Keyword: «stress concentrators»

FINITE ELEMENT MODELING OF STRESS-STRAIN STATE OF SPECIMENS FOR IMPACT BENDING WITH U-SHAPED AND V-SHAPED STRESS CONCENTRATORS

Authors:

Ekaterina Maksimova,

Leonid Prokopev,

Yakov Andreev,

Semen Semenov,

Evgenii Lykin

Determination of impact strength during mechanical impact bending tests is the main practical method for assessing the susceptibility of steel to brittle fracture (GOST 9454-78). The article points out the disadvantages of this test method. Based on finite element modeling, the loading of specimens under impact bending with different types (shapes) of stress concentrator made of structural steel grade St3 was carried out. As a result of the research, a picture of the stress-strain state in the area of stress concentrators was obtained and the edge effect of stress-strain state was shown.

Keywords: finite element method, stress-strain state, impact strength, impact bending, stress concentrators