Shear Thickening Impact Protection System
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Solution Overview
Problem
Traditional impact protection systems, such as helmets, are often heavy, cumbersome, and uncomfortable for physical activities due to their rigid construction, while lighter alternatives provide insufficient protection.
Innovation Solution
A wearable impact protection system comprising an inner layer of a first shear thickening material, an outer layer of a second shear thickening material, and an intermediate deformable layer, which distributes impact forces effectively through a combination of material properties and structural features like honeycomb structures and surface features, allowing for flexibility and enhanced protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional rigid outer shell and deformable material are used, then impact protection is improved, but weight and comfort deteriorate
Solution Approach 1:
The patent utilizes shear thickening materials that change their physical properties (from soft and flexible to rigid and protective) in response to impact forces. This dynamic parameter change allows the material to provide high impact protection only when needed, while remaining lightweight and comfortable during normal wear.
Solution Approach 2:
The invention combines shear thickening materials with deformable layers to create a composite structure that leverages the advantages of both material types. The shear thickening material provides impact resistance while the deformable layer absorbs energy, achieving high protection with reduced weight compared to traditional rigid shell constructions.
2Reliability
If traditional rigid outer shell and deformable material are used, then impact protection is improved, but flexibility and comfort deteriorate
Solution Approach 1:
The shear thickening material dynamically changes its parameters based on applied stress. During normal activities, the material remains soft and flexible, allowing full range of motion and comfort. Upon impact, it rapidly transitions to a rigid state to provide protection, thus resolving the contradiction between flexibility and impact protection.
Solution Approach 2:
The protective system transitions from a static rigid structure to a dynamic material that adapts its properties in real-time. The shear thickening material remains flexible during normal wear but becomes rigid when subjected to impact forces, enabling the system to provide protection without compromising flexibility during everyday use.
3Ease of operation
If lighter construction is used, then flexibility and comfort are improved, but impact protection deteriorates
Solution Approach 1:
The shear thickening material provides a dynamic response where the lightweight construction remains flexible during normal use but automatically generates high impact protection when needed. This eliminates the need for heavy permanent protective structures while maintaining both flexibility and adequate impact protection.
4Reliability
If shear thickening materials are used, then flexibility and impact protection are improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines shear thickening materials with deformable layers in a composite structure that can be manufactured using established techniques. This composite approach allows the complex functionality to be achieved through material selection and layering rather than complex manufacturing processes.
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 system provides a high degree of impact protection while maintaining flexibility, making it suitable for various applications without compromising comfort or usability, and can be integrated into various wearable articles like helmets and protective clothing.
Implementation Method 1
an inner layer of a first shear thickening material that faces a wearer in use; an outer layer of a second shear thickening material
Data Source
AI summary
A wearable impact protection system is provided that includes an inner layer of a first shear thickening material that faces a wearer in use, an outer layer of a second shear thickening material and an intermediate deformable layer. In one example the impact protection system is provided in the form of a helmet.