Study of Isothermal Pneumatic Forming of High-Strength Materials Subject to Energy Theory of Short-Term Creep and Damage

• Published in: Key engineering materials Vol. 746; pp. 36 - 47
• Main Authors: Platonov, Valeriy Ivanovich, Larin, Sergey Nikolaevich, Leonova, Evgeniya Vitalievna
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.07.2017
• Subjects: Aircraft components; Aluminum; Creep (materials); Damage accumulation; Damage assessment; Deformation; Domes; Energy theory; Gas pressure; Machining; Panels; Process parameters; Radiators; Sheets; Thickness; Titanium alloys; Titanium base alloys; Workpieces; Fracture; Stringer Radiator Panel Pnevmoforming; Research; Pressure; Stress; Strain
• ISSN: 1013-9826; 1662-9795; 1662-9795
• DOI: 10.4028/www.scientific.net/KEM.746.36

Stringer radiator panels made of aluminum and titanium alloys used in the hull structure of the aircraft, which is necessary to maintain the required temperatures. section of the channel profile has a predetermined geometry - a circular or rectangular cross-section of the channel, and the channel itself can be unilateral or bilateral. The technological process of production of radiator panels is to carry out one process machining position, consisting of a series of operations performed by the gas pressure diffusion bonding two sheets and hot-forming gas channels supplied between the sheets. We consider forming a shell of material, following the energy theory of creep and defectiveness. The expressions for the evaluation process and force parameters of damage, in particular - the destruction. The effect sizes of workpiece thickness in the dome, the relative magnitudes of changes in the geometric parameters and the magnitude of damage accumulated from the time of deformation under different laws for the loading of aluminum and titanium alloys. Comparison of theoretical and experimental data on the relative thickness of the dome blanks and reference points, as well as the relative height of the workpiece indicates satisfactory their agreement.