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Versatility of Protocols for Resistance Training and Assessment Using Static and Dynamic Ladders in Animal Models
Published on: December 17, 2021
Pretensioner loading to rear-seat occupants during static and dynamic testing.
Katarina Bohman1, Rikard Fredriksson
1a Autoliv Research , Vårgårda , Sweden.
Rear seat pretensioners reduce crash forces but can pose injury risks to children. Balancing pretensioner force and seat belt design is crucial for child safety in vehicles.
Area of Science:
- Automotive safety engineering
- Biomechanics
- Pediatric injury prevention
Background:
- Rear seat pretensioners are increasingly used to reduce seat belt slack.
- Potential injury risks to children from pretensioner deployment require investigation.
Purpose of the Study:
- To assess neck, chest, and abdominal loading on child and adult anthropomorphic test devices (ATDs) during pretensioner deployment and crash phases.
- To evaluate the impact of different pretensioner forces and seating configurations on injury risk.
Main Methods:
- Low-severity frontal sled tests using Hybrid III 3-year-old, 6-year-old, 5th percentile, and 50th percentile ATDs.
- Static pretensioner tests with a Q-series 10-year-old ATD and an abdominal loading device.
- Comparison of ATD loading to injury assessment reference values (IARVs) and age-related injury risk curves.
Main Results:
- Pretensioners reduced head excursion and neck loading in all ATDs during the crash phase.
- Chest deflection exceeded IARV for a 3-year-old ATD with a high-force pretensioner; lower force pretensioners reduced neck and chest loading.
- Static tests showed low risk of abdominal injury for the Q10 ATD.
Conclusions:
- Pretensioner performance varies with deployment phase and seating configuration.
- Optimizing pretensioner force and seat belt geometry is essential for effective child restraint.
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