Energy Absorption Assembly Using Straight and Curved Steel Wires
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Solution Overview
Problem
Current road safety barriers made of steel and concrete are costly and heavy, and existing energy absorption designs do not effectively absorb impact energy to reduce damage and injury in vehicle collisions.
Innovation Solution
An assembly comprising straight steel wires with high tensile strength and elongation, combined with curved steel cords of even higher tensile strength, fixed together to create a structure with three zones of deformation for enhanced energy absorption, including elastic and plastic deformation zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional steel and concrete materials are used for safety barriers, then strength and energy absorption are improved, but weight and cost increase
Solution Approach 1:
The patent uses a composite structure combining steel wires (tensile strength ≥1000 MPa, elongation ≥5%) with polymer matrix material. This composite approach provides high strength and energy absorption comparable to steel-concrete barriers while significantly reducing weight. The steel wires provide tensile strength and ductility, while the polymer matrix provides compression resistance and structural integrity.
2Strength
If steel wires with high tensile strength are used, then energy absorption is improved, but manufacturing complexity increases
Solution Approach 1:
The safety barrier is segmented into discrete steel wire elements (m number of straight steel wires) that are individually manufactured to standardized specifications and then assembled into the final structure. This segmentation allows for simplified manufacturing of individual components while achieving high overall strength through the collective arrangement of multiple elements.
Solution Approach 2:
The patent specifies precise parameter ranges for the steel wires (tensile strength ≥1000 MPa, elongation ≥5%) and the polymer matrix, allowing manufacturers to work within defined specifications. This standardization of parameters simplifies the manufacturing process while ensuring consistent high-performance results.
3Strength
If curved steel cords with high tensile strength are combined with straight steel wires, then energy absorption capability is improved, but device complexity increases
Solution Approach 1:
The patent employs different steel element configurations in different zones of the barrier structure. Straight steel wires (m number) provide primary tensile strength, while curved steel cords (n number) with elongation at least 2% larger than the straight wires provide additional energy absorption in specific deformation zones. This local differentiation of element types optimizes energy absorption while maintaining manageable structural complexity.
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 assembly provides improved energy absorption capabilities, effectively dissipating impact energy and reducing damage in collisions, while being cost-effective and lightweight, with the ability to be easily manufactured and adapted for various applications.
Implementation Method 1
a first zone is characterized by an elastic deformation of the substantially straight steel wires
Implementation Method 2
a second zone is characterized by the plastic deformation of the substantially straight steel wires
Implementation Method 3
a third zone is composed of the continued plastic deformation of the substantially straight steel wires and the elastic deformation of the curved steel cords
Data Source
AI summary
Assembly for energy absorption, comprising m number of substantially straight steel wires and n number of curved steel cords, at least one of the m number of substantially straight steel wires having a tensile strength of at least 1000 MPa and an elongation at fracture of at least 5%, at least one of the n number of curved steel cords having a tensile strength of at least 2000 MPa and an elongation at fracture of at least 2%, wherein m and n are integers m>1, n>1, and at least one of the m number of substantially straight steel wires and at least one of the n number of curved steel cords are fixed together along their longitudinal direction, and the elongation at fracture of at least one of the m number of substantially straight steel wires is at least 2% larger than the elongation at fracture of at least one of the n number of curved steel cords such that the elongation curve of the assembly comprises three zones (11, 11′, 12, 12′, 13, 13′), wherein a first zone (11,11′) is characterized by an elastic deformation of the substantially straight steel wires, a second zone (12,12′) is characterized by the plastic deformation of the substantially straight steel wires and a third zone (13,13′) is composed of the continued plastic deformation of the substantially straight steel wires and the elastic deformation of the curved steel cords.