2006-06-16 21:03:09 · 3 answers · asked by amrita_dinakar 1 in Science & Mathematics ➔ Engineering
Charpy and Izod tests have very specific set-ups and procedures. You couldn't just do a Charpy or Izod test "on a car."
As has been said, the notch causes stress concentrations which result in the fracture of the sample. Without the notch, the sample will just deform and not fracture.
2006-06-18 16:11:27 · answer #1 · answered by punfun25 2 · 3⤊ 2⤋
The charpy notch test is used to compare the brittleness of small metal samples. The samples are subjected to an impact with a known amount of energy (e.g., a released pundulum). The notch produces a "stress riser" that will concentrate stress in the notch and produce sample failure only at the notch. This makes results for a given metal (alloy or heat treatment) highly repeatable so that various metal can then be compared. Without the notch, test results (energy absorbed) would be far less reliable.
2006-06-17 11:24:05 · answer #2 · answered by Kes 7 · 0⤊ 0⤋
to test stresses at the knotch
in some cases where stresses may be concentrate in cars for example
2006-06-17 06:13:05 · answer #3 · answered by koki83 4 · 0⤊ 0⤋