VIBRATION DURABILITY OF BIMETAL BEAMS PRESTRESSED BY STRETCH FORMING OF A THIN WALL
Researches of vibration durability of the bimetallic beams which are prestressed by the longitudinal stretch forming of a thin wall are given. It is established that a shaping of the bent elements made of steel of various durability together with the prestressed of a design are the defining prerequisite of their endurance increase. It is proved that plastic deformations cover only 4% of the total frontal area of a wall. On this basis the conclusion is drawn about the prevailing work of material of belts and walls in an elastic area and about the lack of influence of plastic deformation areas on endurance of the design.