PSI - Issue 27

Aditya Rio Prabowo et al. / Procedia Structural Integrity 27 (2020) 171–178 Prabowo et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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7

Displacement – X axis (m)

Displacement – Y axis (m)

Displacement – Y axis (m)

Displacement – X axis (m)

(a)

Displacement – X axis (m)

Displacement – Y axis (m)

Displacement – Y axis (m)

Displacement – X axis (m)

(b) Fig. 5. Rupture pattern with displacement contours on the middle structures: (a) at the Location 3; and (b) at the Location 4.

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Low-Carbon Steel Medium-Carbon Steel Alloy Steel

6

Increasing tendency of energy is match with values of yield strength for low and medium carbon steel .

4

Alloy steel produced higher energy than medium-carbon steel.

2

Collision Energy (MJ) Dissipated Ener ( J)

0

0.0

0.5

1.0

1.5

2.0

Displacement (m)

Fig. 6. Energy dissipation for different material classes.

The damage pattern from analysis on the collision location aspect showed similarity and identical to each other. This phenomenon can be caused because the distance of one target point to the other points was not very far. The energy dissipation for different material types (in Fig. 6) indicated that the yield strength had significant influence. This statement is concluded since this parameter also controlled how long the material will yield when subjected to a certain load before it reached the ultimate strength and failure of each involved material on collision. Despite this r esult, when Young’s modulus between two materials was the same, and the difference of yield strength was not significant, other material properties contributed to the outcome. In these analyses, the energy dissipation of material with higher yield strength less than other material with lower yield strength. The example of this phenomenon was shown between low-carbon and alloy steel in the present study. The density of low-carbon steel is 0.19 % denser than alloy steel, and low-carbon produced energy is slightly bigger even though the yield strength of alloy steel is higher.