Mechanical structures supporting our life consist of a variety of metal
Then, will such metal products be NEVER fractured?
Yes, they WILL be fractured anyway.
When and how much does metal fracture happen?
There are 2 main factors to cause metal products to be fractured.
Please see a chart bilow.
1)Corrosion This includes rust as you know.
2)Strength deficiency Fatigue Test is included.
It is said that 80% in causes of fracture accidents happening to mechanical
structures is because of metal fatigue.