Crash Test Dummy Head Assembly Facial Insert
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Solution Overview
Problem
Current foam inserts in crash test dummies deteriorate quickly due to physical damage during collision testing, leading to inconsistent biomechanical responses and reduced repeatability, limiting their suitability for vehicle safety evaluations.
Innovation Solution
A head assembly for crash test dummies featuring a facial insert with a honeycomb design made of solid materials and defined cell structures, allowing for adjustable force versus deflection properties and improved biomechanical response, enhancing durability and human-like interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If foam material is used for facial insert, then biomechanical response is achieved, but durability and repeatability deteriorate due to physical damage during impact testing
Solution Approach 1:
The patent changes the material parameters from foam to solid materials (acrylic, polycarbonate, or aluminum) with specific mechanical properties. The solid materials have different density, strength, and elasticity parameters that enable them to withstand repeated impact forces without the degradation experienced by foam materials, thereby improving both reliability and service life
Solution Approach 2:
The facial insert is constructed as a composite structure combining multiple solid materials (acrylic, polycarbonate, aluminum) with different mechanical properties. This composite approach allows optimization of both durability for repeated testing and biomechanical response characteristics, resolving the contradiction between reliability and service life
2Duration of action of stationary object
If solid materials with defined cell structures are used, then durability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs solid materials with defined cell structures (porous or honeycomb configurations) that provide both durability and controlled mechanical response. These cell structures are integrated into the solid material matrix, creating a configuration that enhances structural integrity for repeated testing while the cell geometry itself can be manufactured using standard molding or machining techniques
Solution Approach 2:
The facial insert is divided into multiple sections or layers with different cell structures and material compositions. This segmentation allows each section to be optimized for specific mechanical properties while being manufactured separately and then assembled, reducing overall manufacturing complexity compared to creating a single monolithic structure
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 new facial insert design provides consistent and repeatable biomechanical responses, enabling more accurate evaluation of potential head injuries during vehicle crash testing and accommodating various force conditions, thus improving the reliability of crash test dummies.
Implementation Method 1
a facial insert disposed between the skull and the head skin and having a plurality of defined cell structures to achieve a biomechanical response
Data Source
AI summary
A head assembly for a crash test dummy includes a skull, a head skin disposed over the skull, and a facial insert disposed between the skull and the head skin and having a plurality of defined cell structures to achieve a biomechanical response that provides for evaluation of potential head injuries during vehicle crash testing.