σ
y
= 57,82
mm 67,83
kg 3922
2
= kgmm
2
= 578,2 MPa c. 1 mm =
167 2
, 44
=0,265 ty = 146 mm
Py= 3869
10000 100
265 ,
146 =
x x
kg σ
y
= 59,48
mm 65,05
kg 3869
2
= kgmm
2
= 594,8 MPa Rata-rata =
577,1 3
MPa 1731,3
3 MPa
594,8 578,2
558,3 =
= +
+ MPa
3. Variasi arus 160 A
Perbandingan 1:2
.a. 1 mm= =
2 90
2 ,
47 x
0,272 ty = 74 mm
Py= 3877,6
kg x10000
100 74x2x0,268
= kg
σ
y
= 8
54,5 mm
71,04 kg
3877,6
2
= kgmm
2
= 545,8 MPa b. 1 mm =
2 79
7 ,
42 x
=0,27 ty = 64 mm
Py= 3456
kg x10000
100 64x2x0,27
= kg
σ
y
= 53,13
mm 65,05
kg 3456
2
= kgmm
2
=531,3 MPa
c. 1 mm = 2
83 4
, 43
x =0,261
ty = 72 mm Py=
3765,6 kg
x10000 100
72x2x0,261 =
kg σ
y
= 55,97
mm 67,28
kg 3765,6
2
= kgmm
2
= 559,7 MPa
Rata-rata = 545,6
3 MPa
1636,8 3
MPa 559,7
531,3 545,8
= =
+ +
MPa
3. Perhitungan Perpanjangan
ε = 100
100 x
L L
L x
L L
− =
Δ
Dimana : ε = elongation
L = Panjang setelah ditarik mm L
= Panjang sebelum ditarik mm 1. Variasi arus 100 A
a. ε =
18,80 x100
mm 20
mm 3,76
100 x
mm 20
mm 20
23,76 =
= −
b. ε =
18,55 x100
mm 20
mm 3,71
x100 mm
20 mm
20 23,71
= =
−
Rata-rata = 68
, 18
2 55
, 18
8 ,
18 =
+ 2. Variasi arus 130 A
a. ε =
13,36 x100
mm 20
mm 2,67
x100 20mm
mm 20
22,67 =
= −
b. ε =
18 x100
20mm mm
3,6 x100
mm 20
mm 20
23,6 =
= −
c. ε =
17 x100
mm 20
mm 3,4
x100 mm
20 mm
20 23,40
= =
−
Rata-rata = 12
, 16
3 17
18 36
, 13
= +
+ 3. Variasi arus 160 A
a. ε =
25,3 x100
mm 20
mm 5,06
x100 mm
20 mm
20 25,06
= =
−
b. ε =
20,4 x100
mm 20
mm 4,08
x100 20mm
20mm 24,08
= =
−
c. ε =
24,4 x100
mm 20
mm 6,1
x100 mm
20 mm
20 24,88
= =
−
Rata-rata = 37
, 23
3 4
, 24
4 ,
20 32
, 25
= +
+
4. Perhitungan Reduksi Penampang
q= 100
100
1
x A
A A
x A
A −
= Δ
Dimana : A = Luas mula-mula mm
2
A
1
= Luas setelah ditarik mm
2
q = Reduksi penampang 1. Variasi arus 100 A
a. 36,49
x100 mm
66,93 mm
24,42 x100
mm 66,93
mm 42,51
66,93 q
2 2
2 2
= =
− =
b. q = 44,48
x100 mm
65,60 mm
29,18 x100
mm 65,60
mm 36,42
65,60
2 2
2 2
= =
−
Rata-rata= 485
, 40
2 48
, 44
49 ,
36 =
+ 2. Variasi arus 130 A
a. 36,26
x100 mm
66,72 mm
24,19 x100
mm 66,72
mm 42,53
66,72 q
2 2
2 2
= =
− =
b. q = 39,14
x100 mm
67,83 mm
26,55 x100
mm 67,83
mm 41,28
67,83
2 2
2 2
= =
−
c. q = 39,82
x100 mm
65,05 mm
25,9 x100
mm 65,05
mm 39,15
65,05
2 2
2 2
= =
−
Rata-rata= 41
, 38
3 82
, 39
14 ,
39 26
, 36
= +
+ 3. Variasi arus 160 A
a. 57,47
x100 mm
71,06 mm
40,84 x100
mm 71,06
mm 30,22
71,06 q
2 2
2 2
= =
− =
b. q = 56,68
x100 mm
65,05 mm
36,87 x100
mm 65,05
mm 41,28
65,05
2 2
2 2
= =
−
c. q= 58,26
x100 mm
67,28 mm
39,2 x100
mm 67,28
mm 28,18
67,28
2 2
2 2
= =
−
Rata-rata= 47
, 57
3 26
, 58
68 ,
56 47
, 57
= +
+
