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Journal of Applied Mechanics and Technical Physics

2018 year, number 3

Acoustic-Emission Control of the Deformation and Fracture of High-Pressure Metal-Composite Tanks

A. M. Lepikhin1, V. V. Moskvichev1,2, A. P. Chernyaev2
1Institute of computational Technologies, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia, 660049
2Nauka Special Design and Technological Bureau, Krasnoyarsk, Russia, 660036
Keywords: металлокомпозитный бак, испытания на прочность, повреждения, акустико-эмиссионный контроль, metal-composite tank, strength tests, damage, acoustic-emission control

Abstract

This paper presents the results of experimental studies of damage accumulation in a metal-composite high-pressure tank in pneumatic strength tests. The deformation and fracture of the composite structure, accompanied by matrix cracking and fiber rupture, are analyzed. It is shown that the cracks and fractures generate acoustic-emission signals of various types. The results of acoustic-emission control were used to develop a criterion for ranking tanks based on the strength characteristics of the pressure composite shell.