Numerical Evaluation of the Behavior of Composite Pipes Under Pure Bending Loading

The most important composite pipes include CFRP and GFRP pipes whose behaviors differ under various loadings. Major loadings applied to pipes include axial loading, bending loading, transverse loading, and internal and external pressure loading. In this study, ۱۶۲ models of CFRP composite pipes with length-to-diameter and diameter-to-thickness ratios, the angle of fibers, and also the number of layers of fibers were subjected to pure bending loading. Abaqus Finite Element Software was used to model and investigate the behavior of the samples. According to the findings, concerning the effects of the length-to-diameter (L/D) ratio, under the pure bending state when sample CFRP pipes have a constant diameter-to-thickness (D/t) ratio and angle of fibers and are subjected to pure bending loading, the pipes’ bending capacity will increase if the length-to-diameter (L/D) ratio increases. On the other hand, when the diameter-to-thickness (D/t) ratio is constant, i.e., when the angle of fibers is [±۴۵], the pipes’ bending capacity will increase more than the state when the angle of fibers is [۰] or [۹۰] if the length-to-diameter (L/D) ratio increases. According to the findings, concerning the effect of the diameter-to-thickness (D/t) ratio under the pure bending state, when sample CFRP pipes have a constant length-to-diameter (L/D) ratio and angle of fibers and are subjected to pure bending loading, the samples’ bending capacity will decrease if the diameter-to-thickness (D/t) ratio increases while their diameter is constant and thickness is variable.

کلیدواژه ها:

composite pipes ، pure bending ، length-to-diameter ratio ، angle of fibers