Forced-interaction and spring-in – Relevant initiators of process-induced distortions in composite manufacturing

2016 ◽  
Vol 140 ◽  
pp. 217-229 ◽  
Author(s):  
Erik Kappel
Keyword(s):  
Composite Manufacturing ◽  
Forced Interaction

LDPE Building Blocks with Controlled Graphene-oxide Interfaces: Composite Manufacturing and Electric Property Investigation

2016 ◽  
Vol 136 (2) ◽  
pp. 93-98 ◽  
Author(s):  
Paolo Mancinelli ◽  
Valentina Santangelo ◽  
Davide Fabiani ◽  
Andrea Saccani ◽  
Maurizio Toselli ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Building Blocks ◽  
Electric Property ◽  
Oxide Interfaces ◽  
Composite Manufacturing

Investigation on the Influence of Pressure Terms in a Volume-Averaged Energy Balance in the Modelling of Liquid Composite Moulding Processes

2019 ◽  
Vol 809 ◽  
pp. 480-486
Author(s):  
Rohit George Sebastian ◽  
Christof Obertscheider ◽  
Ewald Fauster ◽  
Ralf Schledjewski
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Energy Balance ◽  
Matrix Material ◽  
Energy Balance Equation ◽  
Manufacturing Processes ◽  
Composite Manufacturing ◽  
Liquid Composite Moulding ◽  
The Matrix ◽  
Computational Fluid Dynamics Cfd

The growing use of composite materials has generated interest in improving and optimising composite manufacturing processes such as Liquid Composite Moulding (LCM). In LCM, dry preforms are placed in a mould and impregnated with the matrix material. The efficiency of filling the moulds can be improved by using Computational Fluid Dynamics (CFD) filling simulations during the design of the mould. As part of an on-going effort to develop a CFD tool for the simulation of LCM processes, a volume averaged energy balance equation has been derived and implemented in a custom OpenFOAM solver. The energy balance is implemented in a custom OpenFOAM solver with and without the pressure terms for comparison with results from RTM experiments. It is found that the pressure terms do not significantly influence the results for LCM processes.

scholarly journals Causes and remedies for porosity in composite manufacturing

2016 ◽  
Vol 139 ◽  
pp. 012002 ◽  
Author(s):  
G Fernlund ◽  
J Wells ◽  
L Fahrang ◽  
J Kay ◽  
A Poursartip
Keyword(s):  
Composite Manufacturing

Design and Analysis of Hybrid Fused Filament Fabrication Apparatus for Fabrication of Composites

2021 ◽  
Vol 14 ◽  
Author(s):  
Aniket Yadav ◽  
Piyush Chohan ◽  
Ranvijay Kumar ◽  
Jasgurpreet Singh Chohan ◽  
Raman Kumar
Keyword(s):  
Additive Manufacturing ◽  
Composite Materials ◽  
Design Process ◽  
Low Cost ◽  
Matrix Material ◽  
Fabrication Process ◽  
Layer By Layer ◽  
Fused Filament Fabrication ◽  
Composite Manufacturing ◽  
Tool Paths

Background: Additive manufacturing is the most famous technology which requires materials or composites to be fabricated with layer by layer deposition strategy. Due to its lower cost, higher accuracy and less material wastage; this technology is used in almost every sector. But in many applications there is a need to alter the properties of a product in a certain direction with the help of some reinforcements. With the use of reinforcements, composite layers can be fabricated using additive manufacturing technique which will enhance the directional properties. A novel apparatus is designed to spray the reinforcement material into the printed structures in a very neat and precise manner. This spray nozzle is fully automated, which works according to tool-paths generated by slicing software. The alternate deposition of layers of reinforcement and build materials helped to fabricate customized composite products. Objective: The objective of present study is to design and analyze the working principle of novel technique which has been developed to fabricate composite materials using additive manufacturing. The apparatus is numerically controlled by computer according to CAD data which facilitates the deposition of alternate layers of reinforcement and matrix material. The major challenges during the design process and function of each component has been explored. Methods: The design process is initiated after comprehensive literature review performed to study previous composite manufacturing processes. The recent patents published by different patent offices of the world are studied in detail and analysis has been used to design a low cost composite fabrication apparatus. A liquid dispensing device comprises a storage tank attached with a pump and microprocessor. The microprocessor receives the signal from the computer as per tool paths generated by slicing software which decides the spray of reinforcements on polymer layers. The spraying apparatus moves in coordination with the primary nozzle of the Fused Filament Fabrication process. Results: The hybridization of Fused Filament Fabrication [process with metal spray process has been successfully performed. The apparatus facilitates the fabrication of low cost composite materials along with flexibility of complete customization of composite manufacturing process. The anisotropic behaviour of products can be easily controlled and managed during fabrication which can be used for different applications.

Gas permeation and viscoelastic deformation of prepregs in composite manufacturing processes

1995 ◽  
Vol 16 (5) ◽  
pp. 370-377 ◽  
Author(s):  
J.-D. Nam ◽  
J. C. Seferis ◽  
S.-W. Kim ◽  
K.-J. Lee
Keyword(s):  
Gas Permeation ◽  
Manufacturing Processes ◽  
Viscoelastic Deformation ◽  
Composite Manufacturing

Numerical study of resin flow in VARTM composite manufacturing process

2020 ◽  
pp. 344-349 ◽  
Author(s):  
Pratik Patel ◽  
Tushar Gajjar ◽  
Dhaval Shah ◽  
Shashikant Joshi ◽  
Bimal Kumar Mawandiya
Keyword(s):  
Manufacturing Process ◽  
Numerical Study ◽  
Resin Flow ◽  
Composite Manufacturing
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