Tensile Characteristics of Epoxy/Jute Biocomposites Prepared by Vacuum Infusion

2018 ◽  
pp. 574-580 ◽  
Author(s):  
Petr Valášek ◽  
Miroslav Müller
Keyword(s):  
Vacuum Infusion

scholarly journals End-of-Life Alternatives of Glass Reinforced Polyester Boat Hulls Compared by LCA

2018 ◽  
Vol 27 (4) ◽  
pp. 096369351802700 ◽  
Author(s):  
Mehmet Önal ◽  
Gökdeniz Neşer
Keyword(s):  
End Of Life ◽  
Environmental Impacts ◽  
Raw Materials ◽  
Weight Ratio ◽  
Cost Effective ◽  
Raw Material ◽  
Photochemical Oxidation ◽  
Human Toxicity ◽  
Vacuum Infusion ◽  
Infusion Method

Glass reinforced polyester (GRP), as a thermoset polymer composites, dominates boat building industry with its several advantages such as high strength/weight ratio, cohesiveness, good resistance to environment. However, proper recovering and recycling of GRP boats is became a current environmental requirement that should be met by the related industry. In this study, to propose in a cost effective and environmentally friendly way, Life Cycle Assessment (LCA) has been carried out for six scenarios include two moulding methods (namely Hand Lay-up Method, HLM and Vacuum Infusion Method, VIM) and three End-of-Life (EoL) alternatives(namely Extruding, Incineration and Landfill) for a recreational boat's GRP hulls. A case study from raw materials purchasing phase to disposal/recycling stages has been established taking 11 m length GRP boat hull as the functional unit. Analysis show that in the production phase, the impacts are mainly due to the use of energy (electricity), transport and raw material manufacture. Largest differences between the methods considered (HLM and VIM) can be observed in the factors of marine aquatic ecotoxicity and eutrophication while the closest ones are abiotic depletion, ozon layer depletion and photochemical oxidation. The environmental impact of VIM is much higher than HLM due to its higher energy consumption while vacuum infusion method has lower risk than hand lay-up method in terms of occupational health by using less raw material (resin) in a closed mold. In the comparison of the three EoL techniques, the mechanical way of recycling (granule extruding) shows better environmental impacts except terrestrial ecotoxicity, photochemical oxidation and acidification. Among the EoL alternatives, landfill has the highest environmental impacts except ‘global warming potential’ and ‘human toxicity’ which are the highest in extrusion. The main cause of the impacts of landfill is the transportation needs between the EoL boats and the licenced landfill site. Although it has the higher impact on human toxicity, incineration is the second cleaner alternative of EoL techniques considered in this study. In fact that the similar trend has been observed both in production and EoL phases of the boat. It is obvious that using much more renewable energy mix and greener transportation alternative can reduce the overall impact of the all phases considerably.

The Limits of Vacuum Infusion Technology during the Production of Filled Polymer Composite Systems

2018 ◽  
Vol 919 ◽  
pp. 175-181
Author(s):  
Soňa Rusnáková ◽  
Milan Žaludek
Keyword(s):  
High Tech ◽  
Smoke Toxicity ◽  
Hot Wire ◽  
Bending Properties ◽  
Vacuum Infusion ◽  
Composite Systems ◽  
Flammability Test ◽  
Fire Smoke ◽  
Investment Cost ◽  
One Step

The vacuum infusion process (VIP) is suitable for production of bigger prototypes and low-series production, but their utilization is increasing because their low investment cost, comparability with high-tech technology (pre-preg), possibility to produce sandwich structures in one step and many various advantages.We verify the possibility of VIP to produce various prototypes with increasing degree of flame retarders, specifically aluminium hydroxide (ATH), which fulfil regiments to mechanical and Fire-Smoke-Toxicity (FST) properties according EN 45 545. Mechanical properties we confirmed by testing of bending properties according EN ISO 178 and tensile properties according EN ISO 527-4. FST properties were confirm by flammability test with hot wire according EN ISO 60695-2-11.

Vacuum infusion molding process part 1: VIMP based on a high-permeable medium

2003 ◽  
Vol 18 (3) ◽  
pp. 72-75 ◽  
Author(s):  
Zhu Ying-dan ◽  
Wang Ji-hui ◽  
Yang Zui ◽  
Tan Hua
Keyword(s):  
Molding Process ◽  
Vacuum Infusion

Attribute Based Selection of Thermoplastic Resin for Vacuum Infusion Process

2011 ◽  
Vol 1 (3) ◽  
pp. 31-52 ◽  
Author(s):  
R. T. Durai Prabhakaran ◽  
Aage Lystrup ◽  
Tom Løgstrup Andersen
Keyword(s):  
Material System ◽  
Mathematical Tool ◽  
Thermoplastic Resin ◽  
Thermoplastic Polymers ◽  
Vacuum Infusion ◽  
Thermosetting Polymers ◽  
Current Scenario ◽  
New Material ◽  
Selection Of ◽  
Vacuum Infusion Process

The composite industry looks toward a new material system (resins) based on thermoplastic polymers for the vacuum infusion process, similar to the infusion process using thermosetting polymers. A large number of thermoplastics are available in the market with a variety of properties suitable for different engineering applications, and few of those are available in a not yet polymerised form suitable for resin infusion. The proper selection of a new resin system among these thermoplastic polymers is a concern for manufactures in the current scenario and a special mathematical tool would be beneficial. In this paper, the authors introduce a new decision making tool for resin selection based on significant attributes. This article provides a broad overview of suitable thermoplastic material systems for vacuum infusion process available in today’s market. An illustrative example—resin selection for vacuum infused of a wind turbine blade—is shown to demonstrate the intricacies involved in the proposed methodology for resin selection.

Modeling of post-filling stage in vacuum infusion using compaction characterization

2014 ◽  
Vol 49 (16) ◽  
pp. 1947-1960 ◽  
Author(s):  
Baris Caglar ◽  
Bekir Yenilmez ◽  
E Murat Sozer
Keyword(s):  
Vacuum Infusion ◽  
Filling Stage

Correlation between Process Parameters with Flexural Properties of Hybrid Glass/Jute Fibre Reinforced Epoxy Composite Fabricated via Vacuum Infusion Technique

2015 ◽  
Vol 761 ◽  
pp. 531-535
Author(s):  
Noraiham Mohamad ◽  
Mohd Fadli Hassan ◽  
Siang Yee Chang ◽  
Qumrul Ahsan ◽  
Yuhazri Yaakob ◽  
...  
Keyword(s):  
Epoxy Composite ◽  
Processing Parameters ◽  
Bending Test ◽  
Flexural Properties ◽  
Jute Fibre ◽  
Soaking Time ◽  
Three Point Bending ◽  
Vacuum Infusion ◽  
Supply Pressure ◽  
Infusion Technique

Flexural properties of hybrid glass/jute fibre reinforced epoxy composites were optimised by response surface methodology. The processing parameters of vacuum infusion technique such as supply pressure, soaking time and use of flow media were investigated. The flexural properties of the resulting composites were evaluated using three-point bending test in accordance with the ASTM D790-03 standard. The flexural strength of ~195 MPa and elastic modulus of ~13412 MPa were achieved at optimum parameter of 100 kPa pressure, 120 minutes soaking time with the utilization of flow media during vacuum infusion process.

Active control of the vacuum infusion process

2007 ◽  
Vol 38 (5) ◽  
pp. 1271-1287 ◽  
Author(s):  
Dhiren Modi ◽  
Nuno Correia ◽  
Michael Johnson ◽  
Andrew Long ◽  
Christopher Rudd ◽  
...  
Keyword(s):  
Active Control ◽  
Vacuum Infusion ◽  
Vacuum Infusion Process

scholarly journals Evaluation of the vacuum infusion process objectives at the early stages of computer simulation

2021 ◽  
Vol 2090 (1) ◽  
pp. 012004
Author(s):  
J-P Huang ◽  
I Zhilyaev ◽  
N Snezhina ◽  
S Shevtsov
Keyword(s):  
Composite Structures ◽  
Volume Fraction ◽  
Computation Time ◽  
Richards Equation ◽  
Degree Of Cure ◽  
Vacuum Infusion ◽  
Resin Injection ◽  
Simplifying Assumptions ◽  
Element Computation ◽  
Infusion Method

Abstract Increasing the quality and reliable reproducibility of large-size composite structures molding using the vacuum infusion method, which is gaining popularity in various industries, is achieved in practice through numerous tests by try and errors that require significant costs and time. The purpose of these tests is to determine the layout of the ports for the resin injection and vacuum supply, as well as the temperature regime that ensures the absence of isolated non-impregnated zones, the minimum porosity and the required reinforcement volume fraction in the composite. The proposed approach removes the simplifying assumptions used in commercial software for modeling the process, which reduce the accuracy of reconstruction of its dynamics and the sensitivity to the formation of unrepairable defects such as dry spots. It involves multiphysics modeling of resin filling in a porous preform by describing the resin front dynamics by the phase field equation, pressure distribution in an unsaturated porous medium by the Richards equation, the evolution of the degree of cure by the convection / diffusion / thermokinetics equation, and thermal processes by the heat transfer equation using modified models of viscosity, the diffusion coefficient of the degree of cure, the boundary condition for the vacuum port. To reduce the finite element computation time of the investigated variants of the process, which is necessary for its computer optimization, the predictive partial sub-criteria were used, which give a reliable prediction before the beginning of the resin gel and solidification. Due to this, a gain in computation time is 30-50% with a significant prediction accuracy of quality objectives and the presence of possible defects.

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