Glass Breaking -- What causes this characteristic fracture pattern?

[Moayd Shagaf]

Will, I have weird question , when the glass is broken for example, its take some shap like

So Why this happen , I mean if i throw a ball on glass does the weakest place are broken ,does this right?

 

[berkeman]

Wow, a quick Google search turns up this paper that gives you lots of info:

https://link.springer.com/content/pdf/10.1007/s11668-011-9432-5.pdf