Effect of Localized Bending at Through‐Flaws in Pressurized Composite Cylinders

Autor:	Paul A. Lagace, Kevin J. Saeger
Rok vydání:	1993
Předmět:	Materials science Structural mechanics Mechanical Engineering Composite number Finite difference method Aerospace Engineering Bending Pressure vessel Stress (mechanics) General Materials Science Composite material Damage tolerance Displacement (fluid) Civil and Structural Engineering
Zdroj:	Journal of Aerospace Engineering. 6:381-393
ISSN:	1943-5525 0893-1321
Popis:	An analytical and experimental investigation was conducted to determine the effect of localized bending at through‐flaws in pressurized composite cylinders. A finite‐difference solution was formulated to determine the stress, strain, and displacement fields in the vicinity of a slit. Tests were conducted on 305‐mm‐diameter cylinders made from graphite/epoxy fabric in a (0,45)s configuration, with axial slits. Surface‐strain‐field measurements made in the vicinity of the slit showed a significant bending, which verified the finite‐difference solution. This significant bending near the slit tip results in a large magnification of the stresses there. An average stress criterion was employed to predict the failure response of these cylinders based on data obtained from coupon specimens. The finite‐difference solution provided correction factors to account for the localized bending. The prediction utilizing this methodology was excellent in all cases. A generalized methodology to assess damage tolerance of str...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::81ed04f99f740867bedfb9aa35042c7b https://doi.org/10.1061/(asce)0893-1321(1993)6:4(381) Zobrazit plný text záznamu