Researches Regarding the Compression of the Films Polymers in Composite System

2020 ◽  
Vol 57 (1) ◽  
pp. 112-121
Author(s):  
Elena Valentina Stoian
Keyword(s):  
Composite Material ◽  
Iron Powder ◽  
Modulus Of Elasticity ◽  
Polymer Matrix Composites ◽  
Polymer Composite Material ◽  
Thin Layers ◽  
Matrix Composites ◽  
Silicon Iron ◽  
Average Modulus ◽  
Metallic Mesh

This paper presents experimental research results obtained from testing the compression of polymer matrix composites. The four types are analyzed by thin layers of polymer composite material of various thicknesses were subjected to the test of mechanical compression. The analyzed samples were obtained by reinforcing the siloxane rubber with FeSi powder and stretching the mixture on the metallic mesh (PM), as well as stretching the simple siloxane rubber, without reinforcing agent on the metallic mesh. The mathematical modeling of the experimental results obtained on the LFM 30kN compression tester, Walter & Sai AG was performed using the Excel program. Establishment of material was based on regression analysis performed later. The modulus of elasticity of the samples was determined according to the deformation range 0.1 ÷ 0.3%, corresponding to the maximum correlation coefficient resulting from the regression of the experimental data. Following the compression analyzes it was found that in the case of simple siloxane rubber (S) without filling, the average modulus of elasticity decreases from 80 MPa to 39 MPa for the siloxane rubber laying on the metallic mesh. For the composite material (siloxane rubber with FeSi powder addition) noted SF, the value of the module is 81, and in the case of the laying composite (siloxane rubber reinforced with silicon iron powder filler on the metallic mesh, noted PMSF), the value of the module decreases to 31 MPa. We conclude that the addition of silicon iron powder leads to an increase in the elasticity of the siloxane rubber, and its reinforcement with the metallic mesh leads to a decrease in the elasticity modulus of the siloxane rubber, as well as of the siloxane rubber reinforced with the iron powder.

Implementation of a tabulated failure model into a generalized composite material model

2018 ◽  
Vol 52 (25) ◽  
pp. 3445-3460 ◽  
Author(s):  
Robert K Goldberg ◽  
Kelly S Carney ◽  
Paul DuBois ◽  
Canio Hoffarth ◽  
Bilal Khaled ◽  
...  
Keyword(s):  
Composite Material ◽  
Polymer Matrix Composites ◽  
Damage Model ◽  
Failure Surface ◽  
Material Model ◽  
Yield Function ◽  
Matrix Composites ◽  
Failure Model ◽  
Mathematical Functions ◽  
Damage And Failure

The need for accurate material models to simulate the deformation, damage, and failure of polymer matrix composites under impact conditions is becoming critical as these materials are gaining increased use in the aerospace and automotive communities. To attempt to improve the predictive capability of composite impact simulations, a next generation material model is being developed for incorporation within the commercial transient dynamic finite element code LS-DYNA. The material model, which incorporates plasticity, damage, and failure, utilizes experimentally based tabulated input to define the evolution of plasticity and damage and the initiation of failure as opposed to specifying discrete input parameters such as modulus and strength. The plasticity portion of the composite constitutive model is based on an extension of the Tsai-Wu composite failure model into a generalized yield function. For the damage model, a strain equivalent formulation is used to allow for the uncoupling of the deformation and damage analyses. For the failure model, a tabulated approach is utilized in which a stress- or strain-based invariant is defined as a function of the location of the current stress state in stress space to define the initiation of failure. Failure surfaces can be defined with any arbitrary shape, unlike traditional failure models where the mathematical functions used to define the failure surface impose a specific shape on the failure surface. In the current paper, the complete development of the failure model is described and the generation of a tabulated failure surface for a representative composite material is discussed.

scholarly journals EFFECTS OF STRAIN RATE AND TEMPERATURE ON THE MECHANICAL PROPERTIES OF GFRP COMPOSITES

2011 ◽  
Vol 10 (1-2) ◽  
pp. 03 ◽  
Author(s):  
J. L. V. Coelho ◽  
J. M. L. Reis
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Strain Rate ◽  
Elevated Temperatures ◽  
Mechanical Response ◽  
Polymer Matrix Composites ◽  
Glass Fibers ◽  
Research Data ◽  
Matrix Composites ◽  
Gfrp Composites

In this work, the mechanical response of a composite material based on glass fibers embedded in an epoxy resin was experimentally studied as a function of strain rate and temperature. It was shown that for the temperature range from 23 to 100 °C the elastic properties of the composite are significant affected and the strain rate influences only the ultimate strength. The experimental research data and the approaches presented in this work should significantly extend our knowledge of the effect of elevated temperatures on the mechanical behavior of high temperature polymer matrix composites.

The Effect of Filler Content on the Mechanical Properties of Polymer Composite

2016 ◽  
Vol 858 ◽  
pp. 190-195
Author(s):  
Lenka Markovičová ◽  
Viera Zatkalíková
Keyword(s):  
Composite Material ◽  
Polymer Matrix ◽  
Filler Content ◽  
Polymer Matrix Composites ◽  
Ceramic Matrix Composites ◽  
Hardness Test ◽  
Carbon Matrix ◽  
Organic Matrix ◽  
Matrix Composites ◽  
The Matrix

A composite material is a macroscopic combination of two or more distinct materials, having a recognizable interface between them. Modern composite materials are usually optimized to achieve a particular balance of properties for a given range of applications. Composites are commonly classified at two distinct levels. The first level of classification is usually made with respect to the matrix constituent. The major composite classes include organic – matrix composites (OMC's), metal – matrix composites (MMC's), and ceramic – matrix composites (CMC's). The OMC's is generally assumed to include two classes of composites: polymer – matrix composites (PMC's) and carbon – matrix composites [1]. The composite material used in the work belongs to the PMC's and the composite is formed by the polymer matrix - high density polyethylene. As filler was used hard-magnetic strontium ferrite. Composite samples were prepared with different filler content (0%, 60%, 70%, 80%). Testing of polymer composites included: tensile test, elongation at break, impact test, hardness test.

scholarly journals Characterization of Wear Properties of Epoxy - SiC - Alumina Filled Polymer Matrix Composites

2019 ◽  
pp. 163-170
Author(s):  
Mohammed Asif Kattimani ◽  
D. H. Pachchinavar ◽  
Bhimanagouda Patil
Keyword(s):  
Composite Material ◽  
Polymer Matrix Composites ◽  
Resin Composite ◽  
Wear Testing ◽  
Dry Sliding Wear ◽  
Matrix Composites ◽  
Wear Properties ◽  
Epoxy Resin Composite ◽  
Pin On Disc ◽  
Taguchi’S Design Of Experiments

Nowadays, Polymer composites are frequently used for engineering applications such as aerospace, automotive and marine industries. The present research is on evaluation of wear properties of epoxy resin composite fabricated using alumina (Al2O3) in 5wt% and Silicon Carbide (SiC) in 5-15 wt% in steps of 5 wt% as fillers for testing purpose. The tribological properties such as dry sliding wear characteristics have been evaluated by conducting wear tests using Pin-on-Disc wear testing setup for sliding speed (200/300/400 rpm) and sliding load (20/30/40 N). The wear properties are analyzed using Taguchi’s Design of Experiments and Analysis of Variance (ANOVA) techniques. From the statistical analysis it is found that the 15wt% of SiC is major factor influencing the wear resistance of the composite material. Finally regression analysis has been carried out to build regression model to predict the wear rate of the composite material under different sliding conditions.

scholarly journals Computational Modeling of Polymer Matrix Composites

2018 ◽  
Author(s):  
DC Pham
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Polymer Matrix ◽  
Composite Structures ◽  
Computational Models ◽  
Polymer Matrix Composites ◽  
Failure Criteria ◽  
Matrix Composites ◽  
Stiffness Reduction

Applications of polymer matrix composites are growing in aerospace and offshore industries due to the light-weight and good mechanical properties of composite materials. The design of composite materials can be made at macroscopic level in which the composite mechanical properties can be tailored to offer the most desired performance of composite structures. Understanding on mechanical behavior of the composite material may require detailed investigations at the microscopic level involving the behaviour of the composite constituents such as the fiber, the polymer matrix and the fiber/matrix interface under macroscopic loads. Composite failure criteria are often employed to evaluate the failure of composite material and its constituents. Computational damage models can be then developed to reflect the stiffness reduction of the material once damage at the macro- and micro- scales of the composite is indicated. The successful prediction of composite structures relies on consistent computational models which can capture the mechanical behaviour of composite materials at different length scales.

Composite Materials Based on Silicone Rubber Used to Mitigation Electromagnetic Pollution

2015 ◽  
Vol 1114 ◽  
pp. 76-80
Author(s):  
Elena Valentina Stoian ◽  
Vasile Bratu ◽  
Florina Violeta Anghelina ◽  
Ileana Nicoleta Popescu
Keyword(s):  
Composite Materials ◽  
Silicone Rubber ◽  
Electromagnetic Waves ◽  
Polymer Matrix Composites ◽  
Raw Materials ◽  
Digital Processing ◽  
Thin Layers ◽  
Matrix Composites ◽  
High Attenuation ◽  
Electromagnetic Pollution

Rapid developments in telecommunications and digital processing of information are facing the problem of electromagnetic wave pollution and interference. The aim of this article is the characterization at microwave frequencies of composite materials based on silicone rubber. These materials contain 80% siloxane rubber and only 20% powdery feeling like nanocarbon and pyrite cinder. To achieve these objectives were reviewed and selected raw materials and characteristics were determined in a structural material, the electromagnetic attenuation as well as electrically, by making measurements of electrical conductivity of thin layers of polymer matrix composites produced by the doctor blade technique. Starting from sample siloxane rubber, i.e. without additives or filler reinforcement in compression analysis we find that reinforcing agents leads to increased values of the modulus of elasticity in especially for pyrite ashes. For materials analyzed in this paper, measurements were made in the frequency range between (1-18) GHz and have found high attenuation over 45 dB in the case of composite materials with pyrite ash filler. So we can say that this materials can used for shielding against electromagnetic waves in order to protect the human factor. The novelty of the paper consists in the compositions of the specimens and their mechanical and electromagnetic characteristics.

Development of a Composite Material Based on Polymers Polydimethylsiloxane and Polytetrafluoroethylene Use in Human Prosthetic Coatings

2020 ◽  
Vol 834 ◽  
pp. 177-182
Author(s):  
Ritha Chicaiza ◽  
Caterine Donoso ◽  
Francisco Quiroz
Keyword(s):  
Tensile Strength ◽  
Composite Material ◽  
Human Skin ◽  
Modulus Of Elasticity ◽  
The Other ◽  
Cross Linking ◽  
Mass Ratio ◽  
Main Layer ◽  
Average Tensile Strength ◽  
Average Modulus

The purpose of this study is the development of a composite material composed of a main layer of polydimethylsiloxane (PDMS) and a reinforcement of polytetrafluoroethylene (PTFE), to be used later in human prosthesis coatings. A mass ratio of the main layer consisting of PDMS:Tetraethyl orthosilicate (TEOS):Di-n-butyl tin dilaurate (DBTL) in the range of 33:1:0.5; 25:1:0.5; 10:1:0.5, and the mass ratio of the composite material (PTFE:PDMS) with a range was evaluated of 1:9; 1:1; 2:3. Obtaining the following results: Tensile strength of 0.085 MPa based on the ratio of 33:1:0.5 - 1:9 and 0.59 MPa with respect to the ratio of 10:1:0.5 - 2:3, evidencing an increase in tensile strength by decreasing the weight of PDMS and increasing the weight of PTFE. On the other hand, the composite material obtained is hydrophobic, insoluble in ethanol and water, has a cross-linking percentage of 98.74 % and 99.66 % respectively, also has a minimum permeance of 5.24x10-7 (g Pa-1 s-1 m-2). With which it is concluded that the treatment whose properties resemble the human skin is the combination 10:1:0.5 - 1:1 that allowed to obtain an average tensile strength of 0.66 MPa, average modulus of elasticity of 6.56 MPa, similar to the dermis of a 43 year old person.

scholarly journals INVESTIGATION OF MECHANICAL BEHAVIOR OF POLYMERIC FOAM MATERIALS REINFORCED BY OIL PALM EMPTY FRUIT BUNCHES (OPEFB) FIBERS DUE TO STATIC AND DYNAMIC LOADS

2019 ◽  
Vol 3 (1) ◽  
pp. 10
Author(s):  
Achmad Jusuf Zulfikar ◽  
Bobby Umroh ◽  
Muhammad Yusuf Rahmansyah Siahaan
Keyword(s):  
Composite Material ◽  
Mechanical Behavior ◽  
Modulus Of Elasticity ◽  
Impact Test ◽  
Unsaturated Polyester ◽  
Polymeric Composite ◽  
Polymer Composite Material ◽  
Empty Fruit Bunches ◽  
The Matrix ◽  
Manufacturing Techniques

Polymeric composite foam with EFB fiber reinforced is new material that can be utilized as an alternative engineering material. EFB fiber utilization becomes the center of subject in this research. Moreover, these composites are unique with the presence of cavities (foam) in the matrix of unsaturated polyester resin. It results a decrease in density of the material that formed, and obtain a thermoset polymer composite material lighter than any else similar type. The objective of this study is to obtain the best manufacturing techniques of composite material, the mechanical behavior of these materials due to tensile static loading and high strain rate impact, and the distribution of foam that occur in the material that formed as a result of blowing agent (BA) from the type of polyurethane (PU). In this research, the sample formed into standard specimen of testing, such as ASTM D638 for static tensile test, and impact test specimen. Mechanical’s behaviors that are obtained in this research are density, tensile strength, modulus of elasticity (E), the incident stress, and dynamic modulus of elasticity of the material. For static testing was performed according to standard ASTM D638 tensile and impact test using the Kolsky’s method. To know the distribution of foam that occur in the material, were observed using Scanning Electron Microscope instrument (SEM). To determine the stress distribution in this material, then conducted a computer simulation using Ansys. The best result obtained by the composition of this material based on material composition, which resin consumption can be reduced by the presence of BA as well as mechanical strength, good enough for molding. The best composition in this study will be used in subsequent studies, namely the design and manufacture of traffic cones from this material.

scholarly journals Composites With Rubber Matrix And Ferrimagnetic Filling

2019 ◽  
Vol 1 (1) ◽  
pp. 776-781
Author(s):  
Lenka Markovičová ◽  
Viera Zatkalíková
Keyword(s):  
Composite Material ◽  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Ceramic Matrix Composites ◽  
Hardness Test ◽  
Carbon Matrix ◽  
Organic Matrix ◽  
Rubber Matrix ◽  
Matrix Composites ◽  
The Matrix

AbstractA composite material is a macroscopic combination of two or more distinct materials, having a recognizable interface between them. Modern composite materials are usually optimized to achieve a particular balance of properties for a given range of applications. Composites are commonly classified at two distinct levels. The first level of classification is usually made with respect to the matrix constituent. The major composite classes include organic – matrix composites (OMC's), metal – matrix composites (MMC's), and ceramic – matrix composites (CMC's). The OMC's is generally assumed to include two classes of composites: polymer – matrix composites (PMC's) and carbon – matrix composites (Peters, 1998). The composite material used in the work belongs to the PMC's and the composite is formed by the polymer matrix – rubber (sidewall mixture). As filler was used hard-magnetic strontium ferrite. Composite samples were prepared with different filler content (20%, 30%, 40%, 50%). Testing of polymer composites included: tensile test, elongation at break, hardness test and study of morphology.

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