Crashworthiness characteristics of hydrothermally aged intraply glass/basalt composite pipes

In this research, the effect of different water aging effect on the crashworthiness of intraply glass/basalt fiber-reinforced composite pipes made using the wet filament winding process was examined. Using both theoretical and practical methods, the water uptake behavior of pipes with winding angles of ±55° and ±70° was examined in the initial section of the investigation. In the later division of this research, crushing tests for composite samples exposed to hydrothermal aging were performed and compared with their dry state. According to the practical results for the water sorption curves, the group that absorbs the most water was non-hybrid basalt fiber reinforced pipes. However, the presence of glass which absorbs water relatively less in hybrid composites, caused basalt fibers to absorb less water in both water types. In quasi-static axial compression experiments, non-hybrid glass pipes exhibited the highest specific energy absorption compared to others. Aging leading to material degradations resulted with decreases in crashworthiness indicators such as energy absorption, load-bearing capability. However, hybridized pipes having more progressive crushing behavior contributed to fixing crushing stability compared to non-hybrid glass fiber reinforced pipes. Also, the increase in the winding angle, whether dry or aged, showed a decrease in the energy absorption values.