BAB III

DATA PERCOBAAN

DATA

jenis mesin tarik : TARNOGROKI

beban skala penuh : 20000 N

panjang uji awal : 25.8 mm

diameter awal : 6.45 mm

kekerasan awal : 38 HRA

kecepatan tarik : 5 mm/menit

diameter patahan : 4.03 mm

panjang uji setelah patahan :

kekerasan setelah pengujian : 48.5 HRA

PENGOLAHAN DATA

Load and ∆𝑳

Engineering Stress and Strain

0.00000000000

100.00000000000

200.00000000000

300.00000000000

400.00000000000

500.00000000000

600.00000000000

0.000000000000010.000000000000020.000000000000030.000000000000040.000000000000050.000000000000060.0000000000000

F vs dLF vs dL

True Stress dan True Strain

Log True Stress dan Log True Strain

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

0 0.5 1 1.5 2 2.5

Engineering Stress and Strain

Engineering Stress andStrain

0

5000

10000

15000

20000

25000

30000

35000

40000

45000

50000

0 0.2 0.4 0.6 0.8 1 1.2

True Stress (N/mm2)

True Stress (N/mm2)

Data hasil pengujian mekanik

Besaran Mekanik Hasil Percobaan

Tensile Strength

Yield Strength

Modulus Elastisitas

Koefisien Kekuatan

Bahan (K)

Eksponen Strain

Hardening (n)

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

-2 -1.5 -1 -0.5 0 0.5

log true stress

log true stress