Impact Absorber Extended Wall Thickness Variation
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Solution Overview
Problem
Existing impact absorbers in vehicles experience reduced performance in side collisions due to buckling deformation, where extended walls may contact each other, leading to incomplete deformation and compromised impact absorption.
Innovation Solution
An impact absorber design featuring an extended wall with increasing thickness from the vehicular interior to the exterior, incorporating cutout holes that open towards the exterior, and a configuration that allows for even deformation across the thickness, reducing the likelihood of complete buckling and enhancing absorption performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If extended walls are made thin to allow buckling deformation for impact absorption, then impact absorbing performance is improved, but the extended walls may contact each other during deformation causing incomplete buckling and reduced performance
Solution Approach 1:
The extended wall is designed with non-uniform thickness, having a first thickness in the interior portion and a second thickness in the exterior portion. This local quality variation allows different sections of the wall to serve different functions: the thinner interior portion facilitates buckling initiation while the thicker exterior portion prevents contact between adjacent walls during deformation, ensuring complete and reliable buckling behavior.
Solution Approach 2:
The thickness parameter of the extended wall is changed along its length, transitioning from a first thickness at the interior end to a second thickness at the exterior end. This parameter change enables the wall to exhibit controlled deformation characteristics, allowing buckling to occur in specific regions while maintaining structural integrity in other regions to prevent wall-to-wall contact.
2Reliability
If extended walls are made thick to prevent contact during deformation, then deformation completeness is improved, but impact absorbing performance is reduced due to resistance to buckling
Solution Approach 1:
The extended wall is designed with non-uniform thickness, having a first thickness in the interior portion and a second thickness in the exterior portion. This local quality variation allows different sections of the wall to serve different functions: the thinner interior portion facilitates buckling initiation while the thicker exterior portion prevents contact between adjacent walls during deformation, ensuring complete and reliable buckling behavior.
Solution Approach 2:
The thickness parameter of the extended wall is changed along its length, transitioning from a first thickness at the interior end to a second thickness at the exterior end. This parameter change enables the wall to exhibit controlled deformation characteristics, allowing buckling to occur in specific regions while maintaining structural integrity in other regions to prevent wall-to-wall contact.
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 design ensures consistent and effective impact absorption by facilitating deformation of the extended wall's thicker exterior portions, maintaining performance throughout the collision and reducing the risk of damage to securing components.
Implementation Method 1
The extended wall is buckled and deformed to absorb impact caused by a side collision
Data Source
AI summary
An impact absorber to be mounted between a vehicular panel and a vehicular interior part covering the vehicular panel from a vehicular interior side includes an opposite wall to be opposite the vehicular panel, outer walls extending from edges of the opposite wall toward a vehicular interior side, and an extended wall extending from the opposite wall toward the vehicular interior side and having a side edge connected to the one outer wall, and the extended wall having a thickness that is increased from a vehicular interior end thereof toward a vehicular exterior end thereof, and the extended wall having a cutout hole that is open toward a vehicular exterior side.