Fiber-Reinforced Resonator Tearing Element for Vehicle Impact
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Solution Overview
Problem
Energy absorption efficiency of fiber-reinforced resin members in vehicle collision structures is limited due to the non-rupture of reinforcing fibers, which restricts the effective absorption of collision energy.
Innovation Solution
Incorporating a tearing element, such as bolts or projections, adjacent to the energy-absorbing member that intersects the reinforcing fibers, allowing them to be severed during impact, thereby enhancing energy absorption efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the energy-absorbing member is made of fiber-reinforced resin, then the structural strength is improved, but the energy absorption efficiency deteriorates because the reinforcing fibers do not readily rupture
Solution Approach 1:
The patent introduces tearing elements (such as notches, holes, or protrusions) adjacent to the energy-absorbing member before collision occurs. These tearing elements are pre-positioned to intersect with the reinforcing fibers, ensuring that when collision happens, the fibers will be severed by the tearing elements rather than just deforming the matrix resin. This preliminary arrangement of tearing elements enables the intended fiber rupture mechanism to occur effectively during impact.
2Loss of energy
If the reinforcing fibers are made to rupture to enhance energy absorption, then the energy absorption efficiency is improved, but the structural integrity deteriorates
Solution Approach 1:
The patent applies local quality by positioning tearing elements only at specific locations adjacent to the energy-absorbing member, rather than throughout the entire structure. The tearing elements are strategically placed where fiber rupture is most beneficial for energy absorption while minimizing impact on overall structural integrity. This localized approach allows fiber severing to occur in controlled regions without compromising the strength of the entire energy-absorbing member.
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 solution significantly increases energy absorption efficiency by allowing the reinforcing fibers to rupture, leading to improved impact absorption and reduced scattering during collisions.
Implementation Method 1
a tearing element, which tears the energy-absorbing member when a collision load is input from a load-receiving member onto the energy-absorbing member
Implementation Method 2
the collision energy is absorbed by the crushing of the energy-absorbing member
Implementation Method 3
the deformation of a matrix resin with impregnated reinforcing fibers
Data Source
AI summary
An energy absorption structure has a frame member of a vehicle body framework, an energy absorption member formed from fiber-reinforced resin and a load-receiving member. The energy absorption member is provided at an end of the frame member in the front-rear direction of the vehicle body. The load-receiving member is provided on the energy-absorbing member on a side opposite to the frame member. A tearing element is provided adjacent an end portion of the energy-absorbing member corresponding to at least one of the load-receiving member and the frame member. The tearing element tears the energy-absorbing member due to an impact load that is inputted from the load-receiving member toward the energy-absorbing member, thereby severing the reinforcing fibers.