Non-Newtonian Fluid Pusher for Adaptive Side Impact Force Distribution
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Solution Overview
Problem
Current side impact safety features in vehicles do not effectively distribute force based on the size of the occupant, potentially leading to inadequate protection during collisions.
Innovation Solution
A door assembly with a pusher containing a non-Newtonian fluid that adjusts its stiffness based on the occupant's size, distributing force more effectively by transferring more force to larger occupants and less force to smaller ones, thereby reducing injuries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-stiffness pusher is used in the door assembly, then the structure is simple and easy to manufacture, but it cannot effectively distribute force based on occupant size, leading to inadequate protection for both smaller and larger occupants
Solution Approach 1:
The pusher utilizes a non-Newtonian fluid whose viscosity parameter changes dynamically in response to applied stress. During a side impact, the fluid's viscosity increases with the force applied, allowing the pusher to adapt its stiffness automatically. This resolves the contradiction by providing adaptability through parameter change rather than through complex mechanical adjustments or multiple components.
Solution Approach 2:
The non-Newtonian fluid in the pusher automatically adjusts its properties in response to the impact force without requiring external control systems, sensors, or power sources. The fluid self-regulates its viscosity based on the applied stress, enabling the pusher to adapt to different occupant sizes and impact conditions autonomously, thus avoiding additional complexity.
2Reliability
If more force is transferred to larger occupants during side impact, then protection effectiveness improves for larger occupants, but the risk of injury increases for smaller occupants who receive less force
Solution Approach 1:
The non-Newtonian fluid's viscosity parameter changes continuously based on the impact force magnitude. For larger occupants who generate greater impact forces, the fluid becomes more viscous and transfers more force, providing adequate protection. For smaller occupants with lower impact forces, the fluid remains less viscous and transfers appropriate force levels, preventing over-protection or injury. This dynamic parameter adjustment resolves the contradiction between reliability and harmful factors.
3Adaptability or versatility
If traditional side impact safety features (frame, seatbelts, airbags) are used, then basic protection is provided, but force distribution cannot be optimized based on occupant characteristics
Solution Approach 1:
The door assembly's pusher contains a non-Newtonian fluid that automatically senses and responds to impact conditions without requiring integration with vehicle sensors, control units, or power systems. The fluid self-adjusts its force distribution characteristics based on the physical parameters of the impact event and occupant, providing occupant-specific protection while avoiding the complexity of electronic control systems.
Solution Approach 2:
The pusher utilizes a fluid-based mechanism (non-Newtonian fluid) to achieve adaptive force distribution, leveraging fluid dynamics principles rather than mechanical linkages or electronic systems. This hydraulic approach provides smooth, continuous adaptation to different occupant sizes and impact conditions while maintaining structural simplicity and reliability.
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 solution reduces injuries in side impacts by dynamically adjusting the force distribution according to the occupant's size, enhancing safety features like airbags and seatbelts.
Implementation Method 1
the pusher 36 contains a non-Newtonian fluid 40
Implementation Method 2
the energy-absorbing characteristics of the pusher 36 varies based on the size of the occupant
Data Source
AI summary
A door assembly includes a door and a pusher. The door defines a cavity. The pusher is fixed to the door in the cavity, and the pusher contains a non-Newtonian fluid. The door assembly may be installed in a vehicle. Because the pusher contains a non-Newtonian fluid, the pusher distributes force from the impact to an occupant in a manner that depends on a size of the occupant.