crumple zone

US /ˈkrʌm.pəl ˌzoʊn/
UK /ˈkrʌm.pəl ˌzoʊn/
"crumple zone" picture
1.

an area of a vehicle that is designed to crumple in a collision, absorbing the impact and protecting the occupants

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Modern cars are built with a crumple zone to enhance safety during crashes.
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The engineer explained how the crumple zone works to absorb kinetic energy.
:
impact absorption zoneenergy absorption zonedeformation zone
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crumplezonetime zoneneutral zoneend zonedrop zonered zone