7/25/2019 Lab Report # 4 by Group 3

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LAB REPORTEngineering polymers & composites materials

Presented to: Dr. Mohsin Ali Raza

Submitted by:

Group No. 3

Arslan zahid E11-306

Rehan Abar Butt E11-30! Ansir "ahm##d E11-3$0

Ahsan %a&ed E11-3$'

"unam Siddi(ue E11-3$6

"#hsin Ali )ahid E11-3*$

MEA!!"RG# & MAER$A!% ENG$NEER$NG

'!!EGE '( ENG$NEER$NG & EMERG$NG E)N'!G$E%

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A$M

T# determine the +#ll#,in .r#.erties by tensile testin #+ i&en .#lymeri/ materials Te+l#n and

PE

12 Elasti/ "#dulus /

$2 4ield strenth 5+r#m ra.h

32 Tensile strenth 5+r#m ra.h

*2 7ra/ture strenth 5+r#m ra.h'2 8 t#tal el#nati#n 10095l+- l#l#

62 8 elasti/ el#nati#n 10095ly - l#l#

;2 8 .lasti/ el#nati#n 10095l+- lyly

!2 T#uhness resilien/e 5y$$E < .lasti/ +ra/ture t#uhness

0

f

+d

PR$N$P!E

The basi/ .rin/i.le #+ this e=.eriment is t# a..ly l#ad #n .#lymer s.e/imen usin >nstr#n 10*6

5Table m#del .lasti/ testin ma/hine until the s.e/imen +ra/ture2 A//#rdin t# ma/hine ra.h

data stress strain /ur&e ,as .l#tted and usin this stress strain /ur&e re(uired .r#.erties are

determined2

Apparatus &Material Re*uired

>nstr#n 10*6 5Table m#del .lasti/ testin ma/hine? Te+l#n? PE s.e/imen? @ernier /alli.er?

ra.h .a.er

'+ser,ation & calculation o- e-lon specimen

Tensile test #+ Te+l#n ,as n#t /#m.leted be/ause its +ra/ture ,as n#t #//ur2

Result

Te+l#n sh#,s m#re than 3'0 8 el#nati#n and its +ra/ture ,as n#t #//ur thats ,hy ,e /ant

dra, its stress-strain /ur&e and als# n#t /al/ulated its .r#.erties2

'+ser,ation & calculation o- )DPE specimen

"ani+i/ati#n ! times

Oriinal lenth 52L2 C2C;' /m

7ra/ture Lenth 57inal lenth 112$* /m

Didth 02**' /m

Thi/ness 021 /m

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Area 5lenth5,idth 5C2C;'502**' *2*3!!; /m$

a+le stress strain Data o- )DPE specimen

Extension Force Strain Stress

(Force/Area)

5/m 5 5/m$

0 0 0 00.2 18 0.02005 4.055082

0.2 36 0.02005 8.110163

0.4 54 0.0401 12.16524

1 86.4 0.1003 19.46439

1.4 106 0.14035 23.87992

2 126 0.2005 28.38557

2.7 144 0.27067 32.44065

3 152 0.30075 34.24291

3.4 162 0.3408 36.49573

4 176.4 0.401 39.7398

4.3 181 0.4311 40.7761

5 190 0.50125 42.80364

5.8 198 0.58145 44.6059

6.6 200 0.6617 45.05646

7 200 0.7018 45.05646

7.4 200 0.7419 45.05646

7.7 198 0.77193 44.6059

Graph )DPE

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

0

10

20

30

40

50

HDPE Stress-Strain Curve

Strain

Stress

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Results

Elasti/ "#dulus Stress Strain

123 Pa 4ield Strenth

A//#rdin t# ra.h yield strenth is $!2; "Pa

Tensile Strenth

As the ma=imum stress ,hi/h PP s.e/imen bear be+#re .lasti/ de+#rmati#n $C"Pa s#

this is its tensile strenth2

7ra/ture strenth

*' /m$

8 t#tal el#nati#n +r#m ra.h

138

8 elasti/ el#nati#n +r#m ra.h C218

8 .lasti/ el#nati#n +r#m ra.h

139.1

32C8 T#uhness

$2'; Pa

Discussion

>n b#th #+ these s.e/imens Te+l#n sh#,s &ery hih el#nati#n and in e=.eriment +ra/ture ,as n#t

#//ur? this sh#,s that it has &ery hih du/tility this miht be due t# the start #+ #rientati#n #+ the

m#le/ules #+ Te+l#n in stru/ture2 PE sh#,s m#re elasti/ beha&i#ur and its .lasti/ de+#rmati#n

rei#n ,as small sh#,in that alth#uh it ,as a du/tile material but its du/tility is less2

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