Bio-Inspired Synthesis of Al2O3/Polymer Composite

2012 ◽  
Vol 724 ◽  
pp. 107-110
Author(s):  
Kyung Mok Nam ◽  
Yoon Joo Lee ◽  
Soo Ryong Kim ◽  
Woo Teck Kwon ◽  
Hyung Sun Kim ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Bending Strength ◽  
High Strength ◽  
Organic Polymer ◽  
Ceramic Plate ◽  
Light Weight ◽  
Polymeric Compound ◽  
Inorganic Hybrid ◽  
Inorganic Composite

The formation of organic-inorganic hybrid composite with ceramic platelets and polymeric compound can have the higher strength and higher elasticity than metal, which is a nanocomposite with high strength and light weight. Ceramic platelet such as Al2O3has been used to form organic-inorganic composite material using PMMA as an organic polymer. Bending strength and density of the composites prepared by infiltration and post-warm pressing were measured. FE-SEM and TG analysis were carried out to determine the microstructure of the organic-inorganic composite materials. Bending strengths and densities of the composites prepared by Al2O3ceramic plate and PMMA after post-warm pressing were ~70MPa and ranged from 2.4 to 2.6, respectively.

Current Situation and Prospect of the Application of FRP in Material Engineering

2014 ◽  
Vol 898 ◽  
pp. 375-377
Author(s):  
Xiao Lin Dong
Keyword(s):  
Composite Material ◽  
Fatigue Resistance ◽  
Civil Engineering ◽  
Temperature Stability ◽  
High Strength ◽  
Current Situation ◽  
Light Weight ◽  
Wood Structure ◽  
Frp Composites ◽  
Frp Composite

The FRP composite material can replace the traditional under certain conditions, the wood structure of steel and reinforced materials, with high strength, light weight, resistance to corrosion and fatigue resistance, temperature stability and good special, because by civil engineeringcircles. This paper introduces the characteristics of FRP composites, the application of FRP composites in civil engineering are discussed, finally, the prospect of FRP materials are introduced.

Suppression of Internal Damping-Induced Instability Using Adaptive Techniques

2007 ◽  
Author(s):  
Andra´s Simon ◽  
George Flowers
Keyword(s):  
Composite Materials ◽  
Simulation Modeling ◽  
High Speed ◽  
High Strength ◽  
Light Weight ◽  
Internal Damping ◽  
Modeling And Analysis ◽  
Rotor Systems ◽  
Rotor Spinning ◽  
High Speeds

Advanced rotor systems, for such applications as high-speed flywheel systems, consist (in a basic fashion) of a lightweight rotor spinning at relatively high speeds and supported by magnetic bearings. Composite materials are an extremely attractive choice for such rotor designs, offering high strength with light-weight. However, there are a number of issues that must be addressed for such efforts to be successful. Specific issues include imbalance control and active techniques to suppress internal damping-induced instability. A detailed description of the problem being considered and a strategy for solving it are presented. Simulation modeling and analysis results are presented and discussed to illustrate the method and demonstrate its effectiveness.

The Relation of the Interlaminar Fracture Toughness and the Acoustic Emission (Ae) under the Enf Test

2007 ◽  
Vol 353-358 ◽  
pp. 279-282
Author(s):  
Juho Kwak ◽  
Yu Seong Yun ◽  
Oh Heon Kwon
Keyword(s):  
Fracture Toughness ◽  
Composite Materials ◽  
Laminate Composite ◽  
High Strength ◽  
Light Weight ◽  
Interlaminar Fracture Toughness ◽  
Laminate Composites ◽  
Interlaminar Fracture ◽  
Good Corrosion Resistance ◽  
Enf Test

Recently, composite materials are used in many fields because their properties are high strength, high stiffness, and they have light weight, good corrosion resistance and good thermal conductivity. However, composite materials have relatively a lot of problems, especially delamination, compared with common materials such as a steel and aluminum, etc. Therefore, having the interlaminar fracture toughness for a laminate composite is important. In this study, the end notched flexure (ENF) specimens are employed in order to evaluate modeⅡ interlaminar fracture toughness for CFRP laminate composites. Three kinds of a/L ratio were applied to these specimens under the different pressure level. Also, we discuss the relation of crack growth and the interlaminar fracture toughness in terms of AE characteristics using ENF test.

scholarly journals PENGEMBANGAN MATERIAL RINGAN SERAT GELAS PADA INDUSTRI KERETA API

2020 ◽  
Vol 19 (3) ◽  
pp. 187-194
Author(s):  
Oki Kurniawan ◽  
Willy Artha Wirawan ◽  
Akbar Zulkarnain
Keyword(s):  
Tensile Strength ◽  
Composite Material ◽  
Composite Materials ◽  
Manufacturing Industry ◽  
Bending Strength ◽  
Transportation Industry ◽  
Fiber Glass ◽  
Railroad Industry ◽  
The Matrix ◽  
Glass Reinforcement

Abstract The use of composite materials has been developed in the railroad transportation industry sector in Indonesia. For example, PT INKA has used composite materials with fiber glass reinforcement. The purpose of this study is to determine the characteristics of tensile strength and bending strength of the composite material so that it can be proposed to be further developed and utilized by the manufacturing industry, especially the railroad industry. In this study, 4 types of matrix variations were examined, namely epoxy, repoxy, polyester, and bhispenol using fiber glass reinforcement. Tensile strength and bending strength tests were performed in accordance with the ASTM D-638 and the ASTM D-790 standards, respectively. The results of this study indicate that the variation of the matrix is very influential on the tensile strength and bending strength of composite materials. Keywords: composite material, glass fiber, tensile strength, bending strength  Abstrak Penggunaan material komposit mulai banyak dikembangkan di sektor industri trasportasi kereta api di Indone-sia. Sebagai contoh, PT INKA sudah menggunakan material komposit dengan penguat serat gelas. Tujuan penelitian ini adalah untuk mengetahui karakteristik kekuatan tarik dan kekuatan bending material komposit agar dapat diusulkan untuk lebih dikembangkan dan dimanfaatkan oleh industri manufaktur, khususnya industri kereta api. Pada penelitian ini digunakan 4 jenis variasi matriks, yaitu epoxy, repoxy, polyester, dan bhispenol dengan menggunakan penguat serat gelas. Pengujian kekuatan tarik menggunakan standar ASTM D-638 dan pengujian bending menggunakan standar ASTM D-790. Hasil studi ini menunjukkan bahwa variasi matriks sangat berpengaruh pada kekuatan tarik maupun kekuatan bending material komposit. Kata-kata kunci: material komposit, serat gelas, kekuatan tarik, kekuatan bending

scholarly journals Structural features of composite materials made of hydrolyzed birch wood

2021 ◽  
Vol 25 (4) ◽  
pp. 89-98
Author(s):  
Yu.G. Skurydin ◽  
◽  
E.M. Skurydina ◽  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Shear Modulus ◽  
Bending Strength ◽  
Structural Features ◽  
Dynamic Shear Modulus ◽  
Birch Wood ◽  
Dynamic Shear ◽  
Amorphous Component ◽  
Wood Processing

Structural features and physical and mechanical characteristics of plate composite materials are investigated. The materials are obtained from hydrolyzed birch wood by hot pressing without the addition of binding components. Wood processing is carried out by the method of explosive autohydrolysis without chemical reagents. The influence of pre-moistening of wood on the structure and properties of the composite material is studied. The structural features of the amorphous and crystalline components of the composite material are studied. It was found that the composite material obtained from pre-dried and pre-moistened wood retains the crystalline phase that is present in the original wood. Changes in the structure of wood when obtaining composite materials based on it occur in the amorphous component. Based on the temperature dependences of the dynamic shear modulus and the tangent of the angle of mechanical losses, information on the glass transition temperature of a complex of amorphous components of a composite material is obtained. It was found that the region of transition of lignin and hemicellulose macrochains from a glassy to a highly elastic state in the composite material is shifted towards low temperatures in comparison with the original wood. The offset is more than 70K. It is assumed that structural plasticization is the main cause of the detected effect. Pre-moistening of wood does not affect the position of the temperature transition in the amorphous component of the composite material. The study of the diffusion and sorption of water vapor in the samples of the material shows the presence of large structural inhomogeneities. Diffusion processes obey Fick’s second law and correlate with the density of samples. Data on density, static bending strength, water absorption and swelling characteristics of composite material samples were obtained. It is shown that the use of pre-moistening of wood before barothermal treatment significantly improves the structural uniformity of the resulting material. The value of the dynamic shear modulus at room temperature in comparison with the same indicator for the material obtained on the basis of dry wood increases three times. Mechanical losses are reduced, mechanical strength increases.

Application of New Design Method by High-Strength Composite Material

2014 ◽  
Vol 607 ◽  
pp. 915-919 ◽  
Author(s):  
Haruhiko Iida ◽  
Toshiaki Fujishima ◽  
Yoshifumi Ohbuchi ◽  
Hidetoshi Sakamoto
Keyword(s):  
Composite Materials ◽  
Product Design ◽  
Design Method ◽  
High Strength ◽  
New Product ◽  
Point Of View ◽  
Light Weight ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Separate Product

The purpose of this study is to apply a new design method, which integrates both optimum strength and product design. Here, the collaboration of design and strength by using composite materials is administered. Many products, which are made from high strength composite materials, require new product design technology. Existing product developments tend to separate product design from product planning. The process begins from planning the shape of the product, then calculating the strength, and lastly designing the product. In our new design method, we create from an engineering point of view. By using a design method of high-strength materials, we designed a new ZIGZAG CHAIR made of carbon fiber reinforced plastic of excellent strength and light-weight.

Preliminary Design of Tubular Composite Structures Using Netting Theory and Composite Degradation Factors

1995 ◽  
Vol 117 (4) ◽  
pp. 390-394 ◽  
Author(s):  
B. W. Tew
Keyword(s):  
Corrosion Resistance ◽  
Composite Materials ◽  
Cyclic Loading ◽  
Composite Structures ◽  
High Strength ◽  
Preliminary Design ◽  
Light Weight ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Design Calculations

Tubular products and process vessels built using fiber-reinforced composite materials provide significant advantages in applications that require corrosion resistance, high strength, and light weight. A design approach based on netting theory is presented which enables engineers to develop preliminary structural designs for these structures using composite materials. The integration of creep, cyclic loading, and environmental degradation factors into initial design calculations is also discussed and illustrated.

The Collapse Characteristics of CFRP Hat-Shaped Sectional Members under Moisture Absorptions Having the Temperature Change

2013 ◽  
Vol 535-536 ◽  
pp. 426-429
Author(s):  
Yong Jun Yang ◽  
In Young Yang ◽  
Ju Ho Choi
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Moisture Absorption ◽  
Chemical Properties ◽  
High Strength ◽  
Steel Plates ◽  
Extreme Condition ◽  
Design Data ◽  
Collapse Characteristics ◽  
Cfrp Composite

CFRP composite with light weight, high strength, and high elasticity compared to metal is widely used rather than previous steel plates. However, CFRP composite material has the weakness in hygrothermal and impact collapsed environment. Especially, moisture absorption into composite material under hygrothermal environment can change molecule arrangement and chemical properties. Therefore, the purpose of this study lies in acquiring quantitative design data that can be put into the practice by comparing and evaluating the strength degradation under the environment where the moisture is absorbed by conducting static and impact collapse test after setting extreme condition for CFRP composite that takes consistent form such as frontal side members that is actually used in vehicle. This study compared and studied change in the progress of a moisture absorption ratio after setting up the temperature of 60 degrees, and 80 degrees in order to comprehend how the change in the temperature impacts on moisture absorption status inside CFRP composite materials. As a result of this study showed that the strength reduction of about 50% appears due to moisture absorptions. In addition, it showed that the higher the temperature is, the more rapid the progress of a moisture absorption inside CFRP composite materials is. Accordingly, it showed that the change in matrix also has a weak point.

scholarly journals Failure Analysis of Woven Kevlar/Epoxy under Uniaxial Tension

2018 ◽  
Vol 7 (4.26) ◽  
pp. 235
Author(s):  
Norzihan Rahimi ◽  
Ahmad Kamil Hussain ◽  
Mohd Sultan Ibrahim Shaik Dawood ◽  
Adib Zulfadhli Mohd Alias ◽  
Muhamed Hafiy Afiq Md Yusoff ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Failure Analysis ◽  
Uniaxial Tension ◽  
Weight Ratio ◽  
High Strength ◽  
Fiber Failure ◽  
Stress Theory ◽  
Failure Behaviour ◽  
Finite Element Software

The increasing demand for newer materials with versatile properties such as high strength-to-weight ratio; has made fiber reinforced composite materials a favourable choice in various applications, particularly in the automotive, aerospace, marine, sports and defense industries. Moreover, the properties of a composite material could be tailored for specific functions or applications. Despite its many attractive features, composite material fails in a complex manner involving matrix failure, fiber failure and delamination. This failure behaviour needs to be well established. The objective of this study is to perform failure analysis on a woven Kevlar/Epoxy composite laminate subjected to uniaxial tension and establish its failure trend. The lamination sequence is (θ4/04/-θ4)S where the angle, θ, ranges from 0o to 90o. The failure analysis was carried out using a commercial finite element software, Ansys and comparisons were made using analytical methods (Matlab). The values of stresses were computed and Maximum Stress Theory was employed to check for failure. The trend of failure, in terms of the failure curves (normalized first ply failure and last ply failure loads), for woven Kevlar/Epoxy was established. This study had produced new failure datas for woven Kevlar/Epoxy and thus, contributes significant knowledge about the failure behaviour of composite materials.  

scholarly journals Research on the Decorative Design of Inorganic Composite Boards in Assembled Residential Houses

2020 ◽  
Vol 189 ◽  
pp. 03020
Author(s):  
Yue Zhong ◽  
Xiuyun Li ◽  
Xun’e Zhou
Keyword(s):  
High Strength ◽  
Green Technology ◽  
Light Weight ◽  
Interior Decoration ◽  
The Family ◽  
Reference Design ◽  
Installation Technology ◽  
Inorganic Composite ◽  
Decorative Design ◽  
Main Material

In the context of the industrialization of construction, prefabricated structures and interior decoration are developing rapidly. The residential integrated ceiling module selects one of the inorganic composite panels, inorganic high-strength sound absorbing board, as the main material, and introduces the light-weight, high-strength, energy-saving and environmentally friendly characteristics of inorganic highstrength sound-absorbing panels, as well as the acoustic structure and installation technology of the integrated ceiling in multiple spaces of the family residence, providing reference design scheme for the application of green technology in the residential integrated ceiling.

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