Panel With Interlocking Protrusions And Recesses For Rigidity

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Solution Overview

Problem

Conventional panels with protrusions and recesses in a zigzag pattern fail to adequately increase bending and torsional rigidity while reducing weight due to continuous flat sections that influence the panel's rigidity and weight distribution.

Innovation Solution

A panel design where protrusions and recesses are alternately arranged with their peripheries surrounded by the opposite features, creating a three-dimensional effect that enhances bending and torsional rigidity, and includes features like hexagonal and triangular shapes, inclined surfaces, and bridges to distribute forces effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If protrusions and recesses are arranged in a zigzag pattern with continuous flat sections, then the panel structure is formed, but the bending rigidity and torsional rigidity cannot be sufficiently increased and weight cannot be sufficiently reduced

Engineering Contradiction:
Improvebending rigidityVSAvoidpanel weight
Core Design Contradiction:
StrengthVSWeight of stationary object

Solution Approach 1:

The patent divides the panel surface into discrete protrusions and recesses arranged in a grid pattern, eliminating continuous flat sections. This segmentation creates isolated structural features that enhance rigidity through localized reinforcement without the weight penalty of continuous strengthening structures.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces a third dimension by creating protrusions and recesses that extend perpendicular to the panel surface. This vertical dimension adds structural complexity and rigidity while maintaining a relatively flat overall profile, thereby increasing bending and torsional rigidity without proportionally increasing weight.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Weight of stationary object

If protrusions and recesses are arranged in a zigzag pattern with continuous flat sections, then the panel structure is formed, but the weight cannot be sufficiently reduced

Engineering Contradiction:
Improvepanel weightVSAvoidtorsional rigidity
Core Design Contradiction:
Weight of stationary objectVSStrength

Solution Approach 1:

By segmenting the panel into discrete protrusion-recess units arranged in a grid, the design achieves torsional rigidity through the distributed pattern of these features rather than through continuous flat sections, enabling weight reduction while maintaining structural strength.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The panel creates a composite structure combining flat plate material with three-dimensional protrusion-recess features. This composite configuration provides torsional rigidity through the geometric arrangement of features rather than through continuous material reinforcement, achieving strength-to-weight improvement.

Inventive Principle:
Principle #40Composite materials

Data Source

PatentUS8932700B2Panel
Publication Date: 2015.01.13 NIPPON STEEL CORPORATION
  • US8932700B2 patent drawing
  • US8932700B2 patent drawing
  • US8932700B2 patent drawing

AI summary

A panel which includes, among protrusions protruding from a predetermined reference surface, flat sections being flush with the reference surface, and recesses being recessed from the reference surface, the protrusions, and the flat sections or recesses, wherein; when the panel includes the flat sections, the entire periphery of each of the protrusions is surrounded by the flat sections, and the entire periphery of each of the flat sections is surrounded by the protrusions, while when the panel includes the recesses, the entire periphery of each of the protrusions is surrounded by the recesses, and the entire periphery of each of the recesses is surrounded by the protrusions.