Erichsen test is concerned with ________.
hardness determination
bending test
cupping test
impact test
cupping test
Erichsen test is concerned with cupping test.
Hence, the correct option is (C).
&Key Points:-
Ericson cupping test for sheet metal :
●Erichsen cupping test in sheet metal is performed by forcing a hemisphere punch into the metallic sheet until a crack appears and at that point, measuring the depth of cup as the circular scale shows.
● Harder the metal, with fine grain structure, will result in lesser depth and fine shape of a cup.
●On the other hand, ductile metal, with coarse grain size, results deeper indent with a roughcup shape.
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