Fracture and Fatigue in Materials

Lesson 8 of 10 • 3 upvotes • 11:59mins

Akhildev V P

Fracture is a phenomena in materials, which occurs due to separation of materials or objects into two or more parts. It occurs initially with a crack and then followed with crack initiation. So this crack propagation decides what type of a fracture it is. That is ductile fracture or brittle fracture. Ductile fracture has plastic deformation in it, and Brittle fracture has no plastic deformation. Described about stages of crack propagation in ductile fracture. Explained about Ductile to Brittle transition. Then Explained the next section that is Fatigue in materials.Simply Failure of materials due to cyclic loads. Cyclic loads be low cyclic and high cyclic. And also repeated stress cycles, reversed stress cycle and random stress cycle. Endurance limit and S-N curve were very important for a material of fatigue strength. Also I gave details about methods to improve fatigue life of material.