Theoretical prediction model of mean crushing force of CFRP‐Al hybrid circular tubes under axial compression

Abstract

The CFRP-Al hybrid thin-walled structure combines the dual advantages of carbon fiber reinforced plastics (CFRP) and metal, which is one of the crucial methods for both lightweight and high strength. This study aimed to explore the theoretical prediction of the mean crushing force of the hybrid tubes with different winding angles subjected to axial compression. In order to construct the theoretical model of the hybrid structural energy absorption response, the failure modes, and deformative behavior of the hybrid tubes are analyzed and summarized based on the axial compression experiments. Considering the effects of winding angles on the energy dissipation and deformation characteristic of hybrid circular tubes, the expressions of membrane force and binding energy per unit length are obtained. Then, the analytical model is established to predict the mean crushing force of the CFRP-Al hybrid circular tube. Furthermore, the results of the prediction model are compared according to different failure criteria of composite materials. The findings show that the predicted values of the maximum stress failure are more consistent with the experimental values, in which the discrepancy between analytically predicted and experimentally tested mean crushing forces of these hybrid tubes is no more than 10%. The results can provide a basis for the design of the composite-metal hybrid thin-walled tube.

Numerical analysis and theoretical studies on the axial compression behavior of multi‐cell Al‐CFRP hybrid tubes

“…To quantitatively evaluate the response of crushing and energy absorption characteristics of the structure, peak crushing force (), energy absorption (), mean crushing force () and specific energy absorption (), are used to evaluate its performance. [ 24–26 ] The is used to indicate the maximum force during the crushing process. The for a given structural deformation is defined as: where is the instantaneous crushing force during the crushing process obtained by experiment.…”

“…For multi-cell hybrid tube members, the difficulties of experimental observation and the jump in the cost of numerical analysis and calculation caused by the complexity of the components and structure of the composite part of the constituent materials will largely restrict the design and application of multi-cell hybrid structures. In addition, although some scholars have conducted studies on theoretical models of hybrid structures, [24][25][26] there are still relatively few studies on theoretical models of multi-cell hybrid structures; moreover, the theoretical models are mostly premised on some idealized assumptions and ignore the effects of certain secondary factors. For example, Wiwezbicki and Abramowicz [22] proposed a superfolded cell theory applied to the symmetric deformation mode of a square metal tube, which assumes that the tube deforms plastically in a strictly symmetric mode and ignores the energy absorption due to elastic deformation, so the average load calculated by the theoretical model is slightly lower than the experimental value.…”

Non‐articulated hybrid glass and carbon‐reinforced shank tube for bio‐medical applications

“…Axial compression tests [28,29] are usually carried out to determine a component's axial strength, buckling fabricated shank tube was subjected to uniaxial compression load by the UTE-100 UTM (Figure 4). The shank tube was mounted on the compression plate in a fashion such that the axis of the top adapter and end adapter is collinear to each other.…”

“…Axial compression tests [ 28,29 ] are usually carried out to determine a component's axial strength, buckling behavior, and stress–strain correlations. The body is subjected to an axial load, which tends to compress the body.…”

Study on structural optimization of braid‐and‐lay integrated carbon fiber reinforced polymer for metro bogie

“…Composite laminated structures are suitable for flat stress conditions, while metal-composite composite structures are suitable for complex space stress conditions. [8][9][10][11] Switzerland was among the first countries to apply composite materials to rail vehicles. As early as 1990, the independently developed train body used a large number of carbon fiber composites.…”