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Due to technical issues with manufacturing the bottom panel, it was no longer possible to manufacture a structural bottom panel. To accommodate for this change in design, additional tubes were added to the Chassis to support passenger weight. Tubes have been added underneath the seats of the driver and passengers. An additional semi-structural floor would be added on top of these tubes to provide more structural integrity.
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Chassis simulations had to be carried out to ensure that the new chassis re-design still passes vehicle collision scenarios. The following are the results for the simulations. Since the design features only the chassis being structural, only the beam tool was used in this stress analysis of the vehicle collisions. The minimum combined stress and the maximum combined stress.
Concerning Vehicle Collision Results Overview
This table outlines vehicle collision scenarios that were above the magnitude of 300 MPa
Vehicle Collision | Minimum Combined Stress (MPa) | Maximum Combined Stress (MPa) | Notes |
|---|---|---|---|
A Pillar | 300 | ||
B Pillar | -388 | ||
Back Bar | |||
C Pillar | 359 | ||
Front 30 Wall | |||
Front 60 Wall | |||
Front Bar | |||
Side 30 Wall | |||
Side 60 Wall | |||
Top 30 Wall | -320 | 335 | |
Top 60 Wall | |||
Top | -336 | 327 |
4130 Chromoly Steel Material Properties
Property | Value |
|---|---|
Young’s Modulus (MPa) | 198 000 |
Poisson’s Ratio | 0.294 |
Bulk Modulus (MPa) | 160190 |
Shear Modulus (MPa) | 76507 |
Tensile Yield Strength (MPa) | 435 |
Compressive Yield Strength (MPa) | 435 |
Tensile Ultimate Strength (MPa) | 652 |
Compressive Ultimate Strength (MPa) | 475 |
Maximum Combined Stress Results
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Minimum Combined Stress Results
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It seems that yield strength for 4130 chromoly steel has been approximated as 460 MPa for MSXII
Minimum Combined Stress Results
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Maximum Combined Stress Results
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