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Shell structures are used as primary structures of space launch vehicles. These structures are thin-walled and are thus prone to buckling when loaded in compression. Because of the imperfection sensitivity of these structures, small deviations of the real shell from the theoretically perfect shell may result in a tremendous decrease in load carrying capacity. For this reason, geometrical imperfections need to be taken into account. When designing unstiffened composite shells, the laminate stacking sequence influences both, the buckling load of the geometrically perfect shell and the imperfection sensitivity of the shell. Consequently, to derive laminate stacking sequences that maximize the buckling load of real shell structures, geometrical imperfections need to be taken into account already in an early design phase. In this paper, two laminate stacking sequences that were derived to maximize the buckling load of the geometrically perfect and imperfect shell structure are studied using stochastic methods. To this end, combination of non-rotational symmetric imperfections derived from measured data and variations of the ply orientation are studied in a stochastic analysis on basis of Monte Carlo simulations. The results of this study will be used to evaluate the influence of the stacking sequence as one of the essential properties dominating the structural response of geometrically imperfect laminate composite shell structures.
Original languageEnglish
Title of host publicationProceedings of ECCOMAS Congress 2016, VII European Congress on Computational Methods in Applied Sciences and Engineering
Subtitle of host publicationCrete Island, Greece
Number of pages8
Publication statusPublished - 2016
Event7th European Congress on Computational Methods in Applied Sciences and Engineering - Crete, Greece
Duration: 5 Jun 201610 Jun 2016
Conference number: 7
https://www.eccomas2016.org/

Conference

Conference7th European Congress on Computational Methods in Applied Sciences and Engineering
Abbreviated titleECCOMAS Congress 2016
CountryGreece
CityCrete
Period5/06/1610/06/16
Internet address

    Research areas

  • Shell buckling, imperfection sensitivity, composite shells

ID: 10410389