PSI - Issue 27

Laksmana Widi Prasetya et al. / Procedia Structural Integrity 27 (2020) 125–131 Prasetya et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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cheap and simply available compared to materials commonly used as impact attenuators like aluminum, honeycomb, Nomex, carbon composite, Kevlar, aluminum foil or a mixture of those materials. This study aims to analyze the crashing behavior of the impact attenuator with waste food cans for a race car. To investigate the energy absorbing capability, the numerical simulation uses the Finite Element software ANSYS LS DYNA. Additionally, numerical simulation was founded with a universal testing machine that supported the quasi

static condition. 2. Methodology 2.1. Geometry and material

Impact Attenuator in this study consisted of 3 parts. The first is a waste of food cans, then the rigid plate, and the last is the anti-intrusion plate. Waste food cans are arranged in 2 levels. The first level is arranged with 6 cans, then on top of 5 cans. Waste food cans have a diameter of 72.4 mm with a thickness of 2 mm and a height of 113 mm. The rigid plate has a size of 250 x 250 mm with 2 mm thickness, which serves as a buffer for the cans at the top. The last part is the anti-intrusion plate, which has a size of 325.4 x 305.4. The total height of the overall impact attenuator is 232 mm, as shown in Fig. 1 below.

Fig. 1. Geometric model of impact attenuator (a) Isometric view; and (b) Left side view.

The material used in this waste food cans is aluminum alloy 3004. The mechanical properties of the material are shown in Table 1 below.

Table 1. Mechanical properties of waste food cans. Material type

Properties

Values

Density (kg/mm 3 )

27126 x 10 -3

Modulus of Elasticity (GPa)

689480 689480

Alumunium alloy 3004

Yield Stress (GPa) Poisson’s Ratio

0.33

And the following Table 2 below is the mechanical properties used for rigid parts, the first rigid wall as a collector, rigid plate, and the last is anti-intrusion plate as support.

Table 2. Mechanical properties of rigid parts. Material type

Properties

Values

Density (kg/mm 3 )

0.75 193 0.33

Rigid material

Modulus of Elasticity (GPa)

Poisson’s Ratio