brake drum of a truck, crack with interfacial bonds in end zones, limit thermoelastic state.

The problem of temperature stresses in a brake drum weakened by a crack during vehicle braking is considered. It is assumed that during repeated braking in area of actual contact of the elements of friction pair of the vehicle braking system as a result of uneven heating, material defects (burns, thermal spots and microcracks) are formed. A mathematical description of the limit state in a drum weakened by crack with interfacial bonds in end zones during vehicle braking has been carried out. According to the crack re-sistance criteria, relations for determining the limit value of intensity of the heat effect at which in the brake drum crack growth occurs are obtained.

Askerov Sahib Azer ogly ,

e-mail: :   sahibesgerov77@gmail.com,   Аssistant,   Azerbaijan   Technical   University,   Baku, Azerbaijan.