Guardrail Deformation Elements for Energy Absorption
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Solution Overview
Problem
Existing guard rail systems lack effective mechanisms to absorb deformation energy and reduce kinetic energy from vehicle impacts, particularly in constrained spaces, and often require costly reinforcements to achieve optimal containment levels.
Innovation Solution
A guide rail system featuring deformation elements with an approximately U-shaped cross-section, laterally offset from uprights, and connecting elements arranged at an angle to improve force distribution and energy absorption, allowing for better elastic deformation and reduced stress on posts during impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If deformation elements are attached directly to uprights, then connection strength is improved, but kinetic energy absorption is reduced
Solution Approach 1:
The deformation element is attached to the upright at a lateral offset distance rather than directly, creating a moment arm that transforms the connection from a direct axial load path to a system that utilizes rotational deformation. This dimensional change in attachment positioning allows the connection to remain strong while enabling energy-absorbing deformation through the created lever arm effect.
2Reliability
If reinforcement profiles are added to improve containment level, then safety is improved, but system cost increases
Solution Approach 1:
The deformation element is designed to utilize the harmful impact force and transform it into beneficial deformation energy absorption. Instead of resisting the impact force directly through rigid reinforcement, the element deforms in a controlled manner, converting the harmful kinetic energy into deformation work, thereby achieving safety improvement without requiring additional costly reinforcement profiles.
3Reliability
If guide rail system is designed for high containment level, then safety is improved, but space requirements increase
Solution Approach 1:
The system achieves high containment level by changing the behavioral parameters of the deformation element rather than increasing structural dimensions. The element's material properties and geometric configuration are optimized to provide high energy absorption capacity within a compact form, allowing the guide rail system to maintain safety performance in spaces with limited dimensions.
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
Enhances the absorption of deformation energy, reduces kinetic energy, and provides improved containment with a more cost-effective design suitable for spaces with limited dimensions, while maintaining effective range and safety standards.
Implementation Method 1
the deformation elements being designed as deformation elements which are each fastened to a face side of a post facing the further longitudinal profile
Implementation Method 2
allowing for better elastic deformation and reduced stress on posts during impacts
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The guide bar system (1) has a conducting element (2) made from a longitudinal section (5), a staying unit (4) and a fastening element for connecting the conducting element with the staying unit. The other fastening elements (18) are formed as deformation elements. Another longitudinal section (17) is connected with the former longitudinal section with a connecting element (36). An independent claim is also included for a fastening element for fastening a longitudinal section.