scholarly journals Wear Study On Al-B4C Composite Material

2020 ◽  
Vol 3 (10) ◽  
pp. 56-58
Author(s):  
N. Pavan ◽  
Jaysaheel I. Harti ◽  
K. S. Harishanand
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Operating Conditions ◽  
The Other ◽  
Wear Behaviour ◽  
Economical Aspect ◽  
Engineering Materials ◽  
Materials Used ◽  
Commercial Applications

There are various types of engineering materials used in both commercial as well as non-commercial applications, it becomes important to think about the life of the material, to prove about the economical aspect of the material. In order to increase the life, the conventional engineering materials fails in one or the other aspects. So the arrival of composite materials is important, which shows better mechanical properties than the regular engineering materials with lower weights. A study on the wear behaviour of a composite material (Al-B4C), under varying concentration of the reinforcement is made to understand the material usability under the cyclic operating conditions.

scholarly journals Acoustic Emission and K-S Metric Entropy as Methods for Determining Mechanical Properties of Composite Materials

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 145
Author(s):  
Lesław Kyzioł ◽  
Katarzyna Panasiuk ◽  
Grzegorz Hajdukiewicz ◽  
Krzysztof Dudzik
Keyword(s):  
Mechanical Properties ◽  
Acoustic Emission ◽  
Composite Material ◽  
Composite Materials ◽  
Testing Machine ◽  
Measurement Data ◽  
Entropy Method ◽  
Displacement Sensor ◽  
Metric Entropy ◽  
Plastic Phase

Due to the unique properties of polymer composites, these materials are used in many industries, including shipbuilding (hulls of boats, yachts, motorboats, cutters, ship and cooling doors, pontoons and floats, torpedo tubes and missiles, protective shields, antenna masts, radar shields, and antennas, etc.). Modern measurement methods and tools allow to determine the properties of the composite material, already during its design. The article presents the use of the method of acoustic emission and Kolmogorov-Sinai (K-S) metric entropy to determine the mechanical properties of composites. The tested materials were polyester-glass laminate without additives and with a 10% content of polyester-glass waste. The changes taking place in the composite material during loading were visualized using a piezoelectric sensor used in the acoustic emission method. Thanks to the analysis of the RMS parameter (root mean square of the acoustic emission signal), it is possible to determine the range of stresses at which significant changes occur in the material in terms of its use as a construction material. In the K-S entropy method, an important measuring tool is the extensometer, namely the displacement sensor built into it. The results obtained during the static tensile test with the use of an extensometer allow them to be used to calculate the K-S metric entropy. Many materials, including composite materials, do not have a yield point. In principle, there are no methods for determining the transition of a material from elastic to plastic phase. The authors showed that, with the use of a modern testing machine and very high-quality instrumentation to record measurement data using the Kolmogorov-Sinai (K-S) metric entropy method and the acoustic emission (AE) method, it is possible to determine the material transition from elastic to plastic phase. Determining the yield strength of composite materials is extremely important information when designing a structure.

Study on Mechanical Properties of the Composite Materials Film by Speckle Projection Method

2012 ◽  
Vol 496 ◽  
pp. 281-284
Author(s):  
Wen Wen Liu ◽  
Zhi Wang ◽  
Yun Hai Du ◽  
Xian Zhong Xu ◽  
Da Quan Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Projection Method ◽  
Dynamic Deformation ◽  
Calibration Method ◽  
Deformation Measurement ◽  
Lens Distortion

An improved accurate speckle projection method is used for study the mechanical properties of the composite material film in the paper. A system for deformation measurement is developed with the telecentric lenses, in which such conventional lens’ disadvantages such as lens distortion and perspective error will be diminished. Experiments are performed to validate the availability and reliability of the calibration method. The system can also be used to measure the dynamic deformation and then results are also given.

scholarly journals Tension mechanical properties of recycled glass-epoxy composite material

2012 ◽  
pp. 189-198 ◽  
Author(s):  
Jelena Petrovic ◽  
Darko Ljubic ◽  
Marina Stamenovic ◽  
Ivana Dimic ◽  
Slavisa Putic
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Composite Material ◽  
Composite Materials ◽  
Modulus Of Elasticity ◽  
Epoxy Composite ◽  
Raw Materials ◽  
Mechanical Tests ◽  
Recycled Glass ◽  
Before And After

The significance of composite materials and their applications are mainly due to their good properties. This imposes the need for their recycling, thus extending their lifetime. Once used composite material will be disposed as a waste at the end of it service life. After recycling, this kind of waste can be used as raw materials for the production of same material, which raises their applicability. This indicates a great importance of recycling as a method of the renowal of composite materials. This study represents a contribution to the field of mechanical properties of the recycled composite materials. The tension mechanical properties (tensile strength and modulus of elasticity) of once used and disposed glass-epoxy composite material were compared before and after the recycling. The obtained results from mechanical tests confirmed that the applied recycling method was suitable for glass-epoxy composite materials. In respect to the tensile strength and modulus of elasticity it can be further assessed the possibility of use of recycled glass-epoxy composite materials.

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.

Tailoring Composite Materials Through Optimal Selection of Their Constituents

1992 ◽  
Vol 114 (3) ◽  
pp. 451-458 ◽  
Author(s):  
H. M. Karandikar ◽  
F. Mistree
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Multiobjective Optimization ◽  
Material Selection ◽  
The Other ◽  
Economic Factors ◽  
Optimal Selection ◽  
Structural Applications ◽  
Design Requirements ◽  
Selection Of

The use of composite materials has provided designers with increased opportunities for tailoring structures and materials to meet load requirements and changing and demanding environments. This has led to their increased use in structural applications. As with traditional materials the selection of an appropriate material for a design is important. In case of design using composite materials the selection of a material consists of selecting a fiber-resin combination which meets all design requirements. This involves choosing the fiber, the resin, and the proportion of these two constituents in the composite material. The phrase “material selection” refers to the problem of laminate selection. This corresponds to the task of choosing a fiber and resin combination based on technical and economic factors. Materials tailoring, on the other hand, involves manipulating the composition of the composite material to achieve desired properties and it is the selection of a fiber and resin simultaneously but separately. In this paper we present, through an example, a multiobjective optimization-based method for assisting a designer in tailoring composite materials for specific technical and economic objectives.

Improving Properties of Rubberized Mortar with Polyacrylamide

2014 ◽  
Vol 528 ◽  
pp. 77-82
Author(s):  
Chun Ku Lu ◽  
Cheng Haw Lee ◽  
I Feng Wang
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Effective Means ◽  
Crumb Rubber ◽  
Corrosion Property ◽  
Sem Images ◽  
Waste Tire ◽  
Compressive And Flexural Strengths ◽  
Commercial Applications ◽  
Rubberized Mortar

The waste tire can be added to concrete to form a composite material, known as “Rubcrete”. However, addition of crumb rubber leads to degradation of physical properties of the concrete. In this study, by treating the crumb rubber with Polyacrylamide (PAM), we have improved properties of the rubberized mortar. Specifically, the compressive and flexural strengths of the specimen at 56 days were improved up to 19% and 27%, respectively. Dramatically, the anti-corrosion property of this new rubberized mortar is much superior to that of the original mortar. The addition of rubber also turned crack from fragility crack to ductility crack. To show the impacts of PAM modification, the specimens of rubberized mortar with and without PAM modification, were observed with SEM images. Experimental results showed that PAM treatment of crumb rubber is an effective means to improve the mechanical properties of the rubberized mortar; lends itself to possible commercial applications.

Influence of the Dimensions of the Mesh of the Fiber Grid Reinforcement of Composite Materials

2013 ◽  
Vol 550 ◽  
pp. 9-16
Author(s):  
Kamal Ait Tahar ◽  
R. Bahar
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Experimental Analysis ◽  
Weibull Modulus ◽  
Polyester Resin ◽  
Dynamic Test ◽  
Technical Aspect ◽  
Metal Fiber ◽  
Grid Reinforcement

Currently, the composite materials make important great strides, considering their high mechanical properties. The studies relating to the conceptual, technical aspect and modeling of their mechanical behavior are more than desirable. The mechanical properties of the composite material depend on several factors as the nature of fibers, the fiber/matrix ratio, compatibility, homogeneity... In this study, we present the results of an experimental analysis of the behavior of the composite material, under a static and a dynamic loading. The composite material is composed respectively of the glass and metal fiber reinforcement. A various dimensions of the mesh are considering. The resin used is polyester Resow 55 E. The dynamic test ( Knoop test) is carried out on various specimens made up of an polyester resin RESOW 55 E reinforced with varied powder nature. It makes it possible to measure the hardness of composite materials. The analysis of the results shows clearly that the mechanical properties are strongly influenced by the dimensions of the elementary mesh of the fiber grid reinforcement. Based on experimental results, a Weibull modulus has been established for each specimen.

Research on Composite Materials Used for Brake Shoes Manufacture

2016 ◽  
Vol 254 ◽  
pp. 207-211 ◽  
Author(s):  
Erika Popa ◽  
Liviu Pascu ◽  
Ana Socalici ◽  
Marius Ardelean
Keyword(s):  
Composite Material ◽  
Cast Iron ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Contact Zone ◽  
Laboratory Experiments ◽  
Rolling Stock ◽  
Brake Shoe ◽  
Materials Used

The paper relates laboratory experiments in order to obtain a composite material used for brake shoe manufacture. Regarding the testing materials were processed 38 samples. The percentage and composition of materials are: 15-45% novolac, 1,5-10% hexametyltetramin, 0-8% sulfur, 0-15% carbon fiber, 0-20% graphite, 0-25% aluminum, 15-28% brass and 0-40% rubber. The evolution of tribological and temperature parameters were analyzed in the contact zone tribological testing disk - split pin method. The composite material has the role to replace the classic material (cast iron) used in brake shoes composition in order to reduce the noise caused by rolling stock.

scholarly journals Laboratory studies of heated Bulk Fill composite in the tooth cavity during filling of teeth with carious defects

2021 ◽  
Vol 19 (4) ◽  
pp. 293-298
Author(s):  
V. A. Kriventseva ◽  
Y. B. Vorobieva ◽  
V. V. Nikitenko
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Room Temperature ◽  
Laboratory Studies ◽  
Marginal Fit ◽  
Military Medical Academy ◽  
Medical Academy ◽  
Hard Tissues ◽  
The Russian Federation ◽  
Materials Used

Aim. To study with the help of a microscope the marginal fit of Bulk-Fill group composite materials to the hard tissues of the tooth. Optimize the method of heating the composite in the cavity.Materials and methods. The marginal fit of the composite material of the Bulk-Fill group, sealed in 30 teeth of chewing anatomical and functional accessories extracted according to various indications, was studied. Materials used in the laboratory experiment: 3M ESPE Filtek posterior restorative Bulk Fill, SDR (Dentsply Sirona), Sonic Fill (Kerr). According to the manufacturers, the materials are used with the method of single-portion sealing. The research was conducted at the Department of General Dentistry of the S.M.Kirov Military Medical Academy of the Ministry of Defense of the Russian Federation.Results. 30 teeth extracted according to various indications of chewing anatomical and functional accessories were indicators were shown by the Sonic Fill (Kerr) system, due to heating and changing the viscosity of the material.Conclusions. It was proved in the laboratory that the heated composites of the Bulk-Fill group had the best edge fit during sealing than composites at normal room temperature. A nozzle was developed for heating the composite in the tooth cavity (priority application No. 2021120658 dated 12.07.2021). 

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