Why don't we use fillets when making buildings and houses (i.e why do we leave the edges sharp?)? Does stress concentration factor not matter in making structures?
I am talking about the building like this-->
I know this edge is not
highly stress concentrated(only the atmospheric pressure is acted on these edges, which is easily bearable by this building.) but assume the time of any natural disaster, at that time these type of edges would be more likely to fail.And making the edges round doesn't affect the cost much.I think.
NOW ANOTHER EXAMPLE.
This is also stress concentrated.As we climb the stairs there will definitely some forces will act.