Thermomechanical Characteristics of Compacted and Non-Compacted Plain Weave Woven Laminated Composites

2017 ◽  
Author(s):  
Maryam H. Al Kuwaiti ◽  
Abdel-Hamid I. Mourad
Keyword(s):  
Laminated Composites ◽  
Industrial Applications ◽  
Thermomechanical Properties ◽  
Pressure Vessels ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Plain Weave ◽  
Thermomechanical Characteristics ◽  
Insignificant Difference ◽  
Bagging Method

Nowadays, fiber reinforced composites are widely used in variety of industrial applications such as aircraft structures, automotive, pressure vessels and piping, etc. Aircraft standard fabrication process requires certain level of vacuum compaction (debulking) during the lay-up process, and a standard bagging method for curing in an autoclave. Every compacted component cured in an autoclave needs to be vacuum bagged employing edge breathers or bleeders and surface breathers. This process is repetitive and time consuming, and therefore needs further investigation. In this research, the combined effect of the removal of compaction and edge breathing on the thermomechanical behavior of plain weave woven laminated composites is studied. Tests have been conducted on 12 lamina plain weave composite specimens. Results indicated an insignificant difference on the thermomechanical properties between compacted and non-compacted specimens. Tensile, ILSS, flexural and DSC tests confirm that for the 12 lamina specimens compaction and edge breathing are not needed.

scholarly journals Simulation-based development of adaptive fiber-elastomer composites with embedded shape memory alloys

2017 ◽  
Vol 48 (1) ◽  
pp. 322-332 ◽  
Author(s):  
Ch Cherif ◽  
R Hickmann ◽  
A Nocke ◽  
R Fleischhauer ◽  
M Kaliske ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Raw Materials ◽  
Experimental Testing ◽  
Industrial Applications ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Wide Range

Fiber-reinforced composites are currently being used in a wide range of lightweight constructions. Function integration, in particular, offers possibilities to develop new, innovative products for a variety of applications. The large amount of experimental testing required to investigate these novel material combinations often hinders their use in industrial applications. This paper presents an approach that allows the layout of adaptive, fiber-reinforced composites by the use of numerical simulation. In order to model the adaptive characteristics of this functional composite with textile-integrated shape memory alloys, a thermo-elastic simulation is considered by using the Finite Element method. For the numerical simulation, the parameters of the raw materials are identified and used to generate the model. The results of this simulation are validated through deflection measurements with a specimen consisting of a glass fiber fabric with structurally integrated shape memory alloys and an elastomeric matrix system. The achieved experimental and numerical results demonstrate the promising potential of adaptive, fiber-reinforced composites with large deformation capabilities.

Biocomposites - State of the Art

2014 ◽  
Vol 657 ◽  
pp. 397-401
Author(s):  
Dragos Hodorogea
Keyword(s):  
Materials Science ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Fiber Type ◽  
Industrial Applications ◽  
Green Technology ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Plant Fibers

Due to ecological and sustainability constraints, in late years we see great achievements in green technology in the field of materials science. The development of high-performance biocomposites (made from natural resources) is increasing worldwide. The challenge in working with natural fiber reinforced composites is the large spectrum of possibilities for making them.Biocomposites properties are influenced by a number of variables, including the fiber type, environmental conditions (where the plant fibers are sourced), processing methods, and any modification of the fiber. It is well known that recently exists a large interest in the industrial applications of composites containing biofibers reinforced with biopolymers. The characteristics of reinforcing fibers used in biocomposites, including source, type, structure, composition, as well as mechanical properties, will be reviewed. The variety of biocomposite processing techniques as well as the factors (moisture content, fiber type and content, coupling agents and their influence on composites properties) affecting these processes will be discussed.Techniques for processing the natural fiber reinforced composites will be discussed based on thermoplastic matrices (compression molding, extrusion, injection molding, and thermoforming), and thermosets (resin transfermolding, sheet molding compound). Their influence on mechanical performance (tensile, flexural and impact properties) will be evaluated. Finally, the work will conclude with recent developments and future trends of biocomposites.

Assessment of Induced Delamination During End-Milling of Natural Fiber Reinforced Composites: A Statistical Analysis

2018 ◽  
Author(s):  
Khalid I. Alzebdeh ◽  
Mahmoud M. A. Nassar ◽  
Nasr Al-Hinai
Keyword(s):  
Feed Rate ◽  
Natural Fiber ◽  
End Milling ◽  
Processing Parameters ◽  
Industrial Applications ◽  
Fiber Reinforced Composites ◽  
Depth Of Cut ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Axial Depth

The use of natural fiber reinforced composites has emerged as an advantageous option in many industrial applications. Generally, composites are manufactured in net or near-net shape, but under specific design specifications, secondary manufacturing processes such as drilling, milling and turning become a requirement. In this context, current paper presents an experimental study that investigates the machinability of newly developed natural fiber composites under conventional end-milling. Two types of bio-composites; date palm fronds reinforced polypropylene (DPF/PP) and pine needles reinforced polypropylene composite (PN/PP) were developed and physically tested in order to optimize their mechanical strength. Then, machinability of such class of bio-composites is statistically analyzed using Design of Experiment method. Statistical modeling including response surface plots are utilized to analyze the combined effect of input processing parameters (feed rate, axial depth, spindle speed) on the induced delamination during end-milling. It is shown that feed rate is the most dominant factors in DPF/PP milling, and axial depth of cut is the most significant factor on PN/PP milling. Results are also compared with those of milled neat polypropylene, which confirm that delamination of machined bio-composites can be improved over the neat polypropylene matrix. This qualifies the developed bio-composites to be used in industrial applications in which machining is required.

Experimental Investigation of Chemical and Tensile Properties of Sansevieria Cylindrica Fiber Composites

2020 ◽  
Vol 979 ◽  
pp. 58-62
Author(s):  
N. Balaji ◽  
S Balasubramani ◽  
T. Ramakrishnan ◽  
Y. Sureshbabu
Keyword(s):  
Fiber Length ◽  
Polyester Resin ◽  
Natural Fiber ◽  
Plastic Material ◽  
Fiber Composites ◽  
Industrial Applications ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Alternative Material ◽  
Automobile Components

The natural fiber reinforced composites are least expensive material and alternative material of wood, plastic material for the construction and industrial applications. The polymer based composites are used to fabricate the automobile components. The present investigation the composite materials reinforced with sansevieria cylindrica fibers were fabricated. These fibers were used because of their impressive mechanical properties. The composite panels are fabricated by hand lay-up technique. Sansevieria cylindrica fibers and polyester resin to produce the composite material. Sansevieria cylindrica plant has each leaf 20 to 30mm thickness and height 1000 to 2000mm approximately. The chemical tests of fiber and tensile strength for different fiber length composites such as 10mm, 20mm, 30mm, 40mm, & 50mm are determined.

Extraction, Treatment and Applications of Natural Fibers for Bio-Composites – A Critical Review

2021 ◽  
Vol 36 (2) ◽  
pp. 114-130
Author(s):  
S. Sathish ◽  
L. Prabhu ◽  
S. Gokulkumar ◽  
N. Karthi ◽  
D. Balaji ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Natural Fiber ◽  
Natural Fibers ◽  
Weight Ratio ◽  
Industrial Applications ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Complete Evaluation ◽  
Physical And Chemical

Abstract Nowadays, sustainable and eco-friendly products are gaining more attention in various engineering industries owing to their considerable strength-to-weight ratio, abundant availability, and recyclability. The properties of biofibers depend on the cultivation method, environmental conditions, and extraction method. Biofibers are hauled out by dew retting, water retting, and mechanical decortication methods. The properties of natural fiber–reinforced composites can be enhanced by proper physical and chemical treatments. The aim of this study is to propose a complete evaluation of the different extraction methods applied on natural fibers. Various physical and chemical treatment methods were used to ascertain the properties of optimized natural fiber-reinforced composites for various industrial applications. The key findings derived from various existing data and the chemical treatment results of the biofiber-reinforced composite are specifically highlighted with critical assessment. The properties and use of natural fiber-reinforced composites in the various fields of applications have made them candidates of choice over synthetic petroleum–based fibers.

Graphite Fiber/Polyimide Composites with Improved Processability

1993 ◽  
Vol 305 ◽  
Author(s):  
Peter Delvigs ◽  
David L. Klopotek ◽  
Paul J. Cavano
Keyword(s):  
Glass Transition ◽  
Dimethyl Ester ◽  
Thermomechanical Properties ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Graphite Fiber ◽  
Thermooxidative Stability ◽  
Polyimide Composites ◽  
Polyimide Matrix ◽  
Monomethyl Ester

AbstractIn an effort to improve the processing characteristics of addition-type polyimide matrix resins, the use of flexibilized three-ring and four-ring aryl diamines was investigated. A series of fourteen diamines containing carbonyl and methylene, as well as thio connecting groups was synthesized. The diamines were polymerized with the dimethyl ester of 3,3,′4,4′-benzophenonetetracarboxylic acid, using the monomethyl ester of nadic acid as an end cap. The effect of diamine structure on the solubility and rheological properties during cure, as well as glass transition temperature and thermooxidative stability of neat resins was determined. Graphite fiber-reinforced composites were fabricated from selected resin formulations, and composite thermomechanical properties were investigated.

Brittle-Ductile Transition in Fiber-Reinforced Composites

1998 ◽  
Vol 09 (06) ◽  
pp. 851-856 ◽  
Author(s):  
Ismael L. Menezes-Sobrinho ◽  
José-Guilherme Moreira ◽  
Américo T. Bernardes
Keyword(s):  
Stochastic Model ◽  
Computer Simulations ◽  
Industrial Applications ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Microscopic Mechanism ◽  
Self Organized ◽  
Brittle Ductile Transition ◽  
Self Organized Criticality

Fiber-reinforced composites are a class of material with increasing industrial applications. Computer simulations have been used in order to understand the microscopic mechanism which can explain their mechanical behavior and several models have been introduced in the last decade. In this paper we introduce a criterion to define the brittle-ductile transition region in unidirectional fiber-reinforced composites. In order to simulate a fiber bundle, a recently introduced stochastic model is used. The results obtained with our criterion are compared with those obtained by using a self-organized criticality (SOC) approach.

Sign in / Sign up

Export Citation Format

Share Document