Hi ... what is the difference in functionality between charpy (a simply supported specimen(notched/unnotched) is hit by a swinging pendulum)and gardner test (a simply supported specimen(notched/unnotched) is hit by a vertical free falling mass guided by rails) ....
1.What is the loading pattern in the point of contact between the specimen and the setup?
2.Why fracture pattern varies between the two test setups for similar specimen with same impact velocity, Which parameter is responsible for the variation in fracture type.