Fiber-Reinforced Resin Floor Panel Ribs
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Solution Overview
Problem
Fiber-reinforced resin vehicle floor panels face issues with thermal characteristics variability and deformation due to thermal diffusivity and heat transfer coefficient variations during manufacturing, and are prone to deformation under external loads during vehicle collisions.
Innovation Solution
A vehicle floor panel design featuring a fiber-reinforced resin with a plurality of recesses and ribs, where the ribs connect adjacent recesses and are parallel to a straight line linking their centers, providing increased rigidity and distributing forces efficiently, while the recesses are circular in planar view and arc-shaped in longitudinal section to inhibit deformation and weight concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a fiber-reinforced resin is used to make the plate-like body, then strength and stiffness are improved, but thermal characteristics vary with position in the forming die causing deformation during cooling
Solution Approach 1:
The invention introduces ribs with different thicknesses at different locations to compensate for thermal characteristic variations. Specifically, ribs having a larger thickness are provided at positions where the heat transfer coefficient is smaller, while ribs with smaller thickness are provided where the heat transfer coefficient is larger, achieving uniform cooling and preventing warping deformation
Solution Approach 2:
The invention changes the thickness parameter of ribs based on their position in the forming die. By adjusting the rib thickness according to the local heat transfer coefficient, the cooling rate is equalized across different positions, preventing thermal deformation during the forming process
2Weight of moving object
If the plate thickness is reduced to decrease weight, then weight is reduced, but rigidity and resistance to deformation under collision loads deteriorate
Solution Approach 1:
The invention divides the floor panel into multiple regions by introducing ribs that connect adjacent recesses. This segmentation creates a structured framework that enhances rigidity and load distribution, allowing the panel to maintain high strength even with reduced overall plate thickness
Solution Approach 2:
The invention uses fiber-reinforced resin as a composite material that provides high strength-to-weight ratio. Combined with the rib structure, this composite material enables the floor panel to achieve both weight reduction and maintained rigidity under collision loads
Data Source
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AI summary
To provide a vehicle floor panel having a certain rigidity and being less prone to deformation during manufacturing and deformation when the vehicle floor panel installed in a vehicle is subjected to loads in various directions from outside the vehicle. A vehicle floor panel includes a floor panel main body made of a fiber-reinforced resin, a plurality of recesses 23-1 to 23-7 protruding on one of a lower surface 22 and upper surface of the floor panel main body and depressed on the other of the surfaces and arranged by being spaced apart from one another, and ribs 24-1 to 24-12 connecting two adjacent ones of the recesses on the one of the surfaces of the floor panel main body.