Board Connecting Structure for Crack-Free Low-Elongation Sheets
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Solution Overview
Problem
Decorative metal boards with ink-spray-coated pattern layers require high elongation to prevent cracking during bending, posing a challenge when using sheets with low elongation.
Innovation Solution
A structure with a connecting part comprising beam portions and support portions that suppress in-plane deformation on one surface by allowing bending deformation on the opposite surface, preventing stress and cracking in sheets with low elongation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sheet with high elongation is used to prevent cracking during bending, then the sheet can accommodate bending deformation, but sheets with low elongation cannot be used
Solution Approach 1:
The board is divided into a connecting part and other parts, with the connecting part specifically designed to accommodate bending deformation through its beam portion structure, isolating the deformation demand from the sheet-covered surfaces
Solution Approach 2:
The beam portions extend in a direction different from the connecting direction, creating a three-dimensional structure that allows bending deformation to occur primarily in the thickness direction of the board rather than in the plane of the sheet, thereby reducing in-plane deformation demands on the sheet
2Shape
If the board undergoes bending deformation, then the board can be shaped, but in-plane deformation occurs on the sheet surface causing cracks
Solution Approach 1:
The connecting part is segmented into multiple beam portions that are positioned between the first and second parts, with each beam portion supported at different positions to control the deformation pattern and minimize in-plane deformation on the sheet surface
Solution Approach 2:
The beam portions extend in a direction different from the connecting direction, enabling the connecting part to undergo bending deformation primarily in the board's thickness direction rather than in the sheet's plane, thereby preventing crack formation in low-elongation sheets
Data Source
AI summary
A structure includes a board, and a sheet attached to one surface of the board. The board includes a first part, a second part, and a connecting part that connects the first part and the second part and is configured to allow bending deformation on the other surface side of the board. The connecting part includes one or more beam portions that is positioned between the first and second parts and extends in a direction different from a connecting direction in which the first and second parts are connected via the connecting part, one or more first support portions that support the corresponding beam portion from the first part side at one or more first positions, and one or more second support portions that support the corresponding beam portion from the second part side at one or more second positions different from the one or more first positions.