The assessment of the compressive strength of fibre metal laminates after low-velocity impact

The aim of the work was to assess the compressive strength of Fibre Metal Laminates after impact. The main objective of the evaluation of the compression after impact assessment of FMLs was the deep analysis of damage growth range, size and mechanisms during load from various initial damage states and final post-impact strength. The glass fibre/titanium and carbon fibre/titanium Fibre Metal Laminates were tested and analysed. Laminates previously subjected to impact energies ranging from 5 to 35 J were tested. Based on the research, three load bearing states of fibre-metal laminates were identified and characterized on the basis of an analysis of force reduction characteristics. In addition, it was found that the strength reduction of FMLs in relation to impact energy does not decrease significantly. One of the most crucial grounds for the above is the protective role of the elastic-plastic metal layers against rapid local buckling of the strength-carrying composite component.

Automated summary

The aim of this study was to evaluate the compressive strength of Fibre Metal Laminates (FMLs) after impact. The main objective was to analyze the damage growth range, size, and mechanisms during load under different initial damage states and final post-impact strength. Glass fibre/titanium and carbon fibre/titanium FMLs were tested and analyzed. The research identified and characterized three load bearing states of FMLs based on force reduction characteristics. Additionally, it was found that the strength reduction of FMLs does not decrease significantly with impact energy, possibly due to the protective role of elastic-plastic metal layers.