Guidelines for test conditions and documentation of buckling experiments with cylindrical CFRP shells

Article Number
67
Citation
23rd International Conference on Composites Materials (ICCM 2023)
Contribution to Conference
23rd International Conference on Composites Materials, ICCM 2023 
Publisher Link
https://www.iccm-central.org/Proceedings/ICCM23proceedings/papers/ICCM23_Full_Paper_67.pdf
Scopus ID
2-s2.0-85187540784
Publisher
Queen's University Belfast
Different types of loads, such as axial compression, torsion or bending, cause thin-walled cylindrical shells to collapse due to buckling. Because of numerous kinds of possible imperfections, this usually occurs significantly below the buckling load of the ideal shells. When using fibre composites, there are even more influencing factors. Therefore, test data are indispensable for the design of new shells. This data is needed to validate models and new design approaches. However, the available database remains a major challenge. Many experimental data are not freely accessible or were generated under different conditions. In this contribution, the available database is gathered and evaluated. Differences and irregularities are identified. Subsequently, it is shown which data the most widespread or common design approaches require. Based on the analysis of the available database as well as the required data for the individual design approaches, recommendations for testing thin-walled cylindrical shells and for publishing new test data are formulated. Finally, a test series of 12 thin-walled CFRP cylinder shells is used to show how these recommendations are to be applied. It is illustrated that the scatter varies depending on the quality of the test, thus underlining the importance of profound documentation of test procedures, setup and results.
Schlagworte
Composite
Cylindrical Shells
Buckling
Experiment
DDC Class
670: Manufacturing