Multi-layer Panel Reinforcement for Vehicle Slope Rigidity
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Solution Overview
Problem
Existing vehicular slope devices face challenges in reinforcing specific areas for increased rigidity and strength, as they require uniform cross-sectional shapes for extrusion, limiting the placement of ribs and compromising strength at boundaries when using multi-layer structures.
Innovation Solution
A multi-layer panel comprising a core panel with standing and flat portions, sandwiched by face plates and reinforced with a beam member having a rectangular cross-section, which allows for enhanced rigidity and strength distribution without reducing the effective surface area, and includes features like protruding portions for accurate positioning and component mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform cross-sectional shape is used for extrusion, then the floor member can be manufactured by extrusion, but it is impossible to limit rib placement only to necessary areas and impossible to provide ribs in directions crossing the extrusion direction
Solution Approach 1:
The floor member is divided into multiple extruded sections (first floor member, second floor member, etc.) that can be manufactured separately with uniform cross-sections, then connected to form the complete structure. This allows ribs to be strategically placed only in sections where reinforcement is needed while maintaining extrusion manufacturing benefits for each segment.
Solution Approach 2:
The invention combines extruded aluminum alloy floor members with separately manufactured rib structures and connection components to create a composite assembly. This allows the rib placement and orientation to be optimized for structural strength while the extruded sections maintain manufacturing simplicity.
2Weight of stationary object
If a multi-layer structure with corrugated plate is used, then weight and cost are suppressed, but cutting out the corrugated plate to fit core material deteriorates strength and rigidity at the boundary
Solution Approach 1:
The corrugated plate is designed with locally varied properties - the standing portions provide structural support and connection surfaces, while the flat portions provide load-bearing surfaces. This local differentiation allows the structure to maintain strength at boundaries without requiring material removal, as each area has the specific geometry needed for its function.
Solution Approach 2:
The invention transitions from a two-dimensional flat plate approach to a three-dimensional corrugated structure with standing and flat portions. This dimensional change allows the core material to be sandwiched between face plates at specific locations without cutting the corrugated plate, maintaining boundary strength while achieving weight reduction.
3Strength
If ribs are added to increase rigidity and strength, then the floor member strength is improved, but the cross-sectional shape becomes non-uniform making extrusion manufacturing impossible
Solution Approach 1:
The floor member is segmented into multiple extruded sections that can each be manufactured with uniform cross-sections suitable for extrusion. Ribs and reinforcement features are then added as separate components or through post-extrusion processing, allowing strength enhancement without compromising the extrusion manufacturing process for the main structure.
Data Source
AI summary
A multi-layer panel is provided, which may eliminate local portions having low strength and low rigidity and may suppress a stress concentration to increase rigidity and strength. The multi-layer panel includes a core panel; a pair of face plates sandwiching the core panel from both sides; and a beam member. The core panel has a standing portion extending in a direction intersecting with a surface of the multi-layer panel, and a flange formed in a manner of extending from a most outside end of the standing portion along a first one of the face plate. The beam member includes a portion with the rectangular cross section disposed so as to clamp the flange of the core panel with the first face plate.