sustainable technology 1

8/10/2019 Sustainable Technology 1

1/14

Universityof

Wolverhampton

Ya3h.r Khatib

Shahidi

SurtrinableTechnology

'

ET1004

Component Elemont

-Chalr

[odule Tutor:G Oak$, Dr

K Yahlaoul


2/14

Introduction

o

report:

ln designing

product,

afty,

rgonomic spects f

product

ndother spects

suchas lexibility,durabilitymustbconsidered.

Themaingoalof thisprojects to design ndmost mportantlyelect roper

matorlala uitableor a 5 ls chalr n erms

f

Physlca

ndMschanica.

In this

project

ypes

of

structuralmatefialswhichhave

he strength o resist

deformationavebeen hosen nd rom

hese

ssumptionsaluesor

material

properties

nd aclor l safety avebeenobtained.


3/14

Leg section

properties:

-.

:

-r

P

Scondmoment f area l) about {A

=

6a600mm1

Numbr f chair gs s 5

L6nthof oach Eg rorn

whel

supporto cntr of vorlical8upports 320

mm

Diameter

f

slnglecentral uppodmembrs 28mm

D6ign Loed or chair

8 lqrcN


4/14

Materialpropertyconsideration

OneofThemost mportantactors

n selecting aterial

sed

n

chair s

F.O.S

Factors

f

Safety).

MaterialStrenoth

f,/m

,

)

Factors

tSafetv

- . ,

Working tress

ym,

)

lf Mateialstrength Working tr$s Then

t willnotbreak

lf Material trength Working tress hen t

willbreak

Strsngih s heability f E materialo resist eformation.hestrength f a

component

chair

egs) s usually onsidered

ased n hemaximumoad

(1000N)

anbe borne eforeailures apparont.

Lllt of mebrlalsand holr

propeitles

u3sd n ch.lr:

1. Gompressivetress

Design oad

=

1000N

Number f chair egs

=

5

1

Reaction

f force n endof each eg

=

F

x 1000

200N

Diameterf single entral upportmemier s

28mm

Compressivetresss at 13mm rom opsurface

o NutralAxis

Picture

)

Itet3rlal

Young tlodulu3E

()/m,

)

Ultlmats

Strsngth

)/mr

)

iletrl

tron

2'l'l x

'l'e

350x 106

Brass

90

x 10r

250

106

Aluminum

90x 10'o 200 106

Stesl

207 x 1Al

'1860

10

Pla tlcr

Nylon

24 x 10' 75

x 106

Rubber

0.01-0.1

10'q

'15

106

Polypropylene

80 x 103

Polystyrene

3-3.6

1o'g

60 x 103


5/14

compi3llv3tres "=i

*p

=

..',j#*,u

=l.$MYm,

Factor

fEabtyorho"

=

#*$

=

214.72

t

willnot reak

FactorfsafotyorBra""

=

ffi{$

=

153.37t will ot

rsak

Factor

fsaftyorAlumlnum

ffii$

=

122.7

t willnot reak

Factorof

afctyfortm'=

iH#S

=

1141.1twitl

ot reak

FactorfsafstyorNVron

ffi

=

e6.Ol

t witt of reek

Factor fsafetyorRuuo.r

=

,Jf# -:

=

9.2

t

wittnotbreak

Factor t satetyorPoly3tyrene

##

=

36.8t willnotbrak

Factor fsafety

or

Polypropyl.ne

ff$

=

49

oa willnotbIak

.

Compressivetresshappens n the main

centralverticalsuppofimember

(Picture

).


6/14

2. Bending tress

M

=

200N

0.32m 64Nm

Secondmomnt f ar6a aboutNA

=

54500mm'

,=+-

= .- +f##

-

stazxlr.Ym,Maximumrcssnmmpr66ion

A4Nm 0.022m

-

6,26,lO'

/^,

Maximum

irssnbrBion

5.45 0{m'

Bcnding

treEs

appn8

t tha

po8ltion

horhe ag

oins

hs main

sntral

supportmembor

picturs

).

I

:

al


7/14

Factor t safeiy or Maximumtress

n

compression:

Factorf ssfetyor ro"

-

##

=23.02t willnotbreak

Factor fsafetyorBra""

=

#H*lc

=

16.45t willnotbreak

Factor fsafetyorAtumtnum

a'rt:rtJ#.

=

13.16t witt otbreak

Factor

fsafety

or

gt".r

=

ffiS

=

122.37t willnot

break

Factor tsafetyorNyron

offi

=

4.93 t willnotbreak

FactorfsafetyorRuOO",

-

of;ffi

=0.98t wlllbBak

Fac'torf

safety

orPolystyrene

o:#h

-

3.95t will ot

break

FactorfsafetyorPolypropylono

j$]l

oo

=

s.zo twillnot

reak

Factorof 3afety or iilaxlmum troa n t3nslon:

Factor fsafetyor ron

50

t-19'

=

13,46

twiltnotbreak

Factor f sfety

or

Bo""

=

;::#:

=

e.61t willnot

break

Fector fsafetyorAlumlnum

2 9I{

=769

11*llnotbreak

Factor fsafetyor8t".1=

##S

=

71.53ltwill ot

break

Factor f6afety

orNV,on

ffi

=

2.88 t willnot

break

Factor fsafetyorRu5b7= 1L19"- =0.58t will brcak

Factor

fsafety

orPolystyrene

ffft

=

Z Sr t willnot

break

Facrorf saftyorPolypropylene

-99

-10"=

3

96x *ll not

break


8/14

3. Singleshearstress

It s

assumedhat he

diameter f connection

in

which onnects heelso egs

is

gmm.

Single shrar 3ii 33 h.pp.m .t thre positions:

1. Where

he eg

oim

the main entral

upportmember

Picture

)

2. Where

endof the

eg

oins

o wheels

Picture

)

3.

\Mere

single entral upport

mmbor

oins

o

top

ot thc

chair

Picture

)

l. Where hs lgg

Jol;3

ho malncentrat upport mombor

Plcturo

)

From

picture

1 the areaof the

leg

sectioncan be calculated:

A

=

(0.049

0.003) 3 x

(0.032

0.003) 0,00043sm'?

F=':"=2ooN

o

r

=

I

=

zw

=

4597701= 9.45

MN/

"

A 0.000435

/m'

Fectorfsafetyor ron

=

ffi=

zeO.87t

willnot reak

Factor f

saiety

orBra""

=

ffi=

*.48 lt will

notbreak

Fac-torf

saiety

orAluminum

ffi=

ouo.tt

twitt ot

break


9/14

Factorof

safety

or

St".r

=

] 60

t f

{

=

+043.47 t witt not

break

FactortsatetyorNr,on

ffi

=

63.04

t witl otbreak

FactorfsafetyorRrUU", ffi =32.6'lt willnot reak

Factorf

safety

orPolystyrano

gffi

=-

SO.aSlwillnot

reak

Factorfsafetyor

polypropylene

ffift

=rzS.Sr

t will otbreak

2. Whero

6ndot tha og

olru

to whee|s

Plcture

)

Diameterf theDin s assumed

mm.

F 2OO

t=-=-

A z x 0.0045'

=31aMV

"

m'

Factorfsafetyor ron

=

ffi=

I r r.46

t witt ot reak

Factor

f safetyorBra "

=

ffi;S

=

79.62t

wiltnotbreak

Factorfsafetyor

Alumlnum

H#i=

ua

'*

ritl not

reak

FactorfsafetyorSt""r

=

a,,qffi

=

S92.35twitt ot reak

Factor

fsafetyorNvron

ffi

=

23.08t

will otbreak

Factorf

sEfety

or

RulUer

ffi

=

4.78t will ot

break

FactorfsafetyorPoly3tyren.

##

=

19. t wilt otbrak

Factor

f safetyorPolypropylene

;10#$

=

ZS.+etwillnolbreak


10/14

3.

Whsre

singlocntralsupportmombef

oins

to top of

th6 chair

Picture

)

Thickness

s assumed .5mm.

l0


11/14

Crlculrtlon ot aEr:

ThE

areaot the dgs

s

squal o the arsa of E rchnglewith englh6 21

and

width f 2.5mm.

Sinl t le : l ' reur s

i r

c:,s

' .rc

1., o

1,

tha hotcl rsd cr. ,q

Ata 2x 3.14 0.0140.00250.000219Er

.=F=

looo

,

=

+s4MN/.

A 2.2x'l0'

/m'

Factor f

ailty

for hon

=

4 t t 0l

=

77 1 ti

willnotbrsak

Fac-tort safetyor 863

= ?s

xl ''=

=

55. t wittnot

break

Factor

fBaftyur

Alumlnum

ffi

=

*.Ou n *ll not

beak

Factor fsairty orEbet

= l 4

t 14

=

4oe

n

wi

notbraak

Factorfsabty r Nt *

=

#F.

t6.52t will

otbrsak

Frc{or

fslbg

for

Polyrtyranr

ffi

=

f S.Zf t willnot

brclk

Fector

f

sefctyorRuUt =

ffi=3.3ltwill

not reak

Factor frafatyorPolypropyLn.

]H#

=

17.62

i willnotbrcak

l l


12/14

is

gmm.

F 2OO

'

2A 2xzx0.0(X5'?

4. Double hearstress

It

is

assumedhat he

diameter f connection

in

which onnects heelso egs

=.1.57MN/

"

m'

Double hear tress

appens

t

pin

connector herewheels

oin

egs

PictuE

).

Factor fsafetyor rcti

=

#ii$

=

222.et willnotbreak

Fac,torfsafety

orBto"

=

#-*S

=

159.23

t willnotbreak

Factorf

saiety

orAlumlnum

#*S

=

127.38t will ot

break

Factorfsafetyor

gtaol

###

=

1184.71t

/vlll

ot reak

Factor

fsaiety

or

Nfron

=

ffi

=

47.77t

will

notbreak

FaclorfsafetyorRubb",

#fr

=

9.55t will ot

break

Factor fsafetyorPolystyFno

#fr

=

38.22t willnot

breEk

FactorfsaiotyorPolypropyl.neffi

=

SO.9St willnotbfeak

l2


13/14

touble Eh-bor^ t .es hn pr)er iE

(whe.p

pnd

of

ih( ' leg

. . to

s

to

wheel5)

Enown Ir

p

crurP

Conclusion and recommendatlons:

Them.in

purpc.

of hb

proj.c-t

|r to find

prcp.r

mrbri.ls b bc rppli.d in

dlrir by indlng

aclor f

sabtybr

difi.Ilnt

mebdals. homebdalsucfi

aa

lron,Bra3s,

luminum, bol,

Rubbcr,

Mon,

Polystylnc

rd Polypropylen

vr ru nvrclig.bd nd thconlymabdalnot uitrbl. torahairs

Rubb.r. Bcau8

h b.ndlng3t3s

tomlb

t os)

Rubbr

d

n g

would reek.

Ohalre$ canbc meds rom ronbutb swid ino|Basinghohcavincasl tho

chtlr

t

woridb.

rocommcndadhEi

$o drair

L$

to be m.dc fnom

hslic

(exc.pt

Rubbor) nd hemaln sntr l vertcalsuppo msmbr

canb. madr iom

sbcl rnd o&cr mabl .

l3


14/14

References

nd Bibliography

htto:/mvw.enoineerinotoolbox.com/vouno-modulus-d

17.html

htto://ohvsics.r,r'6tout.

du/stabtr/Sf noth/

htto://en.wikipdia.oro/wiki/lron

htto:/m,w.anoinee6doe.com/materiEl

cience/strenoth.htm

http://homepaoes.which.nev-oaul.hills/Materials/MaterialsBodv.

tml

htlo:rlrww.ms6.cornell.6du/coursevenoril'1modulus.htm

htto://n.wikipedia.oro/wiki/Stvrofoam

htlD:/fu/ww.noineeGdoe.com/mechanica

aterialmenu.shtrnl

ffiutus

htto://en.wikio6dia.oro/wiki/Tensile

trenoth

MaxA. Rix Mechanicalcisncs

page

7

E.J.HeamMedranicsf Mabrials

page

95

l4

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