howseatbeltswork安全帶工作原理-免費(fèi)閱讀
【正文】 How Seatbelts Work Introduction ? According to NHTSA seatbelts save 13,000 lives in US each year ? 7,000 US car accident fatalities could have been avoided if victims had been wearing belts ? Seatbelts reduce the risk of death for a front seat car occupant by about 50 percent Seatbelts ? Seatbelt – spreads the crash forces across stronger parts of the body to minimize injury. ? Consists of lap belt and a shoulder belt ? Belts extend across the pelvis, rib cage and shoulder. ? Force is not concentrated in a small area, so injury is reduced. Crashworthiness ? Crumple zones – front and
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