EXPERIMENTAL STUDY OF HEXAGONAL CRASH BOX STRUCTURE WITH LATTICE-FILLED UNDER QUASI-STATIC AXIAL LOADING
The increase in the number of vehicles each year is accompanied by an increase in the number of accidents. A crash box is a crucial component in the safety aspect known as crashworthiness, which aims to reduce the number of fatalities in the event of an accident. Crash boxes have evolved rapidly...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/85516 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The increase in the number of vehicles each year is accompanied by an increase in
the number of accidents. A crash box is a crucial component in the safety aspect
known as crashworthiness, which aims to reduce the number of fatalities in the
event of an accident. Crash boxes have evolved rapidly from simple shapes to
complex forms, such as multi-cell and lattice-filled structures. The development of
crash boxes is also accompanied by advancements in additive manufacturing (AM),
which provides advantages in modeling more complex crash boxes while
maintaining a lightweight structure. Therefore, an experimental study was
conducted on hexagonal crash box structure with lattice-filled under quasi-static
axial loading. This research aims to analyze the effects of curing time variation on
the performance of 3D printed structures and the impact of adding lattice structures
on the crashworthiness performance of the crash box structure. The 3D printing
structure manufacturing process was carried out using the stereolithography (SLA)
method with a resin 3D printer. The hexagonal close-packed modification (HCPM)
geometry was selected as the lattice-filled structure.
Compression tests under quasi-static axial loading were performed on lattice, crash
boxes, and crash box lattice-filled structures. The results showed that different
curing times had an impact on structural performance. In the compression tests, a
curing time of 30 minutes was found to be the configuration with the best
crashworthiness characteristics, with the domination method used to represent
each sample at each curing time. The addition of lattice-filled structures to the
crash box proved to enhance the crash box’s ability to withstand forces and absorb
energy, as well as improve crashworthiness characteristics. The percentage
increase in ????????, ????????, ???????????????? , and ???????????? values for aluminum and 3D printed latticefilled
crash boxes were 20% - 9.4% - 12.7% - 7.2% and 7.4% - 6.6% - 75.7% -
3.6%, respectively. However, the ???????????? value decreased by 30.1% and 23.9% for
aluminum and 3D printed crash box lattice-filled structures, respectively, due to the
increased mass of the crash box structure.
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