Scutoidal Honeycomb Core Geometry for Lateral Energy Absorption
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Solution Overview
Problem
Standard hexagonal honeycomb geometries have limited capability in absorbing energy under lateral loading conditions, especially when significant tangential components are present, leading to potential risks during lateral loads.
Innovation Solution
A new scutoidal cell geometry is introduced, comprising a sub-cell with a longitudinally extending first panel, a second panel, and internal diagonal panels that form a periphery of an open space, enhancing energy absorption under lateral loading while maintaining high axial energy absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If standard hexagonal honeycomb geometry is used, then axial energy absorption is maintained, but lateral energy absorption capability is limited
Solution Approach 1:
The cell is divided into multiple panels (first panel, second panel, third panel, fourth panel, fifth panel) that form a scutoidal geometry with diagonal members. This segmentation creates additional load paths and structural elements that specifically enhance lateral energy absorption while maintaining axial performance, resolving the contradiction between improved lateral strength and geometric complexity.
Solution Approach 2:
The scutoidal cell geometry introduces asymmetric diagonal members and non-uniform panel arrangements that provide enhanced lateral stiffness and energy absorption in directions where traditional hexagonal cells are weak. The asymmetric design targets specific loading conditions without compromising axial performance.
2Strength
If standard hexagonal honeycomb geometry is used, then manufacturing simplicity is maintained, but lateral strength under tangential loading is insufficient
Solution Approach 1:
The cell structure is segmented into discrete panels and diagonal members that can be manufactured separately and assembled. This segmentation allows for optimized manufacturing of individual components while achieving the complex scutoidal geometry required for enhanced lateral strength under tangential loading.
Solution Approach 2:
The design adds diagonal members and internal panels that create three-dimensional load paths within the cell structure. This dimensional enhancement provides lateral strength against tangential forces while the modular panel construction maintains manufacturing feasibility through standardized component assembly.
3Strength
If conventional honeycomb panel configuration is used, then weight minimization is achieved, but energy absorption under lateral loading is small
Solution Approach 1:
The honeycomb core is segmented into scutoidal cells with diagonal members and multiple panels that create efficient load paths for lateral loading. This segmentation allows material to be strategically placed where it provides maximum energy absorption benefit, improving lateral strength without proportionally increasing overall material quantity.
Solution Approach 2:
The scutoidal cell geometry applies local quality enhancements by concentrating structural elements (diagonal members, internal panels) in specific regions where lateral loading occurs. This localized reinforcement provides enhanced energy absorption under lateral loading while minimizing additional material usage compared to uniform thickening of the entire structure.
Data Source
AI summary
The present disclosure relates to cell geometries for use in panel designs which may allow for an increased amount of energy absorption under lateral loading, as well as axial loading. The cell geometry that may withstand more energy from different angles as compared to standard honeycomb geometry. This cell geometry may be employed as a core of repeating cells to provide an increased amount of energy absorption under lateral loading in addition to energy absorption under axial loading. The cell geometry may be composed of a portion having a squared cross-section, but with internal diagonal walls, which are neither fully parallel nor perpendicular to the cell axis. This configuration is believed to possibly increase stiffness and energy absorption of a resulting core in the lateral direction.