PSI - Issue 5

Jung Min Sohn et al. / Procedia Structural Integrity 5 (2017) 943–950 Aditya Rio Prabowo et al. / Structural Integrity Procedia 00 (2017) 000 – 000

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4.2. Force and acceleration responses of the bottom structure

An observation of structural crashworthiness is also conducted to other structural responses, namely force and acceleration of the target structure. Two defined positions of the indenter in grounding simulation are concluded to provide different tendency of the responses. In terms of resultant force, the Position 1 which is lower than the Position 2 produced later penetration on the bottom structure. Topology of the indenter was directly influencing the force that conical indenter becomes smaller to the top part of its body. In the Position 1, the indenter was set to be lower than the bottom structure which the top part (has smaller section) impacted the structure. Range of this part was short so that the initial contact with structure of the Position 1 was later than the other one.

Fig. 5. Structural response in grounding with two different positions of the indenter: resultant force.

Fig. 6. The resultant acceleration of the bottom structure. Sequences of the crushing process throughout impact time are denoted by the dotted lines.