Prevention from Delamination of Composite Material during Drilling Using Ultrasonic Vibration

2005 ◽  
Vol 291-292 ◽  
pp. 465-470 ◽  
Author(s):  
Shigeru Aoki ◽  
Seiji Hirai ◽  
Tadashi Nishimura
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Ultrasonic Vibration ◽  
Analytical Method ◽  
Weight Ratio ◽  
Adhesive Layer ◽  
Experimental Results ◽  
Machining Processes ◽  
Machined Surface ◽  
Hard Metals

Composite materials are used for many structures because of its high strong-to-weight ratio and easy formation. Secondary machining processes such as drilling and sawing are required to assemble and join composite materials to other structures. When composite materials are machined, delamination occurs at adhesive layer between laminated layers. It is well known that it is possible to cut hard metals and to improve precision of machined surface by using ultrasonic vibration. This method is applied to machining composite materials in this paper. Drilling of composite materials is focused on. First, this method is examined experimentally. Next, experimental results are examined by analytical method. Using condition of experiment, prevention of delamination can be demonstrated from the proposed analytical method.

Prevention of Delamination during Drilling of Composite Material Using Vibration

2004 ◽  
Vol 261-263 ◽  
pp. 381-386 ◽  
Author(s):  
Shigeru Aoki ◽  
Toshiyasu Nishimura
Keyword(s):  
Composite Material ◽  
Ultrasonic Vibration ◽  
Analytical Method ◽  
Low Frequency ◽  
Adhesive Layer ◽  
Experimental Results ◽  
Vibrational Load ◽  
Low Frequency Vibration ◽  
Prevention Method

Prevention method of delamination at adhesive layer during drilling of composite material using vibration is examined. First, this method is examined experimentally. As vibrational load, relatively low frequency vibration and ultrasonic vibration are used. It is concluded occurrence of delamination is less when vibration is used during drilling. Next, experimental results are examined by analytical method. Adhesive layer is assumed to be damping component. Condition of occurrence of delamination is proposed.

Investigation of Mechanical Properties of Silk and Epoxy Composite Materials

2021 ◽  
Vol 889 ◽  
pp. 27-31
Author(s):  
Norie A. Akeel ◽  
Vinod Kumar ◽  
Omar S. Zaroog
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Epoxy Composite ◽  
Mechanical Test ◽  
Weight Ratio ◽  
Industrial Applications ◽  
Sem Analysis ◽  
Equivalent Strength ◽  
Test Impact

This research Investigates the new composite materials are fabricated of two or more materials raised. The fibers material from the sources of natural recycled materials provides certain benefits above synthetic strengthening material given that very less cost, equivalent strength, less density, and the slightest discarded difficulties. In the current experiments, silk and fiber-reinforced epoxy composite material is fabricated and the mechanical properties for the composite materials are assessed. New composite materials samples with the dissimilar fiber weight ratio were made utilizing the compression Molding processes with the pressure of 150 pa at a temperature of 80 °C. All samples were exposed to the mechanical test like a tensile test, impact loading, flexural hardness, and microscopy. The performing results are the maximum stress is 33.4MPa, elastic modulus for the new composite material is 1380 MPa, and hardness value is 20.64 Hv for the material resistance to scratch, SEM analysis of the microstructure of new composite materials with different angles of layers that are more strength use in industrial applications.

Comparative Study of Mechanical and Tribological Behaviour of Thermoplast-Based Composites

2017 ◽  
pp. 78-98
Author(s):  
Kaushik Kumar ◽  
J. Paulo Davim
Keyword(s):  
Composite Material ◽  
Comparative Study ◽  
Polymer Matrix ◽  
Weight Ratio ◽  
Experimental Results ◽  
Tribological Behaviour ◽  
Environment Friendly ◽  
Short Cycle ◽  
Inorganic Fillers ◽  
Day By Day

The usage of composite material has been increasing day by day over the years due to the excellent properties being offered by them such as lower volume-to-weight ratio, improved toughness, recyclable, environment friendly and also due to their short cycle productivity, easiness in fabrication, long lasting life span etc. This work presents study of mechanical and tribological behaviour of ABS polymer matrix filled with micron-sized inorganic and Natural / Green fillers. The main purpose behind this work is to compare the performance of composites with different class of fillers. The experimental results unveil that the composite with inorganic fillers perform better than with natural based fillers.

Composite Material Selection Using Multi Criteria Decision Making for Automobile Torsion Bar

2014 ◽  
Vol 573 ◽  
pp. 649-654 ◽  
Author(s):  
V.S. Chandrasekar ◽  
K. Raja ◽  
P. Marimuthu
Keyword(s):  
Decision Making ◽  
Composite Material ◽  
Composite Materials ◽  
Material Selection ◽  
Weight Ratio ◽  
Real Data ◽  
Multi Criteria Decision Making ◽  
Preference Relations ◽  
Torsion Bar ◽  
Selection Of

Automotive components made from composite materials can result in significant weight savings over steel and Aluminum. The main purpose of this research is to study about the selection of suitable composite material for automobile torsion bar which possesses good strength to weight ratio and yield considerable weight savings. This paper involves identification of potential composite materials, selection of evaluation criteria, use of fuzzy theory to quantify criteria values under uncertainty and application of fuzzy Linguistics to evaluate and select the best material for replacing conventional steel material with composite material used in automobile torsion bar. The strength of the proposed paper is the ability to deal with uncertainty arising due to the lack of real data in material selection for replacing the conventional material.Keywords:- Composite material, Incomplete linguistic preference relations, AHP, Decision analysis, Consistent fuzzy preference relations, Multi-criteria decision making

Relationship between Electrical Parameters in Combined EDM and Surface Quality

2010 ◽  
Vol 42 ◽  
pp. 436-439 ◽  
Author(s):  
Xin Long Kang ◽  
Dong Man Yu ◽  
Hui Guo ◽  
Chang Pei Shang
Keyword(s):  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Experimental Results ◽  
Development Prospect ◽  
Electrical Parameters ◽  
Machined Surface ◽  
Process Characteristics ◽  
The Law

This paper presents a deep analysis for the effects of the principles and Electrical Parameters of ultrasonic vibration aided EDM in gas on the roughness of finish machined surface by briefly describing the principles and process characteristics of EDM and combined ultrasonic discharge machining technology, and qualitatively obtains the law of the effects of electrical parameters on the quality of machined surface from the analysis of experimental results. The comparison among the three EDM methods shows the superiority and development prospect of ultrasonic vibration aided EDM in gas.

Study of Mechanical Properties on Bi-Directional E-Glass Fiber with Epoxy Resin Multi Walled CNT Nanoсomposite

Nano Hybrids ◽  
2016 ◽  
Vol 10 ◽  
pp. 14-19 ◽  
Author(s):  
S. Nallusamy
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Glass Fiber ◽  
Wear Behavior ◽  
Weight Ratio ◽  
Industrial Applications ◽  
Filler Materials ◽  
Machine Component ◽  
Carbon Nano Tube

Now a days composite material plays an important role in many industrial applications due to their excellent mechanical properties. Presently researchers are making composite materials using various filler materials to characterize the wear behavior of the composite which is used as a machine component in various industrial applications and in machine house hold articles for daily use to highly sophisticated applications. This is due to the proven fact that composite materials acquire higher strength to weight ratio. In this investigation Nano composites of E-Glass fiber/Multi walled carbon nano tube were prepared by the technique of hand layup. The glass fiber used for current investigation is E-glass fiber bi-directional of 45 degree orientation. The composite material samples were prepared in the form of a plate with a thickness of 4 mm. The fabricated composite materials were cut into analogous profiles as per ASTM for tensile and flexural testing analysis. This investigation reveals that the growth of Multi Walled Carbon Nano Tube (MWCNT) particles improves considerably the mechanical properties even if the fabrication is done by manual method like the technique of hand layup.

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.  

Effects of Different Structure Rotors on Mixing Process and Quality of Short Fiber-Rubber Composite Material

2009 ◽  
Vol 87-88 ◽  
pp. 277-281
Author(s):  
Chuan Sheng Wang ◽  
De Wei Zhang ◽  
Hui Guang Bian
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Short Fiber ◽  
Experimental Results ◽  
Mixing Process ◽  
Mixing Performance ◽  
Rubber Composite ◽  
New Type ◽  
Better Than

The structure of rotors is an important factor, which impacts the quality of the mixed rubber. For the short fiber-rubber composite material, the structure of the rotors is most important. Through the experiments study, the mixing performances of four-wing synchronous rotor, six-wing synchronous rotor and new type of six-wing synchronous varying clearance rotor have been studied. The experimental results indicated that the mixing performance of the new type rotor is much better than the four-wing and six-wing synchronous rotor for the mixing of short fiber-rubber composite materials.

Sign in / Sign up

Export Citation Format

Share Document