Safety Glass Breaks If Hit By Ceramic

The glass may be able to resist 200kg of evenly distributed load but that is very different from a rock.

Safety glass breaks if hit by ceramic.

It is brittle so it breaks easily. Why will a piece of ceramic break safety glass but a similar sized rock just bounces off. Second the rock may have a hardness similar to the glass. Safety glass is designed to shatter differently from other types of glass to help prevent injuries from flying shards.

When safety glass shatters it is designed to stay in one place keeping all shards together and preventing sharp edges from harming people. This concentrates the force of the hit to a small enough area on the glass that it can scratch and fracture it. I can break a big piece of tempered glass with a little ceramic chip. Spark plugs are made of aluminum oxide ceramic which is exceptionally hard.

Breaking your car s windows in an emergency might be tougher than you think study says. First this is impact not a uniform load. When broken the pieces form razor sharp edges that can cause serious injury. Although effective spark plug fragments will not work all the time.

Normal float glass can be dangerous. The impact of the shard against the glass creates a tiny structural failing which rapidly spreads the tension through the rest of the screen causing it to break. Safety glass is the generic name for glass which has been treated to make it safer than normal glass.