Like broken glass in slow-motion: stunningly beautiful video
Slow motion video: as cracks appear in the glass
When a stone hits the windshield on the road, any motorist ekaet heart. Nobody wants to chip on the smooth glass surface, he after some time can become a crack. These clearly negative aspects we think about one thing: why automakers can’t make a more durable glass? Why do we have to suffer with the repair and replacement of glasses, even after meeting with a small pebble on the road?
In fact, if we dig a little deeper into the subject matter, of course will be that modern composite (double – and triple-duplex – triplex) and tempered automotive glass are almost a kind of transparent armor. To break such a modern windshield is extremely difficult, and the energy of collisions must be high enough to fly at this speed this seemingly small pebble in an unprotected driver’s head injury, it would be difficult to avoid.
Especially evident comparing the two types of breaking glass, ordinary tempered and on the video. Usually glass window gently hit, it will break into large dangerous pieces in the blink of an eye, while heat-treated glass will take a much more hard hitting (its strength is 5-6 times higher than conventional glass), and even when crack, the pieces will be safe (when breaking, it breaks into small fragments with blunt edges).
The fact that the thermally treated glass (even if it is single layer) on surface layers are formed residual compressive stress that gives the glass a high mechanical strength and a very nice view of the destruction on the high-speed video camera.
You can see it in the video, where the 3.30 minute in slow-motion beat and ordinary glass compared with the result of a collision of the ball with tempered glass, which is filmed at speeds of 10 million frames per second (5.48 minute video). Here is how arise, spread and grow cracks in the glass – a fascinating spectacle, like hundreds of lightning bolts struck at once. Take a look: