Vehicle Skeleton Structure with Concave Beads for Controlled Deformation
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Solution Overview
Problem
Existing vehicle skeleton structures do not effectively deform in a desired mode during collisions, leading to inefficient energy absorption and potential barrier intrusion into the vehicle cabin.
Innovation Solution
A die-cast vehicle skeleton structure with transverse and longitudinal concave beads is integrated into the side members, allowing controlled deformation during collisions, with transverse beads at the leading end and longitudinal beads at the base end to manage energy absorption and prevent barrier entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional vehicle skeleton structure is used, then the structure is simple and easy to manufacture, but the structure cannot deform in a desired mode during collision leading to inefficient energy absorption
Solution Approach 1:
The side member is segmented by introducing concave beads at specific positions (leading end and base end) to create distinct deformation zones. The leading end concave bead enables controlled collapse for energy absorption, while the base end concave bead prevents barrier intrusion, achieving desired deformation mode through structural segmentation
Solution Approach 2:
Different regions of the side member are given different local qualities through strategic placement of concave beads. The leading end features concave beads that promote collapse and energy absorption, while the base end features concave beads that resist barrier intrusion, creating localized functional differences within the overall structure
2Loss of energy
If the side member is designed to collapse easily for energy absorption, then energy absorption improves, but barrier intrusion into the vehicle cabin increases
Solution Approach 1:
The side member is divided into functional segments: the leading end with concave beads for energy absorption collapse, and the base end with concave beads for barrier intrusion prevention. This segmentation allows different parts to perform different protective functions simultaneously
Solution Approach 2:
The base end of the side member is given enhanced local quality through concave bead placement that specifically prevents barrier intrusion, while the leading end maintains properties favorable for energy absorption collapse, creating differentiated local functions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The structure enables controlled deformation and efficient energy absorption, preventing barrier intrusion into the vehicle cabin by directing deformation modes to absorb collision loads effectively.
Implementation Method 1
when a collision load is input to the side member during a vehicle collision, the leading end side of the side member collapses from the transverse concave bead as a starting point, and energy is absorbed
Implementation Method 2
the base end side of the side member is less likely to collapse in the front-rear direction as a result of the longitudinal concave bead, thereby suppressing entry of the barrier
Data Source
AI summary
A vehicle skeleton structure, including: a die-cast skeleton body formed integrally and including a floor part configuring a vehicle cabin floor portion and a side member extending from the floor part towards a vehicle front or a vehicle rear; a transverse concave bead, the transverse concave bead being formed at a leading end side of the side member in the skeleton body, and the transverse concave bead extending in at least one of a vehicle width direction or a vehicle vertical direction; and a longitudinal concave bead, the longitudinal concave bead being formed at a base end side of the side member in the skeleton body, and the longitudinal concave bead extending in a vehicle front-rear direction.