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Members of group
JUAN HONORI CHURA
JHON PILCOMAMANI CAXI
ANGEL QUISPE JIMENEZ
ALFREDO MAMANI PERCA
MATERIAL
PROPERTIES
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OVER WIELL
This property is most commonly usedmaterials when the materials areexposed to a force of traction andcompression, we see also nowled!eof the properties of the materialsused is of fundamental importance inen!ineerin!" The imperfect nowled!e
of the possi#ilities and limitations ofmaterials can chan!e si!ni$cantly, #utdid not return to the ori!inal %is wayis the elasticity"
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A. Tensile
stren!th anddeformation
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TE&SILE STRE&'T% A&(
(E)ORMATIO& When materials are exposed to forces, such as
tension (stretching forces ) and compression(crushing forces ), the deform! that is, the
change shape. "he tpe of deformation depends on the tpe of
force that is applied.
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A #od is su#$ected to compression if the appliedforces tend to crush it.
*ompressio
n
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Extensi%n or elongation
"his is called extension or elon!ation.
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&.! Elasticityand
plasticity
+" ELASTI*I(A( - PLASTI*I(A(
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ELASTI*IT-
ELASTI*ALL-(E)ORME(
Ru##er is an example of a'er elastic material! itcan #e
It is a considera#lede!ree"
If a material has 'er loelasticit, and is strong,engineers sa it is sti.
)RA*T.RES
(#rea*s, due to tension)'er easil. +lass is anexample of a #rittlematerial.
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PLASTI*IT-
A material that can #eplastically deformed #hammering or rolling.
MALLEA+LE
A material that can #edran out (stretched).
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*" STA'ES I& ELASTI* A&(
PLASTI* (E)ORMATIO&
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PROPORTIO&AL
LIMIT O)
PROPORTIO&ALIT-
to the increase in tension
&eond this point, length#egins to increase at aslightl greater rate thantension.
ELASTI* LIMIT&eond this point, the #arill no longer return to itsoriginal length.
For example, when tension increases by10%, length increases by 10%.
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-IEL( POI&T
.LTIMATE TE&SILE
STRE&'T% /.TS0
&eond this point, awaist (a narroer
section))RA*T.RE POI&T here the #ar #rea*s in
to.
Once it yields, it continues toincrease in length, e'en ithout afurther Increase in tension.
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1" compression compresi2n
3" tension 4 tension
5" deform 4 deformar , deforma#le
6" extension 4 extensi2n
7" tensile stren!th 4 resistencia a la tracci2n
8O*A+.LAR-
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1" compression
3" tension 4
5" deform 4
6" extension 4
7" tensile stren!th 4
8O*A+.LAR-
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LET9S PRA*TI*EPART A4
1:"1 *omplete the sentences usin! the words in the #ox" -ou
will need to use one word twice" Loo at A opposite to help you" compression deformation elon!ation extension tensi2n A stretching force is called /////// Tension.0 A crushing force is called /////// *ompression.1 Extension is also called /////// Elon!ation.2 "ension causes /// Elon!ation or Extension3 "ension or compression cause ./// (eformation // .
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LET9S PRA*TI*EPART A4
1:"1 *omplete the sentences usin! the words in the #ox" -ou
will need to use one word twice" Loo at A opposite to help you" compression deformation elon!ation extension tensi2n A stretching force is called ......... .............. .0 A crushing force is called .................. .1 Extension is also called ..... ................ .2 "ension causes ................... or .........................3 "ension or compression cause ................................ .
7/26/2019 Exposicion Material Propertiesgrupo.b
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1" Elasticity Elasticidad
3" Elastic 4 El;stica
5" +rittle 4 )r;!il
6" )racturas 4 )racturas
7" Plastic 4 Pl;stico
<" Plasticity 4 Plasticidad
=" Plastically deformed 4 (eformada pl;sticamente
:" Mallea#le 4 Malea#le
8O*A+.LAR-
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1" Elasticity
3" Elastic 4
5" +rittle 4
6" )racturas 4
7" Plastic 4
<" Plasticity 4
=" Plastically deformed 4
:" Mallea#le 4
8O*A+.LAR-
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LET9S PRA*TI*EPART +4
1 :"3 Match the two parts to mae correct sentences" Loo at +
and * opposite to help you"
If a material is sti44444444444444./*00 If a material is #rittle4444444444444./+01 If a material is plastic4444444444444/A02 If a material ields44444444444444./)0
3 If a material fractures444444444444.../E05 If a material is elasticall deformed444444./(0 a.! it is mallea#le and6or ductile.#.! it has lo elasticit and lo tensile strength.c.! it has lo elasticit and high tensile strength.d.! it has #een extended to a point #efore its elastic limit.e.! it has #een loaded #eond its ultimate tensile strength.f.! it has #een signi7cantl plasticall deformed, #ut not #ro*en.
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LET9S PRA*TI*EPART +4
1 :"3 Match the two parts to mae correct sentences" Loo at +
and * opposite to help you"
If a material is sti 0 If a material is #rittle1 If a material is plastic2 If a material ields3 If a material fractures5 If a material is elasticall deformed a.! it is mallea#le and6or ductile.#.! it has lo elasticit and lo tensile strength.c.! it has lo elasticit and high tensile strength.d.! it has #een extended to a point #efore its elastic limit.e.! it has #een loaded #eond its ultimate tensile strength.f.! it has #een signi7cantl plasticall deformed, #ut not #ro*en.
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1" Proportional 4 Proporcional
3" Limit 4 L>mite
5" Proportionality 4 Proporcionalidad
6" Elastic limit 4 L>mite el;stico
7" -ield point 4 L>mite de elasticidad
<" .ltimate tensile stren!th 4 Resistencia a la tracci2n
=" )racture point 4 Punto de fractura
8O*A+.LAR-
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1" Proportional 4
3" Limit 4
5" Proportionality 4
6" Elastic limit 4
7" -ield point 4
<" .ltimate tensile stren!th 4
=" )racture point 4
8O*A+.LAR-
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1:"5 *omplete the ma!a?ine article a#out sprin!s usin! wordsfrom A, + and * opposite"
8o are the springs used in car suspension made spring9 It sounds li*e asill :uestion, #ut thin* a#out it for a moment. In order for a spring tocompress or extend, then return to its original shape, it must #e ().......ELASTI*.................. . &ut springs are made from ire, and ire is made from 'er (0)
...........(.*TILE.............. metal (often cold dran car#on steel). When theire is manufactured, it is not onl stretched #eond its (1) ........ELASTI* LIMIT....... ! meaning it ill no longer return to its original length! #ut also#eond its(2) ................. -IEL( POI&T......... , here signi7cant, irre'ersi#le(3) ......E@TE&SIO&................ occurs.
"he metal from hich springs are made has therefore #een (5)............PLASTI*ALL- ......... deformed and, conse:uentl, needs to ha'e itsspringiness put #ac*.
"o do this, once a spring has #een formed into a coil, it is tempered! aprocess in hich it is heated and *ept at a high temperature for a
sustained period. "his ;resets; the atomic structure of the metal (partl, atleast), so that after tempering, the spring ill #eha'e as it should ! it can
LET9S PRA*TI*E PART*4
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