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.  

Investigation of Mechanical Properties of Nano Sized Clay/LDH Particle as Hybrid Nano Composite Material

2015 ◽  
Vol 766-767 ◽  
pp. 355-361
Author(s):  
S. Sivasaravanan ◽  
V.K. Bupesh Raja ◽  
S. Prabhu ◽  
S. Dineshkumar ◽  
Gokulaprasad
Keyword(s):  
Composite Material ◽  
Testing Machine ◽  
Weight Ratio ◽  
High Strength ◽  
Sem Analysis ◽  
Bending Test ◽  
Flexural Property ◽  
Weight Percentage ◽  
Three Point Bending ◽  
Sonication Technique

Usage of Hybrid nanocomposite materials provides a greater opportunity to replace the conventional materials due to their properties such as light weight and high strength to based on weight ratio. In this synergitic study, nanosized clay particle and layered double hydroxide particles are used. nanoclay and LDH particles were mixed on the bases of weight percentage (1wt% to 5wt%) by ultra sonication technique. The composite material was fabricated by one of the most common method known as hand lay-up technique. The composite materials was prepared in the form of plate with 4mm of thickness.The characterization of tensile and flexural property of the nanoclay, LDH and combination of both was analysis by tensile test using universal testing machine and three point bending test respectively. The tensile and three point bending test specimens were cut to size as per ASTM standard.The morphology of composite was studied using SEM analysis.

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.

Impact of the Harsh Environment on E-Glass Epoxy Composite

2019 ◽  
Author(s):  
Amir Hussain Idrisi ◽  
Abdel-Hamid Ismail Mourad ◽  
Beckry Abdel-Magid ◽  
Mohammad Mozumder ◽  
Yaser Afifi
Keyword(s):  
High Temperature ◽  
Composite Materials ◽  
Oil And Gas ◽  
Epoxy Composite ◽  
Uv Light ◽  
Weight Ratio ◽  
High Strength ◽  
Industrial Applications ◽  
Harsh Environment ◽  
Sustained Loads

Abstract Composite materials are being used in many industrial applications such as automobile, aerospace, marine, oil and gas industries due to their high strength to weight ratio. The long-term effect of sustained loads and environmental factors that include exposure to UV light, temperature, and moisture have been under investigation by many researchers. The major objective of this study is to evaluate the effects of harsh environment (e.g. seawater and high temperature) on the structural properties of E-glass epoxy composite materials. These effects were studied in terms of seawater absorption, permeation of salt and contaminants, chemical and physical bonds at the interface and degradation in mechanical properties. Samples were immersed in seawater at room temperature (23°C), 65°C and 90°C for the duration of 6 months. Results show that seawater absorption increased with immersion time at 23°C and 65°C, whereas the weight of the specimens decreased at 90°C. The moisture causes swelling at 23°C and 65°C and breakdown of chemical bonds between fiber and matrix at 90°C. It is observed that high temperature accelerates the degradation of the E-glass epoxy composite. At 90°C, the tensile strength of E-glass epoxy sharply decreased by 72.92% but no significant change was observed in modulus of elasticity of the composite.

Stress Distribution Behavior of Spherical Plain Bearing Fabricated by TiAl-Based Composite Materials Based on the Finite Element Analysis

2014 ◽  
Vol 1061-1062 ◽  
pp. 649-652
Author(s):  
Jing Wang ◽  
Li Ying Yang ◽  
Shou Ren Wang ◽  
Guang Ji Xue ◽  
Chang Xiu Zhou
Keyword(s):  
Finite Element ◽  
Composite Material ◽  
Composite Materials ◽  
Bearing Steel ◽  
Plain Bearing ◽  
Element Analysis ◽  
Specific Strength ◽  
Finite Element Software ◽  
The Finite Element Analysis ◽  
Spherical Plain Bearing

Spherical plain bearing is a sliding bearing have a spherical contact surface,it can bear larger load and automatically adjusted to the self-alignin. TiAl-based composite material is a material that be used to lightweight spherical plain bearing. The Simulation used the finite element software Ansys for the bearing’s static analysis.The material of outer ring using normal bearing steel, one group used the TiAl-based composite materials as the material of the inner ring, Another group the inner ring material is bearing steel 9Cr18. The law of the stress and strain produced by the two groups is consistent,the deformation of the composite materials is bigger under the same load, its elasticity modulus and density is smaller compared to the ordinary bearing steel,the composite material has the advantages of high specific strength especially in the occasions have strict requirements of the bearing weight.

scholarly journals STRENGTH PREDICTION OF DIFFERENT ORIENTATION UNIDIRECTIONAL GLASS FIBER LAP JOINTS

2012 ◽  
pp. 278-282
Author(s):  
R. SANTOSH ◽  
B. KIRAN
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Glass Fiber ◽  
Structural Design ◽  
Software Package ◽  
Weight Ratio ◽  
High Strength ◽  
Lap Joints ◽  
Suitable Alternative ◽  
Robot Systems

Composite materials have made way to various fields, including aerospace structures, underwater vehicles, automobiles and robot systems. Due to the high strength to weight ratio of composites, they serve as a suitable alternative to metals, therefore making the need for a reliable database of structural design more important. Most of the modern civilian and military aircraft use composite materials for their primary structural components (in addition to metals). One of the key areas in composite structural design involves the tensile strength of joints. In the present work, the lap joints fabricated from different orientations of GFRP (Glass fiber reinforced polymer) specimens are subjected to tensile test. The effect of fibre orientation on the tensile strength of lap joint is investigated both experimentally and computationally using conventional software package. The experimental results are compared with FEA using conventional software package ANSYS.

scholarly journals Manufacturing of Aluminum Alloy 6061 Composite Material using Bagasse Ash- Working Paper

2021 ◽  
Author(s):  
Subodh Salunkhe ◽  
Balasaheb Gandhare ◽  
Swanand Kulkarni
Keyword(s):  
Composite Material ◽  
Matrix Material ◽  
Weight Ratio ◽  
High Strength ◽  
Stir Casting ◽  
Al Alloy ◽  
Wear Properties ◽  
Aluminum Composite ◽  
Al 6061 ◽  
Working Paper

Aluminium (Al) is existing in a very large quantity found in the earth’s crust and third most abundant element. Al is easily available, it has a high strength to weight ratio and it is durable. Al alloy is light weight and corrosion resistant hence used in aircraft and automobile industries. Wear is loss of material from surfaces and the life of material decreases due to wear. Al 6061 has good mechanical properties, it exhibits good weldability and it has wear resistant properties. In the literature review, information about wear resistance properties of composites containing Al 6061 as a matrix is studied for different reinforcement materials for various applications. Very few researchers studied Al 6061 is a matrix material and bagasse ash as reinforced materials. In this paper, aluminum composite material manufacturing using the stir casting method is carried out for manufacturing because of flexibility, simplicity, and having mass production capability. The problem identification about improving the wear properties of Al 6061 matrix material reinforced bagasse ash has been explored and further, research objective and methodology for the same is discussed with flowcharts. The work carried still to date is reported in this working paper.

Validation of Macroscopic Forming Simulations of a Unidirectional Pre-Impregnated Material through Optical Measurements

2013 ◽  
Vol 554-557 ◽  
pp. 465-471 ◽  
Author(s):  
Alexane Margossian ◽  
François Dumont ◽  
Uwe Beier
Keyword(s):  
Finite Element ◽  
Carbon Fibre ◽  
Weight Ratio ◽  
High Strength ◽  
Element Model ◽  
Optical Measurements ◽  
Woven Fabric ◽  
Measuring System ◽  
Finite Element Software ◽  
Carbon Fibre Reinforced Plastic

Presenting interesting aspects such as a high strength-to-weight ratio, Carbon Fibre Reinforced Plastic components are frequently used in the aerospace industry. The forming step, which conforms the reinforcement to a specific geometry, is a sensitive phase of the manufacturing process. In order to detect the occurrence of defects prior to any trial, forming methods are often simulated via finite element software. The presented work will detail the simulation validation of a double curved helicopter frame forming out of a unidirectional carbon fibre pre-impregnated material (M21E, Hexcel®). The finite element model was based on an explicit approach at a macroscopic level and developed via the commercially available software Visual-Crash PAM (ESI®) [1]. The validation was carried out on six different preforms. Measurements of the top layers were performed by an enhanced version of a 4D measuring system, originally developed for non-woven fabric [2], able to make reproducible photographic and height measurements (Fig. 1). Experimental results were then compared to simulated ones. Due to material specificities, the photo quality reached for non-crimp fabrics could not be achieved [2]. After hardware and software modifications, measurements and analyses were eventually successfully completed. The validation of the simulation reached an accuracy of 1° to 3° depending on the geometrical features of the preform (Fig. 2).

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

Design and Analysis of Automotive Multi-Leaf Springs Using Composite Materials

2013 ◽  
Vol 372 ◽  
pp. 533-537 ◽  
Author(s):  
N. Suprith ◽  
K. Annamalai ◽  
C.D. Naiju ◽  
Arjun Mahadevan
Keyword(s):  
Finite Element ◽  
Composite Materials ◽  
Commercial Vehicle ◽  
Weight Ratio ◽  
High Strength ◽  
Commercial Vehicles ◽  
Finite Element Approach ◽  
Leaf Springs ◽  
Element Approach ◽  
Solid Works

One of the oldest suspension components that are still in use, especially in commercial vehicles, is leaf springs. Due to high strength to weight ratio, the automobile industries have shown interest in replacing steel springs with composite leaf springs. This work is carried out on multi leaf springs having nine leaves, used in commercial vehicle. A Finite element approach for analysis of a multi leaf springs using ANSYS software is carried out. The model is generated using solid works and imported in ANSYS. The material of the leaf springs is 65Si7 (SUP9), composite leaf springs and hybrid leaf springs. Fatigue analysis of leaf springs is carried out for steel leaf springs, and Static analysis for steel leaf springs, composite leaf springs and hybrid leaf springs.

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.

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