The authors: D. S. Kiva, G. A. Krivov, V. F. Sementsov, A. G. Grebenikov, V. A. Matvienko, E. T. Vasilevsky, A. M. Gumenny

Reviewer: Dr. Tech. sciences, prof. S.A. Bychkov

The results of a study of the influence of constructive-technological factors on the fatigue life of structural elements of an airframe are presented. Effective methods and means have been developed to ensure a given durability of structures in the area of functional openings.

For engineers and scientific and technical workers of the aviation industry enterprises, masters, graduate students involved in the problems of ensuring the durability of the aircraft glider design.

C O N T E N T S

Chapter 1. ANALYSIS OF THE CONSTRUCTIVE-TECHNOLOGICAL METHODS OF ENSURING THE DURABILITY OF POWER ELEMENTS OF PLANE PLANE WITH FUNCTIONAL HOLEES

1.1. General requirements for ensuring the fatigue life of the power elements of an airframe of a transport category aircraft 1.2. The influence of design factors on the durability of the power elements of the airframe with functional holes 1.3. Analysis of structural and technological methods for increasing the fatigue life of the power elements of an airframe in the area of ​​functional openings 1.4. Technological methods for processing the zone of functional holes in the power elements of an airframe 1.5. Methodology for the analysis of the effect of thickening of the vertical stringer shelf and barrier compression on the characteristics of the local stress-strain state and the durability of the wing panel in the area of ​​the holes for the flow of fuel

Chapter 2. INFLUENCE OF PROCESSING METHODS ON THE CHARACTERISTICS OF THE STRESSED-DEFORMED STATE OF THE STRUCTURAL-STRENGTH ELEMENTS OF THE PLANER IN THE HOLE ZONE 2.1. The influence of methods and parameters of strip processing in the area of the holes on the characteristics of the local VAT 2.2. The influence of methods and processing parameters of the zone of the holes for the flow of fuel on the VAT stringers 2.3. Analysis of the effect of the consistent use of burnishing and barrier crimping of structural elements with a system of holes on the characteristics of their local SSS in tension

Chapter 3. EXPERIMENTAL STUDIES OF THE INFLUENCE OF PROCESSING METHODS ON THE FATIGUE DURABILITY OF STRUCTURAL ELEMENTS WITH FUNCTIONAL OPENINGS 3.1. Study of the static strength of structural elements with a system of holes 3.2. Experimental studies of the fatigue life of a strip with a hole and a system of holes 3.3. An experimental study of the influence of processing methods on the fatigue life of strips with three holes 3.4. Methodology for predicting the influence of structural and technological parameters on the fatigue life of structural elements with stress concentrators during their cyclic tension 3.5. An experimental study of the influence of processing methods on the fatigue life of structurally similar specimens of stringers with holes for fuel flow 3.6. Experimental studies of the effect of the consistent use of burnishing and barrier crimping on the fatigue life of structural elements of stretched wing panels in the area of ​​functional openings

Chapter 4. TECHNOLOGY AND MEANS OF EQUIPMENT PROCESSES FOR PROCESSING THE HOLE ZONE FOR FUEL FLOW 4.1. Technological accuracy and stability of processing processes 4.1.1. Technological accuracy and stability of the rolling process 4.1.2. Technological accuracy and stability of the burning process 4.1.3. Technological accuracy and stability of the process of barrier compression 4.2. Technology of processing OPT by rolling 4.3. The technology of processing OPT by burnishing 4.4. Technology of processing OPT by the method of barrier compression 4.5. Comparative evaluation of the effectiveness of processing methods