reduce manufacturing costs and increase autoclave capacity. Previous experience-based tooling designs allowed an optimization only after the mold was manufactured and tested. Manufacturing process simulation provides the capability for virtual tooling optimization within the design phase. Thereby, the range of possible optimizations increases and the tooling cost decreases. In order to use manufacturing process simulation efficiently, fast but accurate simulation methods must be available. The so-called shift factor approach was previously presented by the authors. This paper takes up the given approach and explains different influences on mold heat-up and how they can be covered in a thermal tooling simulation on an industrial scale. Proof of the simulation accuracy under realistic manufacturing conditions is provided together with an example of its application.

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Electrically and Thermally Conductive Carbon Fibre Fabric Reinforced Polymer Composites Based on Nanocarbons and an In-situ Polymerizable Cyclic Oligoester

Jang

Park

Lee

et al. 2018

Sci Rep

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There is growing interest in carbon fibre fabric reinforced polymer (CFRP) composites based on a thermoplastic matrix, which is easy to rapidly produce, repair or recycle. To expand the applications of thermoplastic CFRP composites, we propose a process for fabricating conductive CFRP composites with improved electrical and thermal conductivities using an in-situ polymerizable and thermoplastic cyclic butylene terephthalate oligomer matrix, which can induce good impregnation of carbon fibres and a high dispersion of nanocarbon fillers. Under optimal processing conditions, the surface resistivity below the order of 10+10 Ω/sq, which can enable electrostatic powder painting application for automotive outer panels, can be induced with a low nanofiller content of 1 wt%. Furthermore, CFRP composites containing 20 wt% graphene nanoplatelets (GNPs) were found to exhibit an excellent thermal conductivity of 13.7 W/m·K. Incorporating multi-walled carbon nanotubes into CFRP composites is more advantageous for improving electrical conductivity, whereas incorporating GNPs is more beneficial for enhancing thermal conductivity. It is possible to fabricate the developed thermoplastic CFRP composites within 2 min. The proposed composites have sufficient potential for use in automotive outer panels, engine blocks and other mechanical components that require conductive characteristics.

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Advances in Composite Manufacturing of Helicopter Parts

Cited by 4 publications

References 10 publications

A manta-ray-inspired bionic curing mold for autoclave process of composite manufacturing

A manta-ray-inspired bionic curing mold for autoclave process of composite manufacturing

Thermal optimization of composite autoclave molds using the shift factor approach for boundary condition estimation

Electrically and Thermally Conductive Carbon Fibre Fabric Reinforced Polymer Composites Based on Nanocarbons and an In-situ Polymerizable Cyclic Oligoester

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