What Causes a Car Windshield to Crack?

[VanAbigail]

Car windshields crack due to the following reasons: During the processing of laminated glass, heating and subsequent cooling create internal tension and surface pressure. These forces remain stable when balanced, but can cause cracking when unbalanced. Additionally, if a car windshield exposed to intense sunlight comes into sudden contact with cold water, the extreme temperature variation may lead to glass breakage. The front windshield is the largest piece of glass on a vehicle, serving to shield against wind and rain while protecting occupants from flying debris and other projectiles. While laminated windshields (comprising two or more glass layers bonded with polymer interlayers) offer enhanced shatter resistance, spontaneous cracking can still occur, potentially obstructing visibility and compromising driving safety.