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Research themes about vehicle safety become popular lately, as the improving of automotive engineering and the increasing of traffic intensity. One of the automotive engineering developments is a car bumper system. Car attached is to protect part of passenger compartment from frontal collision. This...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/16716 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Research themes about vehicle safety become popular lately, as the improving of automotive engineering and the increasing of traffic intensity. One of the automotive engineering developments is a car bumper system. Car attached is to protect part of passenger compartment from frontal collision. This bumper system will absorb the impact energy of collision through deformation process <br />
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(progressive buckling). With the deformation process, bumper system can lessen damage at passenger and gives deceleration residing in at safety level to passenger <br />
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body. <br />
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This final project will explain about thin walled tubes analysis with circular cross section, this common structure is used as longitudinal at car bumper system, when is crushed by given low-velocity at axial collision. The first aid of research to obtain deformation modes and characteristic of energy absorption at aluminum filled polyurethane foam tube. But, it is not cost effective because of aluminum is expensive materials. Then, Selection of material substitution is conducted. PVC is alternative of material chosen based on literature study. It can used for structure is subjected to axial impact. <br />
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The analysis has been conducted by numerical method using finite element method software non-linear LS-DYNA. Variation of material models, thickness, friction coefficient, and radius of circular tubes has been done for simulation. The analysis result shows that polymer plasticity material model is suitable for finite element simulation PVC material. Increased of thickness is significantly affected to increment mean crushing force if it is compared with changed of circular tubes radius does not affect significantly. Friction coefficient is also not significantly affected mean crushing force. |
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