Uji Lelah Dan Uji Impak

LAPORAN AKHIR  PRAKTIKUM MATERIAL TEKNIK  PERTEMUAN I ( UJI LELAH DAN UJI IMPAK )

Oleh :  Nama

: M.Iqbal. T

12303000

!ae"al N#$. A

12303001

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: #&a *baa"

LA4ORATORIUM MATERIAL TEKNIK  JURU%AN TEKNIK ME%IN 5AKULTA% TEKNIK  UNI6ER%ITA% PA%UNDAN 4ANDUN7 2013

4A4 I PENDAHULUAN 1.1.

1.2.

1.3.

T#8#a" 1. U"#/ U"#/ me"e"#/a" me"e"#/a" /eaha" /eaha"a"9/e/ a"9/e/#aa" #aa" mae$*al mae$*al e$ha&a e$ha&a beba" beba" &*"am*/ &*"am*/.. 4eba" &*"am*/  beba" ;a"- be$#bah aa/ah aa/ah &alam &alam /"&** /"&** ba*/  +. Memaa" Memaa"- e e*me *me" " a&a a&a me*" me*" #8* ,. Me"?aa Me"?aa a"-/a a"-/a ebel#m ebel#m e"-#8* e"-#8*a" a" a&a a&a ?#"e$ ?#"e$ a/# a/# @. Kem#&* Kem#&*a" a" mela/# mela/#/a" /a" e"-#8 e"-#8*a" *a" U8* *ma/  1. Me"-ha Me"-hal# l#/a" /a" e$m#/ e$m#/aa" aa" e*me e*me" " 2. Mela/# Mela/#/a" /a" e"e"-#8* #8*a" a" a"a a"a e* e*me" me" 3. Me"Me"-#/ #/#$ #$ &*m &*me" e"* * e* e*me me" " +. Melea/a" Melea/a" e*me" e*me" a&a a&a eme$a#$e eme$a#$e ;a"- &**"-*"/a" &**"-*"/a" ,. Ja$#m Ja$#m e"#"8 e"#"8#/ #/ e"e$e"e$-; ; &* a#$ a#$ a&a a&a ** ** "l "l @. Me"-a"-/a Me"-a"-/a ba"&#l ba"&#l em#/#l em#/#l &a" /#"?* a&a ema";a ema";a '. Melea/ Melea/a" a" e*m e*me" e" a&a a&a &#&#/a &#&#/a" " e*me e*me" " . Mele Melea a ba" ba"&# &#ll em em#/ #/#l #l . Me"?aa Me"?aa bea$ bea$ e"e$-; e"e$-; ;a"- &* #"8#/ #"8#/a" a" leh leh me*" me*" 10. Mela/#/a" e"-#8*a" e"-#8*a" #"#/ eme$a#$e ;a"- la*" %*ema ema*/ */a e e"#l*a" 4A4 I PENDAHULUAN 1.1. T#8#a" 1.2. P$e&#$ e e"-#8*a" 1.3. %*ema ema**/a e" e"# #l*a" a"

4A4 II DA%AR TEORI 2.1.

U8* lelah

2.2.

%*/l# e-a"-a"

2.3.

U8* *ma/ 

4A4 III TU7A% PENDAHULUAN 3.1. %al 3.2. Jaaba" 4A4 I6 PEN7OLAHAN DATA +.1. Pe"-laha" &aa #8* lelah +.1.1. Pe"-laha" &aa

+.1.2. A"al*a +.2. Daa ha*l e"-#8*a" 4A4 6 ANALI%A DAN KE%IMPULAN

,.1. A"al*a ,.2. Ke*m#la" 4A4 6I %ARAN @.1. %a$a" DA5TAR PU%TAKA

4A4 II DA%AR TEORI 2.1.

U8* Lelah Pe"-#8*a" lelah &aa &*e$-#"a/a" #"#/ mel*ha /eaha"a" #a# mae$*al e$ha&a

 embeba"a" &*"am*/ aa# be$#la"- &*ma"a beba" ;a"- &*be$*/a" &*baah /e/#aa" l#l#h";a. Ke/#aa" lelah &*e"-a$#h* leh ba";a/ Ba$*able> a"a$a la*" : #/#$a" e*me"> be"#/  e*me"> e"-e$8aa" a/h*$> 8e"* beba"9e-a"-a". U"#/ me"e"#/a" baa lelah l-am> ha$# &*la/#/a" e"-#8*a" e$ha&a bebe$aa e*me" #8*. %e*me" e$ama &* #8* a&a e-a"-a" ;a"- $ela*Be *"--*> Ca*l#$e a/a" e$8a&* &e"-a" */l# ;a"- $e"&ah. %e*me" la*"";a &*#8* a&a e-a"-a" ;a"- leb*h $e"&ah &a$* e*me"  e$ama> &a" 8#mlah */l# ;a"- me";ebab/a" Ca*l#$e be$ambah. 4ea$";a beba" ma/*m#m a&alah 0> &a$* /e/#aa" l#l#h #"#/ l-am Ce$$ &a" 0>', &a$* /e/#aa" l#l#h #"#/ l-am "" Ce$$. De"-a" me"--#"a/a" Ba$*able beba" aa# e-a"-a" ma/a me"-ha*l/a" */l# ;a"- be$be&a> eh*"--a &aa &*b#a -$aC*/ % Ca*l#$e a/a" e$8a&* &e"-a" */l# ;a"- $e"&ah. %e*me" la*"";a &*#8* a&a e-a"-a" ;a"- leb*h $e"&ah &a$* e*me" e$ama> &a" 8#mlah */l# ;a"- me";ebab/a" Ca*#$e be$ambah. Te-a"-a" ;a"- e$8a&* a&a e*me" &*baah baa lela h";a *&a/ a/a" me";ebab/a"  aah. A-a$ $"-a$#h /ealaha" e/e?*l m#"-/*"> ma/a e*me" ;a"- &* #8* 8#mlah";a  ba";a/. 4ebe$aa e*me" &*#8* a&a e-a"-a" ;a"- ama a-a$ &*e$leh &aa ;a"- a/#$a. Je"* embeba"a" ee$* aaha" lelah a/*ba beba" $*. Rea/ lelah be$aal a&a  e$m#/aa" aa e*me"> ;a"- me$#a/a" b*&a"- e$8a&*";a e-a"-a" a$*/ ma/*m#m. Pembeba"a" be"&*"- : be"&*"- ea$ah> be"&*"- be$#la"- &a" be"&*"- $a*. Rea/  lelah be$m#la &a$* e$m#/aa" a$a# #&# &a" #mb#h a&a &ae$ah e-a"-a" a$*/ ma/*m#m.

U"#/ le"#$ be$#la"-> $ea/ lelah b*aa";a be$m#la a&a /e&#a e$m#/aa" aa &a"  baah. Ka$e"a ba-*a" aa &a" baah e$m#/aa" e*me" #8* me"-alam* e-a"-a" e/a" &a" a$*/. 2.2. %*/l# e-a"-a" K"&** #m#m embeba"a" Ca*-#e ha$# meme$ha*/a" e"-a$#h e-a"-a" $aa beba" a/*al aa# ha";a beba" $* 2. %*Ca mae$*al hm-e"; &a" beba &a$* e-a"-a" *a aal %*/l# e-a"-a" bla/ bal*/ le"-/a : -$aC*/ *"* &* &aa &a$* #a$a" $ a&a /e?eaa" /"a" a"a beba" be$leb*h> &*la/#/a" a&a me*" e"-#8a" lelah le"#$ $a*. U"#/ */l#  8e"* *"* e-a"-a" ma/*m#m &a" m*"*m#m a&alah ama. %*/l# e-a"-a" be$#la"- : e-a"-a" ma/*m#m &a" e-a"-a" m*"*m#m *&a/ ama %*/l# e-a"-a" /mle/ : */l# e-a"-a" ee$* *"* &aa e$8a&* a&a ba-*a" a;a eaa ;a"- me"e$*ma beba" be$leb*ha" e?a$a e$*&*?> &a" *&a/ &aa &*e$-#"a/a". σ m

: e-a"-a" $aa *ma/ ?ha$; mem**/a" e*me" e?a$a h$*F"al &a" beba" *ma/ &aa"- &a$* a$ah bela/a"- a/*/. %e&a"-/a" a&a *ma/ *F&> e*me" &*lea/a" &alam ** Be$*?al &a" beba" *ma/ &aa"- &a$* a$ah &ea" a/*/.

Beban impak

Beban

7amba$ 2.2. /ema* e"-#8*a" *ma/ ?ha$; &a" *F& Pa&a aa e"&#l#m membe"#$ e*me" &a" e$8a&* aaha" > me*" me$e/am bea$  e"e$-; ;a"- &* e$a leh e*me" (&alam a#a" J#le). Ma/*" bea$ e"e$-; ;a"- &* e$a> me"#"8#/a" *"--*";a e"e$-; *ma/";a. E"e$-; *ma/ &aa &*#$#"/a" &a$* e$amaa" e"e$-; e"*al> ;a*# : ..........Pe$.2.+  Ep=m . g . ∆ h =m . g . ( h1 −h2 ) ..........Pe$.2.,  E p  HI = D*ma"a :

m : maa ba"&#l (/-) - : /"a" -$aB*a* (m9 2) Gh : e$be&aa" ** ba"&#l (m) U"#/ &aa mela/#/a" e"-#8*a" a&a e*me"> e$ama /al* e"&#l#m &*a"-/a h*"--a me"?aa* aal. %e*me" &*ema/a" a&a &#&#/a"";a #"#/ /em#&*a" &*be"#$  leh e"&#l#m. E"e$-; e"*al *a e"&#l#m me";ebab/a" e"&#l#m e$# be$a;*" eelah membe"#/ e*me". Pe"-#8*a" ;a"- me"-ha*l/a" e"e$-;9ha$-a *ma/ ;a"- ?#/# *"--* ma/a &aa &*/aa/a" mae$*al9l-am ;a"- &*#8* be$*Ca #le e&a"-/a" e"e$-; *ma/ $e"&ah me"a"&a/a" mae$*al -ea. H#b#"-a" e"e$-; *ma/ &a" *Ca #le9-ea #"#/ be$ba-a* eme$a#$e e"-#8*a" &*#"8#/a" a&a -amba$ be$*/# :

7amba$ 2.3. /#$Ba e"e$-; *ma/ B eme$a#$  a$a la*" me"-#/#$ *Ca #le9-ea l-am ha*l #8* *ma/ a&alah &e"-a" mel*ha  e$m#/aa" aaha" aa/ah e$m#/aa" aaha" e$eb# be$e$a (aaha" a/*ba -ee$a") aa# -$a"#la$ (?leaBa-e> aaha" ama/ e$a"-) aa# ?am#$a" /e&#a";a. Paaha" be$e$a me"#"8#/a" *Ca #le &a" aaha" -$a"#la$ be$a$* l-am -ea. %eelah alah a# #8#a"  e"-#8*a" *ma/ a&alah me"&aa/a" ee$a#$ &a" &*e$leh e"e$-; *ma/ /em#&*a" /e&#a";a &* h#b#"-/a" melal#* /#$Ba ee$* e$l*ha a&a -amba$ &* aa.

4A4 III TU7A% PENDAHULUAN 3.1.

%al U8* *ma/  1. Aa #8#a" $a/*/#m #8* *ma/  2. Jela/a" #8* *ma/ me"#$# me&e *F& &a" ?ha$;  3. Aa ;a"- &*ma/#& &e"-a" eme$a#$e $a"**> &a" be$*/a" ?"h mae$*al ;a"+. ,. @. '.

mem*l*/* &a" ;a"- *&a/ mem*l*/* eme$a#$e $a"** Jela/a" $e&#$ #"#/ me"-eah#* eme$a#$e $a"** &e"-a" e"-#8*a" *ma/ Jela/a" e$be&aa" a"a$a aah #le &e"-a" aah -ea Aa /e-#"aa" eme$a#$e $a"** a&a e$e"?a"aa" #a# eleme" me*" 5a/$ ema/*" *"--* #h# ma/a /e#le#a" &a$* #a# mae$*al a/a" be$ambah> &a" /e*/a #h# #&ah $e"&ah> ma/a /e-eaa"";a ;a"a/a" be$ambah.

4A4 6 %ARAN ,.1

%a$a" •

U"#/ me*" #8* lelah> /*a *&a/ b*a mela/#/a" e"-#8*a"> /a$e"a me*" $#a/> 8a&* hal *"* 8a"-a" ama* e$8a&* a&a me*" ma/a &a$* *# *"-/a/a"

•

#"#/ e$aaa" me*"