NUMERICAL SIMULATION AND OPTIMIZATION OF MULTI-CELL HEXAGONAL CRASH BOX STRUCTURE UNDER AXIAL LOADING
Transportation is a vital aspect of meeting human economic, social, and cultural needs, enabling mobility. The crash box, an integral component of crashworthiness, is specifically designed to deform upon vehicle collision, with the goal of absorbing the maximum amount of impact energy and minimizing...
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| Format: | Final Project |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/74029 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Transportation is a vital aspect of meeting human economic, social, and cultural needs, enabling mobility. The crash box, an integral component of crashworthiness, is specifically designed to deform upon vehicle collision, with the goal of absorbing the maximum amount of impact energy and minimizing harm to drivers and passengers. To achieve optimal configurations, ongoing development of crash boxes is pursued in tandem with advancements in data modeling, which offer valuable insights into patterns and trends.
In this undergraduate project, a crash box simulation is conducted, focusing on both hexagonal and multi-cell hexagonal configurations. Additionally, a multi-objective optimization study is carried out using kriging surrogate modeling, specifically targeting the multi-cell hexagonal configurations. Simulation results demonstrate that incorporating multi-cells enhances the crash box's energy absorption capabilities, leading to improved crashworthiness characteristics compared to configurations without multi-cells.
To further investigate the influence of thickness and circumference on crashworthiness characteristics, data modeling is performed through surface and contour plots. Additionally, a box plot comparison is conducted to analyze the crash box configurations and their corresponding crashworthiness characteristics. The analysis reveals that the HX MC-1 configuration exhibits the highest crashworthiness characteristics based on the maximum value. However, it is important to note that determining the optimal crash box configuration depends on specific limitations and desired crashworthiness characteristics, making the HX MC-1 configuration not an absolute solution.
Optimization with the objective of maximizing Specific Energy Absorption (SEA) and minimizing Peak Crushing Force (Pmax) yields three representative solutions. These solutions consist of a configuration with minimum Pmax, featuring a thickness of 1 and a circumference of 120 mm, a configuration with maximum SEA, characterized by a thickness of 3 and a circumference of 120 mm, and a balanced configuration with a thickness of 2.2084 mm and a circumference of 120 mm. The balanced configuration is chosen to prioritize safety while maximizing energy absorption. Notably, this configuration exhibits non-dominant values for both SEA and Pmax, indicating its favorable performance. |
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