Functionally Graded Lattice Padding for Helmet Impact Absorption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current helmets lack customization and are not optimized for specific impact protection, with standard padding systems failing to effectively absorb and control low-velocity impacts, particularly in terms of comfort and weight distribution.
Innovation Solution
A functionally graded structure comprising multiple lattice structures with varying geometries and compression response properties, arranged in a stack or nested configuration, providing a customizable and optimized impact absorption system between the outer shell and inner liner of a helmet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard open cell layered padding is used in helmets, then manufacturing is simple and cost-effective, but impact absorption performance for low-velocity impacts is insufficient
Solution Approach 1:
The padding is divided into multiple discrete lattice structures with different geometries and compression response properties, arranged in a stacked configuration. Each lattice structure segment provides specific impact absorption characteristics, and the segmented design allows for optimized performance across different impact scenarios while maintaining manufacturing feasibility through modular assembly
Solution Approach 2:
Different regions of the padding contain lattice structures with locally optimized geometries and material properties tailored to specific impact absorption requirements. The lattice structures vary in cell size, wall thickness, and connectivity patterns to provide gradient compression responses that match the distribution of impact forces across different areas of the helmet
2Adaptability or versatility
If a one-size-fits-all approach is used for helmet padding, then manufacturing and inventory management are simplified, but customization for different head shapes and sizes is lost
Solution Approach 1:
The lattice structure padding incorporates adjustable and reconfigurable elements that allow the same basic padding unit to adapt to different head shapes and sizes. The modular lattice structures can be selectively activated, repositioned, or adjusted in density to provide customized fit and performance for individual users while maintaining a standardized manufacturing process for the base components
3Adaptability or versatility
If helmet padding is designed for general impact protection, then broad applicability is achieved, but optimization for specific applications and impact types is reduced
Solution Approach 1:
The lattice structure padding employs spatially varying geometries and material properties that are locally optimized for specific impact types and directions. Different lattice configurations are strategically placed in regions corresponding to application-specific impact risks, allowing the same padding system to provide tailored protection for different sports or military applications through selective activation or configuration of specific lattice zones
4Reliability
If uniform thickness and geometry are used throughout the padding, then manufacturing is simplified, but impact absorption and comfort are not optimized
Solution Approach 1:
The padding is segmented into multiple lattice structures with varying thicknesses and geometries arranged in a stacked configuration. Each segment is designed with specific dimensional characteristics optimized for its location and function, creating a gradient structure that provides superior impact absorption and comfort compared to uniform designs while maintaining manufacturing simplicity through modular production of standardized segments
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The functionally graded structure enhances impact absorption and comfort by varying stiffness and thickness throughout the padding, allowing for improved energy dissipation and customized fit, addressing the limitations of standard helmets in low-velocity impact protection.
Implementation Method 1
a first lattice structure with a first geometry has a first compression response property and a second lattice structure with a second geometry has a second compression response property
Implementation Method 2
optimized geometries for impact absorption, such as low velocity impact energy absorption
Data Source
AI summary
A functionally graded structure for a protective device includes a plurality of lattice structures including at least a first lattice structure having a first geometry and a second lattice structure having a second geometry. The first lattice structure with the first geometry has a first compression response property and the second lattice structure with the second geometry has a second compression response property that is different from the first compression response property.