An acoustical investigation of partial perforation in jute fiber composite panel

2020 ◽  
Author(s):  
L. Yuvaraj ◽  
S. Jeyanthi ◽  
A. Yogananda
Keyword(s):  
Fiber Composite ◽  
Composite Panel ◽  
Jute Fiber

scholarly journals Characterization and ballistic performance of thin pre-damaged resin-starved aramid-fiber composite panels

2021 ◽  
pp. 004051752110134
Author(s):  
Cerise A Edwards ◽  
Stephen L Ogin ◽  
David A Jesson ◽  
Matthew Oldfield ◽  
Rebecca L Livesey ◽  
...  
Keyword(s):  
Fiber Composite ◽  
Plane Deformation ◽  
Ballistic Impact ◽  
Image Correlation ◽  
Composite Panel ◽  
Composite Panels ◽  
Micro Computed Tomography ◽  
Ballistic Performance ◽  
Low Level ◽  
Out Of Plane

Military personnel use protective armor systems that are frequently exposed to low-level damage, such as non-ballistic impact, wear-and-tear from everyday use, and damage during storage of equipment. The extent to which such low-level pre-damage could affect the performance of an armor system is unknown. In this work, low-level pre-damage has been introduced into a Kevlar/phenolic resin-starved composite panel using tensile loading. The tensile stress–strain behavior of this eight-layer material has been investigated and has been found to have two distinct regions; these have been understood in terms of the microstructure and damage within the composite panels investigated using micro-computed tomography and digital image correlation. Ballistic testing carried out on pristine (control) and pre-damaged panels did not indicate any difference in the V50 ballistic performance. However, an indication of a difference in response to ballistic impact was observed; the area of maximal local out-of-plane deformation for the pre-damaged panels was found to be twice that of the control panels, and the global out-of-plane deformation across the panel was also larger.

Hybridization effect on mechanical properties of short basalt/jute fiber-reinforced polyester composites

2013 ◽  
Vol 20 (4) ◽  
pp. 343-350 ◽  
Author(s):  
Pandian Amuthakkannan ◽  
Vairavan Manikandan ◽  
Jebbas Thangaiah Winowlin Jappes ◽  
Marimuthu Uthayakumar
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Hybrid Composites ◽  
Fiber Composite ◽  
Testing Machine ◽  
Basalt Fiber ◽  
Jute Fiber ◽  
Computer Assisted ◽  
Fiber Reinforced ◽  
Polyester Composites

AbstractMechanical properties of fiber reinforcement that can be obtained by the introduction of basalt fibers in jute fiber-reinforced polyester composites have been analyzed experimentally. Basalt/jute fiber-reinforced hybrid polymer composites were fabricated with a varying fiber percentage by using compression molding techniques. The fabricated composite plates were subjected to mechanical testing to estimate tensile strength, flexural strength and impact strength of the composites. The effect of fiber content on basalt/jute fiber in the composites has been studied. Addition of jute fiber into basalt fiber composite makes it a cost-effective one. Incorporation of basalt fiber into the composites was at approximately 10%, 20%, up to 90%, and the jute fiber percentage was reduced from 90%, 80%, to 10% correspondingly. Mechanical properties were investigated as per ASTM standards. Tensile and flexural strengths were tested by using a computer-assisted universal testing machine, and impact strength by using an Izod impact tester. It has been observed that the addition of jute fiber to the basalt fiber polyester composites enhanced the mechanical properties. Water absorption of hybrid composites was also analyzed and was found to be proportional to fiber percentage.

scholarly journals Thermal and Mechanical properties of epoxy-jute fiber composite

2014 ◽  
Vol 27 (2) ◽  
pp. 77-82 ◽  
Author(s):  
H Ahmad ◽  
MA Islam ◽  
MF Uddin
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Tensile Strength ◽  
Fiber Length ◽  
Epoxy Composite ◽  
Fiber Composite ◽  
Young Modulus ◽  
Fiber Content ◽  
Jute Fiber ◽  
Elongation At Break

Chopped jute fiber-epoxy composites with varying fiber length (2-12 mm) and mass fraction (0.05-0.35) had been prepared by a heat press unit. The cross-linked product was characterized in terms of specific gravity, thermal conductivity, tensile strength, Young modulus and elongation at break. The transverse thermal conductivities for randomly oriented fibers in the composite were investigated by Lees and Charlton’s method. The tensile strength, Young modulus and elongation at break were investigated by a Universal Tensile Tester. With an increase in the fiber content (irrespective of the fiber length), the thermal conductivity of the composite decreases; the decreasing rate being highest for the fiber length of 2 mm followed by that for the fiber length of 6 and 12 mm. The decreasing rate of the thermal conductivity of the jute-epoxy composite is comparatively higher to that reported in literature for acrylic polymer hemp fiber composite. The tensile strength also decreases with the increase of the fiber content in the composite. The fiber length does not show to have significant effect on the tensile strength of the composite; the variation in strength being masked within experimental error. The Young modulus increases with the increase of fiber content within elastic limit; showing the highest values for the fiber length of 6 mm followed by those for the fiber length of 2 mm and 12 mm. The elongation at break shows slightly increasing trend up to 15% fiber content, but beyond that it decreases drastically. The specific gravity decreases with the increase in the fiber content and thus the recalculated specific tensile strength is found to keep at a stable level of 36MPa up to the fiber content of 20%, and beyond that the specific tensile strength decreases with the increase in the fiber content. It is concluded that jute fiber-epoxy composite could be used as a good heat-insulating material. Further investigation is recommended on the improvement of the thermal insulation keeping the mechanical properties unchanged or even improved. The TGA study is also required to ascertain the field of application of the material. DOI: http://dx.doi.org/10.3329/jce.v27i2.17807 Journal of Chemical Engineering, IEB Vol. ChE. 27, No. 2, December 2012: 77-82

scholarly journals Experimental Examination of Chemical Resistance behavior of Jute Fiber Composite

2019 ◽  
Vol 8 (4S2) ◽  
pp. 289-290
Keyword(s):  
Chemical Resistance ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Fiber Reinforcement ◽  
Jute Fiber ◽  
Jute Fibers ◽  
Resistance Property ◽  
Polyester Composite ◽  
Polyester Matrix ◽  
Positive Results

This paper investigates the chemical treated fiber reinforcement effect on the chemical resistance behavior of natural fiber reinforced polyester composite. A composite material was developed with jute fiber reinforcement in the polyester matrix. Jute fiber is reinforced in three different forms namely untreated, NaOH treated and Silane treated jute fibers. The chemical resistance property of the composite was investigated as per the ASTM standard. Six different chemicals were used to investigate the chemical resistance behavior of the composite. The chemical resistance property was increased with addition of treated jute fiber. All the tested composites exhibited positive results on the chemical resistance test.

scholarly journals Investigating and Optimizing the Process Variables Related to the Tensile Properties of Short Jute Fiber Reinforced with Polypropylene Composite Board

2012 ◽  
Vol 7 (4) ◽  
pp. 155892501200700 ◽  
Author(s):  
Saravanan Kannappan ◽  
Bhaarathi Dhurai
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Fiber Composite ◽  
Tensile Tests ◽  
Tensile Failure ◽  
Jute Fiber ◽  
Effect Of Temperature ◽  
Composite Board ◽  
Predicted Values ◽  
Experimental Pressure

The effect of temperature, pressure, and time on the tensile strength of jute fiber composite has been studied. The process of preparing the composite specimens is discussed. The best tensile properties were observed if the composite board is manufactured using high pressure and moderate temperature. For tensile strength, the time does not play a significant role. The study identifies the principal experimental pressure variables, which have the greatest effect on the tensile strength of the composite. The composite boards were subjected to tensile tests and the fractured surfaces were observed under SEM. The SEM photomicrographs of the fractured surfaces of the composite board show diverse extents of fiber pull-outs under tensile failure. The tensile strength values are in good concurrence with predicted values and were found have a correlation coefficient of 96%.

Effects of Layup and Matrix Toughness on Modeling Notched Carbon Fiber Panels in Out-of-Plane Bending

2015 ◽  
Author(s):  
Levi J. Suryan ◽  
Mitchell A. Daniels ◽  
John P. Parmigiani
Keyword(s):  
Finite Element ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Maximum Load ◽  
Fiber Composites ◽  
Composite Panel ◽  
Damage Propagation ◽  
Damage Progression ◽  
Out Of Plane ◽  
Plane Bending

Predicting the damage progression behavior of fiber composites using finite element methods is an ongoing challenge in design of high performance structures. A common application of fiber composites is out-of-plane bending of a notched composite panel. This loading occurs, for example, in an aircraft fuselage near reinforcing members such as ribs or stringers. The material parameters used by the finite element package Abaqus that dictate damage progression behavior of fiber composites include 6 strength values which control when damage is initiated, and 4 energy parameters that control how damage propagates. The values of the initiation parameters (strengths) are often accurately known, however the values of the propagation parameters (energies) are often not accurately known. The consequences of these inaccuracies are not consistent. Current research indicates that accurate FEA results for out-of-plane bending always require accurate values for the material strengths. However the effect of inaccurate material propagation energy values can vary depending on composite laminate layup. Understanding how these effects vary and which values are important can help a designer select a material and/or determine which propagation energy values need to be accurately determined. This study uses the Abaqus implicit FEA solver to model center notched carbon fiber panels to explore the effect of ply orientation on the sensitivity of maximum load to values of matrix tensile propagation energy and matrix compressive propagation energy. Preliminary studies of this loading scenario showed that these values have significant effects on maximum load only for certain layups. Five different 20 ply layups were chosen for this study with varying number of plies oriented in the 90 degree direction. The 90 degree direction is defined as perpendicular to the bending stresses and parallel to the notch. For each layup, matrix compressive and tensile propagation energies were specified at ±20% from their nominal values to create two-level factorials. Each layup was also run using nominal values as a center point to assess linearity of the effects. Furthermore, damage propagation paths were compared to understand how damage propagation was being affected. This way, nonlinear effects of matrix propagation energy values on maximum load could be separated from any regime changes in damage propagation. The results of this study lend understanding to the finite element analyst on how layup affects the need for high-accuracy values of certain material properties. Accurate FEA results for some layups do not depend on accurate matrix propagation energy values. Having this in mind can save significant resources in the fiber composite design process by eliminating unnecessary destructive tests to determine material property values accurately.

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