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TENSILE TEST ANALYSIS OFNATURAL FIBER REINFORCED

COMPOSITE

PRESENTED BY

D.VADIVEL

Final Year M.E Aeronautical EngineeringEr.perumal Manimekalai College

HOSUR


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ABSTRACT

This Paper mainly deals with analysis of tensileproperties of Palmyra fiber Reinforced EpoxyComposite that is suitable for automobile application.First, the property of material was obtained on thebasis of some assumptions (i.e., Rule of Mixture) andwas modeled with reference to ASTM D638.Here the simulation was carried out on specimenunder different fiber volume fraction and fiber length.The present work includes the Analysis of Palmyra

Fiber Reinforced Epoxy Composites using FEA withvarious fiber volume fractions and these results werevalidated with the experimental results.


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INTRODUCTION

The main advantage of using the composite conceptin structural components lies in the high stiffness andstrength to weight ratios.In order to use these materials in differentapplications, the knowledge of their static properties isessential.The development of their use in real serviceconditions requires additional information on their

dynamic properties and durability.In the literature, a significant number of studiesconcerning the fatigue of composite materials werereported.


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CAR PARTS

Door panels

Exterior bodyparts

Car Hood

Front bumpers andfenders

Various interiorparts


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MATERIAL SELECTION


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METHODOLOGY

FEA modeling of Natural fiber reinforced polymer composites using Palmyra fibers andresin for different volume fraction.Tensile strength of (ASTM) modeled specimenis obtained by using ANSYS.Then the FEA results and experimental resultsare to be compared.


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ASTM SPECIMEN (D638)


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DIMENSIONS


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PROPERTIES OF MATERIAL


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MODEL SPECIMEN D638


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MESHING MODEL


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SOLUTION


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GENERAL POST PROCESSOR


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STRESS DISTRIBUTIONS ONCOMPOSITE PLATE


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STRAIN DISTRIBUTIONS ONCOMPOSITE PLATE


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ANSYS RESULT FOR TREATEDFIBER

Fiber length

(treated fiber)

Load N strain Stress

(N/ sq.mm)

Displacement (mm)

3 mm

1618.2 0.185 25.519 12.773

1667.2 0.190 25.982 13.158

5 mm

1618.16 0.417 23.247 14.578

1882.94 0.189 26.921 13.169

2059.47 0.182 25.943 12.659


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ANSYS RESULT FOR UNTREATEDFIBER

Fiber length

(untreated fiber)


(N/ sq.mm)

Displacement (mm)

3 mm

1304.33 0.192 25.961 13.010

1529.89 0.193 30.450 13.479

5 mm

1500.47 0.193 23.31 13.478

1765.26 0.184 22.219 12.794

1500.47 0.193 23.31 13.478


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STANDARD SPECIMEN


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TENSOMETER (TENSILE TEST MACHINE)


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RESULT FOR UNTREATEDFIBER

Fiber length

(untreated fiber)


(N/ sq.mm)

Displacement (mm)

3 mm

1304.33 0.151 16.5 7.552

1529.89 0.144 19.23 7.198

5 mm

1500.47 0.159 19.11 7.954

1765.26 0.142 22.16 7.113

1500.47 0.113 18.69 6.680


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TABLE 10.1 ERROR PERCENTAGEOF STRAIN (UNTREATED FIBER)

Fiber length

(untreated fiber)

Experimental strain Analytical strain % of error

3 mm

0.151 0.192 21.4

0.144 0.193 25.4

5 mm

0.159 0.193 17.7

0.142 0.184 22.9

0.113 0.153 26.14


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TABLE 10.2 ERROR PERCENTAGEOF STRESS (UNTREATED FIBER)

Fiber length

(untreated fiber)

Experimental stress Analytical stress % of error

3 mm

16.5 21.961 24.86

19.13 25.450 24.8

5 mm

19.23 23.31 14.6

22.16 22.29 5.84

18.69 23.31 19.09


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ERROR PERCENTAGE OFSTRAIN (TREATED FIBER)

Fiber length

(treated fiber)

Experimental strain Analytical strain % of error

3 mm

0.129 0.185 30.27

0.126 0.190 33.6

5 mm

0.436 0.417 4.35

0.152 0.189 19.57

0.159 0.182 12.6


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ERROR PERCENTAGE OFSTRESS (TREATED FIBER)

Fiber length

(treated fiber)

Experimental stress Analytical stress % of error

3 mm

20.9 25.519 18.10

20.64 25.982 20.5

5 mm

20.34 23.247 12.50

23.84 26.921 11.44

26.24 25.943 1.131


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CONCLUSIONThe exploration of mechanical properties of natural fiber

reinforced composite was done by using analytical methodand experimental method.This project mainly focuses on tensile strength of Palmyranature fiber composite. The ASTM (D638) specimens wereused to done the tensile test.The experimental results were compared with the analyticalresult and error percentage was determined.From the comparison tables it was proved that the tensile testfor the composite ASTM can be done with the guide ofAnsys software itself with less error percentage.This project work facility the research for doing their tensiletest analysis for various fiber and resin with the help of

procedure derived in this project work.


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SCOPE FOR FUTURE WORK

This study leaves wide scope for future investigations. It can be extended to newer composites using otherreinforcing phases and the resulting experimental findingscan be similarly analyzed.Many other aspects of this problem like effect of fiberorientation, weight fraction of ceramic fillers on wearresponse of such composites require further investigation.Statistical validation has been enhanced to ResponseSurface Methodology.Compressive testing can be done for the ASTM specimensin Ansys software.The error percentage can be minimized by improvingconvergence technicques in Ansys.


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THANK YOU

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