Restrain System Biomechanics Flashcards
Explain Process of developing Restraints.
Explain the Circle of Life
What happens in a Frontal Crash with an Unrestrained Occupant?
Seat Belt Biomechanics – Fundamental Mechanical Concepts?
Seat Belt Biomechanics – Fundamental
Concepts
Restraint – Mechanical
- Maximize the time which the restraint force is applied
- Maximize the distance travelled over the ground by the occupant
- Maximize the force below injourious level
Seat Belt Biomechanics – Fundamental Anatomical Concepts?
Restraint – Anatomical
- Minimize local deformation and rate of deformation
- Maximize the area of the restraining force
- The magnitude of the restraining forces should not exceed the force tolerance of that region
What are the Fundamental Restraint Kinematics concerning seat belt.
Principle of Buckle Pretensioner?
What is a Pyrotube Retractor?
Comparison of Belt System With and Without Pretensioner.
Explain Shoulder Belt Force Limitor.
What is the Effect of Belt Force Limitation?
Adaptive Force Limiting?
What is the Effect of Early Coupling?
Ideal coupling?
Effect of Pre-Pretensioning?
Effect of slack on initial time of crash - 1.5 s prebrake.
Inflatable Belt – Contact Pressure on Chest?
Explain the geometry for Inflatable Belts.
Chest Deflections with different dummies and belts.
Impact of different belt geometires on Chest Excursions?
What is IARV?
Injury Assessment Value (IARV) is a human response level below which
a specified significant injury is unlikely to occur for a given individual
Explain The Negative Chest Deflections recorded in these tests areassociated with one of two
potential phenomena concerning 4-Point Belt.
4-Point Belt
The Negative Chest Deflections recorded in these tests are
associated with one of two
potential phenomena:
1) a straightening of the spine with a concomitant
change in rib angle causing expansion of the
ribcage (ribs angled down have a smaller depth
than ribs that are horizontal)
2) the inertial effect of the organs impacting the ribs
during the test, as the shoulders and pelvis
Explain Integrated Booster Cushion.
Explain Inflatable Restraint Biomechanics
Explain the Inflatable Restraint Biomechanics
Head and Face Contact Mitigation
Explain Inflatable Restraint Biomechanics
Load Sharing, Force Distribution, and Work
