scholarly journals EFFECT OF POROSITY ON THE MECHANICAL STRENGTH OF COMPOSITE MATERIALS

2013 ◽  
pp. 85-87
Author(s):  
ANJALI ANJALI ◽  
SANJAY CHOUDHRY ◽  
VIJAY KUMAR
Keyword(s):  
Raw Materials ◽  
High Strength ◽  
Resin Matrix ◽  
Marine Structures ◽  
Reinforced Plastics ◽  
Polymer Resin ◽  
Reinforcement Fiber ◽  
Fiber Reinforced Plastics ◽  
Materials Used ◽  
Laminar Shear

Fiber reinforced plastics are the combination of a reinforcement fiber in a thermoset polymer resin matrix, where the reinforcement has an aspect ratio that enables the transfer of loads between fibers, and the fibers are chemically bonded to the resin matrix. FRP are used more and more for primary structures in Commercial ,industrial, aerospace and marine structures Mainly to reduce the weight and increases the strength. The strength of FRP reduce for various reason .among them presence of porosity is one of major factor. This paper describes the work performed by experimentally to analysis the effect of porosity on inter laminar shear strength(ILSS) properties of composite. The raw materials used in this study are epoxy resin with high strength carbon fibre & epoxy with glass fibre in the form of prepreg.

scholarly journals Performance analysis of the bump beams made of High Strength Steel and Carbon Fiber reinforce plastics

2018 ◽  
Vol 207 ◽  
pp. 03006
Author(s):  
Yi Yao ◽  
Quan Yuan ◽  
Sihuan Fu
Keyword(s):  
Carbon Fiber ◽  
Automobile Industry ◽  
High Strength Steel ◽  
Lightweight Design ◽  
High Strength ◽  
Research Directions ◽  
Deformation And Failure ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Fiber Reinforce

Lightweight and safe are the key research directions of the automobile industry. Bump beam is an important part of the car safety protection and it’s lightweight design has drawn much attention. In this paper, the static strength and the low-speed impact performances of two types of bump beam with the same structure, which made of carbon fiber reinforced plastics (CFRP) and high strength steel (HSS), were investigated. Under the condition of static press, frontal and 40% offset impact, part structural stiffness, component crush intrusion, energy absorption were comparison analyzed. In order to guide the product design, the deformation and failure of CFRP beams with five different laminate structures were simulated under frontal and 40% offset impact. The results indicate that, with the same structure, the properties of CFRP bump beam are generally superior to HSS product, more conducive to lightweight and the optimum design of the laminate is [0° / 60° / 120°]

Synthesis and Characterization of Carbon Nanofiber with Reinforced Polymer Resin Matrix Composite

Nano Hybrids ◽  
2016 ◽  
Vol 10 ◽  
pp. 20-27 ◽  
Author(s):  
S. Nallusamy ◽  
N. Manikanda Prabu
Keyword(s):  
Epoxy Resin ◽  
Carbon Nanofiber ◽  
High Strength ◽  
Nano Particles ◽  
Resin Matrix ◽  
X Ray Diffraction ◽  
Material Development ◽  
Polymer Resin ◽  
Nano Fiber ◽  
Resin Matrix Composite

Polymer composite with reinforced fiber is a remarkable development in the field of engineering materials. The applications of composite materials have significantly increased in Defense, Aeronautical and Automobiles because of its specific modulus and high strength characteristics. In composite material development, nano particles reinforcement and nano fiber reinforcement are the most recent methods developed. In this research electrospun carbon nanofiber reinforced mat with polymer epoxy resin composites was prepared. X-ray diffraction, scanning electron microscope and ultrasonic scanning were used to study the morphology and the defect on the specimens for analyzing the structural conditions of the samples for determining the mechanical properties. The result clearly indicates that the Carbon Nanofiber (CNF)/ Polyvinyl Alcohol (PVA) mat improves the flexural strength of the epoxy resin and that 0.015% CNF in PVA gives a better mechanical strength.

Study on the Effect of Different Joints Material on GRP Jacking Pipe

2011 ◽  
Vol 117-119 ◽  
pp. 995-998
Author(s):  
Jian Zhong Chen ◽  
Zhuo Qiu Li
Keyword(s):  
Deflection Angle ◽  
High Strength ◽  
Compression Stress ◽  
Reinforced Plastics ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Plastics ◽  
Long Life ◽  
The Deflection Angle ◽  
Jacking Force ◽  
Better Than

GRP (Glass fiber reinforced plastics) jacking pipe has many advantages, such as lightweight, high strength, corrosion resistance, long life, good hydraulic and so on. The key of GRP jacking pipe is the joints problem. There are two different joints material in GRP jacking pipe: GRP ring and steel ring. The effect of different joints material on the GRP jacking pipe is analyzed by ABAQUS. When the jacking pipe with jacking force, the deflection angle of the pipeline has significant effect on joints force, even if the 0.05° of deflection, the pipe axial compression stress will double. When the jacking pipe without jacking force, joints force related to free deflection angle of the joints. Through comparison the steel ring and GRP ring shows that GRP ring better than steel ring on the ability to withstand deflection.

Analysis of Optimal Autofrettage Pressure on CFRP Pressure Vessels Using ANSYS

2013 ◽  
Vol 331 ◽  
pp. 184-188
Author(s):  
Dong Xia Liu ◽  
Li Liang ◽  
Xing Lei Bao
Keyword(s):  
Carrying Capacity ◽  
High Strength ◽  
Optimization Method ◽  
Pressure Vessels ◽  
Working Pressure ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Finite Element Software ◽  
Fiber Reinforced Plastics ◽  
Autofrettage Pressure

For the pressure vessels made of high-strength Carbon Fiber Reinforced Plastics (CFRP) and Aluminum liner, the strength is provided by the CFRP, but the liner leak is always the bottleneck of the vessels’ safety. The carrying capacity and anti-fatigue ability of CFRP pressure vessels is largely depend on the elastic deformation range. In this research the principle of autofrettage is analyzed, the mechanical character of a certain 2 liters pressure vessel is analyzed using finite element software ANSYS, and the optimal autofrettage pressure is calculated by optimization method. The results showed that the stresses of the liner under working pressure were decreasing while applying the autofrettage pressure. The liner would gain the best plastic level under the appropriate autofrettage pressure.

Temperature Dependence of Sound Velocity in High-Strength Fiber-Reinforced Plastics

2003 ◽  
Vol 42 (Part 1, No. 8) ◽  
pp. 5205-5207 ◽  
Author(s):  
Ryuji Nomura ◽  
Keiichi Yoneyama ◽  
Futoshi Ogasawara ◽  
Masashi Ueno ◽  
Yuichi Okuda ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Sound Velocity ◽  
High Strength ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
High Strength Fiber

scholarly journals Development of High Strength Porous Tile by Recycling of Waste Glass Fiber Reinforced Plastics

2010 ◽  
Vol 76 (771) ◽  
pp. 1507-1513 ◽  
Author(s):  
Hiroyuki KINOSHITA ◽  
Koichi KAIZU ◽  
Tomokazu TAKEDA ◽  
Hiromori MIYAGI ◽  
Ryusuke KAWAMURA ◽  
...  
Keyword(s):  
Glass Fiber ◽  
High Strength ◽  
Waste Glass ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Plastics

scholarly journals Experimental Determination of the Coefficient of Restitution for Selected Modern Hybrid Composites

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5638
Author(s):  
Witold Wojciech Skórski ◽  
Marcin Obszański ◽  
Maciej Zawisza
Keyword(s):  
Composite Materials ◽  
Hybrid Composites ◽  
Digital Camera ◽  
Coefficient Of Restitution ◽  
Resin Matrix ◽  
Body Parts ◽  
Reinforced Plastics ◽  
First Case ◽  
Materials Used ◽  
Mechanical Devices

Composite materials (fiber reinforced plastics, FRPs) are successfully utilized in the production of various mechanical devices, including land vehicles, marine vessels, and aircrafts. They are primarily used for the production of body parts and hulls. Due to their importance, certain requirements relating to the mechanical properties of the materials used must be met for such applications. One aspect of the passive safety of vehicles is the effects of a possible collision with another object. The behavior of the structure in such a case can be determined based on the coefficient of restitution, which is a measure of energy dissipation after an impact. This paper presents the results of measuring the value of the coefficient of restitution for the selected composite materials, utilizing various reinforcement materials including different types of fibers and wooden veneer. The selected materials included glass, carbon, Kevlar fibers, and veneer from exotic wood in an epoxy resin matrix. The tested samples were made using various methods in order to understand the influence of the technology on the value of the coefficient. The authors determined the coefficient values utilizing two methods based on the measurement of two different physical quantities. In the first case, the height of the rebound of the ram was measured using a fast digital camera; in the second case, the time between successive rebounds of the tool was measured, determined based on the signal from the acceleration sensor. The authors compared the results of the coefficient values obtained using these methods and examined the relationship between the rebound energy and the value of the coefficient of restitution. The results have been discussed, and some conclusions have been made. Among other things, it seems that both methods of measurement are interchangeable with regard to lower impact velocities corresponding to lower heights (up to 300 mm) of the drop of the ram used in the tests.

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