What are the causes of car glass breakage?
2 Answers
Car glass breakage can be attributed to the following reasons: 1. Poor tempering process: Tempered glass inherently has a self-explosion rate of about 0.3% due to quality issues, which strictly speaking indicates a problem with the glass quality. 2. Uneven stress distribution: If the glass is installed without leaving sufficient edge clearance, it may expand when heated and press against the metal frame, leading to uneven stress distribution and ultimately causing the glass to crack. 3. Deformation: During the process of applying window film, if the glass is not heated evenly and a heat gun is used to shape the film, localized heating can cause uneven thermal expansion stress and deformation, resulting in glass breakage.
That day while I was driving on the road, the windshield suddenly shattered, and the loud cracking sound was absolutely terrifying. Upon careful reflection, there are several possible causes: the most common is when a stone flies up and hits the glass at high speed, the sudden pressure can cause it to break; extreme temperature differences can also lead to shattering, such as blasting the AC on a hot day while the car is baking in the sun, creating a significant temperature difference between the inside and outside of the glass that can cause it to crack; issues with the car's frame can also be a trigger—like my car, which had some prior deformation, causing the glass to endure extra stress over time until it couldn’t take it anymore. Additionally, aging glass or manufacturing defects can be hidden hazards, as exposure to wind and sun makes the material brittle. Once shattered, the fragments can injure people or obstruct vision, so it’s advisable to stop and check immediately. Regular cleaning and inspecting for scratches can help prevent such incidents.
