Roadway Border Deformation Element for Energy Absorption
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Solution Overview
Problem
Existing lane delimitation devices struggle to effectively absorb and control the energy transferred from vehicles, often resulting in excessive displacement of separating elements, which is difficult to manage due to limited space and variable energy absorption parameters.
Innovation Solution
Incorporating a metal deformation element, such as a folding tube with indentations or notches, between a stop block and a counter bearing on the separating element, allowing for controlled energy absorption through plastic or elastic deformation, optimized by selecting the tube's length, diameter, and material based on energy requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional connecting members are used to connect separating elements, then the structure is simple and easy to manufacture, but the energy absorption capability is insufficient and displacement control is poor
Solution Approach 1:
The connecting member is segmented into multiple functional parts: a first connecting part for connecting to the first separating element, a second connecting part for connecting to the second separating element, and at least one deformation element positioned between them. This segmentation allows each part to perform its specific function independently, enabling controlled deformation for energy absorption while maintaining overall structural integrity.
Solution Approach 2:
The deformation element acts as an intermediary component between the two connecting parts. It is specifically designed to deform under impact forces, absorbing energy through controlled deformation while preventing excessive displacement of the separating elements. This intermediary element mediates the force transmission between connected separating elements.
2Strength
If the separating elements are made rigid to maintain structural integrity, then the stability is improved, but the energy absorption capability deteriorates due to limited deformation
Solution Approach 1:
The connecting member exhibits local quality differentiation: the connecting parts maintain high rigidity for stable connection to separating elements, while the deformation element is designed with specific material properties and geometric features (such as fold lines, notches, or thin-walled structures) that enable controlled deformation. This local variation in mechanical properties allows simultaneous achievement of structural integrity and energy absorption.
Solution Approach 2:
The deformation element's mechanical parameters (such as wall thickness, material strength, geometric dimensions) are specifically optimized to achieve desired energy absorption characteristics. By adjusting these parameters, the element can be designed to deform at specific force levels, absorbing energy through controlled plastic or elastic deformation while maintaining overall structural stability.
3Strength
If the deformation element is designed to absorb more energy, then the energy absorption capability is improved, but the displacement of separating elements increases beyond acceptable limits
Solution Approach 1:
The deformation element's geometric parameters (length, cross-sectional dimensions, wall thickness) and material properties are precisely optimized to achieve the target energy absorption while limiting displacement. By adjusting these parameters, the element can be designed to deform in a controlled manner, absorbing energy through progressive deformation stages while maintaining displacement within acceptable limits.
Solution Approach 2:
The deformation element is designed to exhibit dynamic deformation behavior under impact, transitioning from rigid to deformable state as force increases. This dynamic response allows the element to absorb energy through controlled deformation while preventing excessive displacement, adapting its mechanical properties to the applied load conditions.
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
This design enables precise and controlled energy absorption with minimal spatial displacement of the separating elements, enhancing the device's ability to manage kinetic energy from vehicles while preventing excessive displacement.
Implementation Method 1
the energy is consumed by plastic deformation or initially stored temporarily by elastic deformation
Implementation Method 2
the energy is consumed by plastic deformation or initially stored temporarily by elastic deformation
Data Source
Figure 1a~2b
Figure 3~4
Figure 5
AI summary
The lane boundary device has separating elements (1) such as concrete and/or metal elements of same shape, which are arranged along the edge of the road, or between lanes, and beside the longitudinal direction and in communication with each other. The separating element has deformation element (2) provided between a stop (3) fixed on the road bump and thrust bearing (4) provided on the separating element, such that the deformation element is deformed by the force applied at the side of the separating element.