Measuring and Testing Composite Materials Used in Aircraft Construction

2021 ◽  
Vol 904 ◽  
pp. 161-166
Author(s):  
Tomasz Lusiak ◽  
Andrej Novák ◽  
Michal Janovec ◽  
Martin Bugaj
Keyword(s):  
Composite Materials ◽  
Tensile Stress ◽  
Maximum Stress ◽  
Tensile Tests ◽  
Maximum Tensile Stress ◽  
Aircraft Structure ◽  
Strength Limit ◽  
Reinforced Composite ◽  
Materials Used ◽  
Composite Samples

This paper is focused on the use of special composite materials for the construction of aircraft components. It focuses on measuring and testing the strength of reinforced composite materials used in damaged aircraft parts repairs. To determine the layer required to repair a part of the aircraft, it is necessary to know the strength limit of the material and its parts. The article describes experimental measurements of manufactured composite samples that have been subjected to tensile stress. Aim of the performed tensile tests was to determine the maximum tensile stress that the composite materials are able to transmit until they are damaged. Measurement determining the maximum stress level is important to ensure the required safety of the aircraft structure on which the composite structure was repaired.

Research on the Application of Fiber-Reinforced Composite Materials on Sports Equipments

2014 ◽  
Vol 687-691 ◽  
pp. 4244-4247 ◽  
Author(s):  
Lun Li ◽  
Huang Jing
Keyword(s):  
Composite Materials ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Climbing Wall ◽  
Wall Materials ◽  
Materials Used ◽  
Equipment Performance

Composite materials help to improve the needs of all types of sports equipment performance and lightweight. In recent years, composite materials used in the race bike, a variety of bats, climbing wall materials and other aspects have made new progress. In this paper introduces the composites and the characteristic of fiber-reinforced composite materials and indicate several examples about fiber reinforced composites in sports equipment applications.

Impact of New Composite Material Technology on the Performance of the Tennis Rackets

2014 ◽  
Vol 484-485 ◽  
pp. 114-117 ◽  
Author(s):  
Guang Yi Jiang
Keyword(s):  
Composite Materials ◽  
Material Selection ◽  
Living Standards ◽  
Fiber Reinforced ◽  
Material Technology ◽  
Scientific Training ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
The Status ◽  
Materials Used

With the continues improving of people's living standards, more and more people work out in all kinds of sports fields beyond the busy work. On the other hand, the development of the modern competitive sports also requires that the sports experts should not only strive for the scientific training, but should also pay much attention on the improvement and development of the sports equipment at the same time, which makes the sports equipment market have achieved unprecedented prosperity. This paper introduces the application of the fiber reinforced composite materials in the field of sports equipment, which is described mainly from the advantages of the fiber reinforced composite materials used in sports equipment areas, and from the aspects of the principles of material selection, the product varieties, the application examples and the status.

Effects of Ultrasonic Impact Treatment on the Residual Stress and Microstructure of TA15 Welded Joint

2017 ◽  
Vol 898 ◽  
pp. 1056-1062 ◽  
Author(s):  
Guang Lu Qian ◽  
Xiao Yun Song ◽  
Wen Jun Ye ◽  
Rong Chen ◽  
Teng Ma ◽  
...  
Keyword(s):  
Residual Stress ◽  
Tensile Stress ◽  
Fusion Zone ◽  
Maximum Stress ◽  
Electron Beam Welding ◽  
Welded Joint ◽  
Maximum Tensile Stress ◽  
Residual Stress Distribution ◽  
Longitudinal Stress ◽  
Ultrasonic Impact Treatment

The effects of ultrasonic impact treatment (UIT) on the distribution of residual stress and on the microstructure of TA15 (Ti-6.5Al-2Zr-1Mo-1V) alloy joints by electron beam welding (EBW) were investigated. The results demonstrated that a marked microstructure change occurred after welding and the microstructure of welded joint presented a transitional change, i.e. martensite appeared in the fusion zone while equiaxed α in base mental. The residual stress in fusion zone was mainly tensile stress, and the maximum longitudinal stress value was 817MPa, which located in the centerline of welded joint. The results indicated that different impact methods have different influence on residual stress distribution. After employing UIT on welding toe, the residual stress near the welded joint exhibited a uniform distribution and the maximum tensile stress dropped to-153MPa. While after applying UIT on full coverage, the curve of the residual stress was steep and the maximum stress was still tensile stress. After UIT, no significant change occurred in microstructure and the tensile strength has a little change.

Effects of the alumina reinforcement ratio on the corrosion properties of iron based composite materials

2020 ◽  
Vol 62 (11) ◽  
pp. 1094-1098
Author(s):  
Kubilay Karacif
Keyword(s):  
Composite Materials ◽  
Electrochemical Corrosion ◽  
High Hardness ◽  
Operating Conditions ◽  
Reinforcement Ratio ◽  
Working Environment ◽  
Corrosion Properties ◽  
Reinforced Composite ◽  
Iron Based ◽  
Composite Samples

Abstract Iron based composite materials reinforced with various ceramic particles are used in operating conditions requiring features such as high hardness, strength and wear resistance. The composite materials may be subject to corrosion depending on the working environment. In this study, the corrosion properties of iron based composite materials produced by powder metallurgy, containing carbon and different amounts of alumina reinforcement were investigated. In the materials production, 0.5 wt.-% carbon and 1, 3 and 5 wt.-% alumina powders were added to the iron powders as reinforcement. Followed by mixing, one-way cold pressing and sintering, respectively, both iron based carbon and alumina reinforced composite samples were obtained. The electrochemical corrosion properties of iron based composite materials containing various amounts of alumina reinforcement were investigated in a 3.5 wt.-% NaCl environment and the effects of the reinforcing material ratio on the corrosion behavior of the composite material were determined. It was determined that with an increase in the alumina reinforcement ratio, the corrosion rate of the material increases and the corrosion resistance decreases.

Experimental Study on Low Temperature Mechanical Properties of HTPB Propellant

2013 ◽  
Vol 310 ◽  
pp. 124-128 ◽  
Author(s):  
Xiao Jun Zhang ◽  
Xin Long Chang ◽  
Shi Ying Zhang ◽  
Jie Tang Zhu
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Tensile Test ◽  
Room Temperature ◽  
Maximum Stress ◽  
Tensile Tests ◽  
Maximum Tensile Stress ◽  
Uniaxial Tensile ◽  
Stress Strain ◽  
Htpb Propellant

In order to investigate low temperature mechanical characteristics of HTPB (hydroxy-terminated polybutadiene binder) propellant, uniaxial tensile tests at both the low temperature and room temperature after short storage at low temperature were conducted and SEM (scanning electron microscopy) was used to observe fracture surfaces. The mechanical properties and stress-strain curves were obtained. The experimental results show that matrix tearing and particle brittle fracture occur in low temperature tensile test, but only particle/matrix interface de-wetting in room temperature tensile test. Low temperature stress-strain curves of propellant appear obviously yield region, and the yield degree is involved to the low temperature value. The low temperature mechanical properties such as maximum tensile stress, elastic modulus and strain at maximum stress against temperature are different from room temperature mechanical properties.

Experimental Research Regarding the Tensile Strength of some Reinforced Composite Materials

2015 ◽  
Vol 808 ◽  
pp. 131-136
Author(s):  
Paul Bere ◽  
Adrian Popescu ◽  
Liana Livia Hancu
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Mechanical Characteristics ◽  
Fiber Reinforced Polymer ◽  
Fibre Glass ◽  
Reinforced Composite ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Materials Used ◽  
Technical Interest

The fiber-reinforced polymer composites are of great scientific and technical interest and a very impressive development. This justifies both the development of the research in this area, and the extension of the production of such materials.This paper presents research regarding three different composite materials, plates of carbon fibre, glass fiber and Kevlar in epoxy matrix. The mechanical characteristics of plates made of composite materials (CM) reinforced are presented. Based on the results, a comparative study between the reinforced materials used to manufacture the plates of CM is carried out.

Fiber Reinforced Composite Materials in Architecture

2015 ◽  
Vol 789-790 ◽  
pp. 1171-1175
Author(s):  
Saniye Karaman Öztaş
Keyword(s):  
Composite Materials ◽  
Fiber Composite ◽  
Chemical Properties ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Technical Performance ◽  
Reinforced Composite ◽  
Materials Used

Composite materials are made from two or more constituent materials with significantly different physical or chemical properties. The materials work together to give the composite more excellent properties than its components.Fiber reinforced composite materials constitute a widely used group of the composites. There are many researches about fiber reinforced composites. This study focused on fiber reinforced composite materials used in architecture unlike other researches. It was aimed to specify the benefits of the fiber composite materials for architecture and discussed several recent developments related to these materials. A literature review was made by grouping composites materials. The study reported that more research is needed for fiber reinforced composites to improve their technical performance, environmental and economic properties.

Failure Analysis of Fiber Reinforced Composite Materials Used in Malaysian Industries

2007 ◽  
Vol 4 (2) ◽  
pp. 41
Author(s):  
Jamaluddin Mahmud ◽  
Wahyu Kuntjoro ◽  
Aidah Jumahat
Keyword(s):  
Composite Materials ◽  
Carrying Capacity ◽  
Plate Theory ◽  
Load Carrying Capacity ◽  
Reinforced Composite ◽  
Load Carrying ◽  
Actual Load ◽  
Fortran 90 ◽  
Materials Used ◽  
Discrete Layer

The main objective of this paper is to determine the curves bounding the actual load carrying capacity in terms of the First Ply Failure and the Last Ply Failure of composite materials used in Malaysian Industries. A mathematical model and computational model are presented for the analysis. Higher Order Shear Deformation plate theory is employed to predict the deformation of the plate. The selected material properties through thickness is used and accommodated by a discrete layer approach. A program based on finite element method is developed using Fortran-90 to determine the lamina stresses. These stresses are then used in the present failure model to determine the First Ply Failure and Last Ply Failure, by progressively reducing the stiffness of the laminas. Finally, the First Ply Failure and Last Ply failure results are analysed, in terms of lower and upper bound within which the true load carrying capacity lies.

scholarly journals Cooling under Applied Stress Rejuvenates Amorphous Alloys and Enhances Their Ductility

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 67
Author(s):  
Nikolai V. Priezjev
Keyword(s):  
Glass Transition ◽  
Tensile Stress ◽  
Potential Energy ◽  
Applied Stress ◽  
Three Dimensional ◽  
Tensile Tests ◽  
Maximum Tensile Stress ◽  
Amorphous Structure ◽  
Glass Transition Point ◽  
Dynamics Simulations

The effect of tensile stress applied during cooling of binary glasses on the potential energy states and mechanical properties is investigated using molecular dynamics simulations. We study the three-dimensional binary mixture that was first annealed near the glass transition temperature and then rapidly cooled under tension into the glass phase. It is found that at larger values of applied stress, the liquid glass former freezes under higher strain and its potential energy is enhanced. For a fixed cooling rate, the maximum tensile stress that can be applied during cooling is reduced upon increasing initial temperature above the glass transition point. We also show that the amorphous structure of rejuvenated glasses is characterized by an increase in the number of contacts between smaller type atoms. Furthermore, the results of tensile tests demonstrate that the elastic modulus and the peak value of the stress overshoot are reduced in glasses prepared at larger applied stresses and higher initial temperatures, thus indicating enhanced ductility. These findings might be useful for the development of processing and fabrication methods to improve plasticity of bulk metallic glasses.

scholarly journals Failure Analysis of Fiber Reinforced Composite Materials Used in Malaysian Industries

2007 ◽  
Vol 4 (2) ◽  
pp. 41
Author(s):  
Jamaluddin Mahmud ◽  
Wahyu Kuntjoro ◽  
Aidah Jumahat
Keyword(s):  
Composite Materials ◽  
Carrying Capacity ◽  
Plate Theory ◽  
Load Carrying Capacity ◽  
Reinforced Composite ◽  
Load Carrying ◽  
Actual Load ◽  
Fortran 90 ◽  
Materials Used ◽  
Discrete Layer

The main objective of this paper is to determine the curves bounding the actual load carrying capacity in terms of the First Ply Failure and the Last Ply Failure of composite materials used in Malaysian Industries. A mathematical model and computational model are presented for the analysis. Higher Order Shear Deformation plate theory is employed to predict the deformation of the plate. The selected material properties through thickness is used and accommodated by a discrete layer approach. A program based on finite element method is developed using Fortran-90 to determine the lamina stresses. These stresses are then used in the present failure model to determine the First Ply Failure and Last Ply Failure, by progressively reducing the stiffness of the laminas. Finally, the First Ply Failure and Last Ply failure results are analysed, in terms of lower and upper bound within which the true load carrying capacity lies.

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