Abstract
This study investigates the problems of non-linear stability and load-carrying capacity of thin-walled composite Z-profiles under compression. The primary objective of the study was to determine the effect of eccentric load and ply-stacking sequence on the post-critical behaviour and load-carrying capacity of the analysed structures. Experimental and numerical methods were employed, which made it possible to describe structural performance of the analysed composite structures over the full range of loading, including the description of composite material damage. Experimental tests were performed on the physical models of CFRP profiles made by autoclaving. The real structures were subjected to compression until a complete loss of their load-carrying capacity. Simultaneously, numerical calculations were performed by the finite element method. The progressive damage model was used to evaluate the degree of damage in the composite material. The developed numerical models were validated with the results of experimental tests.
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