Buckling and postbuckling of truncated conical shells with varying semi-vertex angle: The use of the single perturbation load approach

Regina Khakimova, Rolf Zimmermann, Maria Francesca Di Pascua, Saullo G.P. Castro, Mariano A. Arbelo, Richard Degenhardt

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

7 Citations (Scopus)


The importance of taking into account geometric imperfections for cylindrical and conical thin-walled structures in buckling had been already recognized a long time ago. Nowadays, the designers still use empirically based lower-bound methods such as the NASA SP-8007 guideline to calculate the required knock-down factors (KDFs). New design approaches that allow taking full advantage of using composite materials are required. The single perturbation load approach (SPLA), a new deterministic approach developed by Hühne for cylindrical shells, will be investigated with unstiffened composite conical structures. The SPLA's capability for predicting KDF is compared with the NASA approach. The SPLA was applied to perfect conical shells with different semi-vertex angles, and three different positions of the perturbation load were considered. The study contributes to the European Union (EU) project DESICOS, whose aim is to develop less conservative design guidelines for imperfection sensitive thin-walled composite structures.

Original languageEnglish
Title of host publication54th Israel Annual Conference on Aerospace Sciences 2014
PublisherTechnion Israel Institute of Technology
Number of pages14
ISBN (Print)9781632662651
Publication statusPublished - 1 Jan 2014
Externally publishedYes
Event54th Israel Annual Conference on Aerospace Sciences, IACAS 2014 - Haifa, Tel-Aviv and Haifa, Israel
Duration: 19 Feb 201420 Feb 2014


Conference54th Israel Annual Conference on Aerospace Sciences, IACAS 2014
CityTel-Aviv and Haifa

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