Zarutskyy A. Predicting of aircraft wing panels durability with pre-compression zone of holes for fuel overflowing by local stress-strain state

Object - fatigue resistance elements of aircraft structures with preliminary compression of the material in the area of the holes under cyclic loading. The aim is the development of durability calculation method for the aircraft wing panels with the pre-compression of the material in the area of holes overflowing fuel. Methods that used are method of durability calculation by the local stress-strain state (SSS) and the nominal stress, finite element method, tensometric method. Practical outcomes: this method gives the opportunity to decrease the amount of faatigue tests during the design process; to use calculation for selection of rational combinations of design and tehnological factorsensouring service life. These calculations utilize the fatigue and cyclic deformation properties of material. Newelty: durability calculation method for the aircraft wing panels with the pre-compression of the material in the area of holes overflowing fuel; а new approach to accounting for the residual stresses in the formation of local cycles of deformation of the material at the point of maximum concentration; first experimental and theoretical value obtained by the durability of structural elements with pre-compression of the material in the area of the openings with irregular loading. The degree of implementation - the main results of the dissertation are used at the State Enterprise "Antonov" in the educational process of the National Aerospace University "Kharkiv Aviation Institute". Industry sector - aircraft manufacturing.