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

Abstract

To find a thin‐walled impact‐resistant structure with excellent crushing performance, a multi‐cell hybrid thin‐walled tube (MCHT) formed by winding carbon fibers around a multi‐cell Al tube was proposed. The structure is designed based on different structural parameters of the thin‐walled tubes exhibiting different crushing characteristics and damage modes. First, a finite element model applicable to MCHT is established, and the accuracy of the model is verified by quasi‐static axial pressure experiments. Second, the verified finite element model was used to study the variation law of the overall structural crushing performance by changing the structural parameters of MCHT, and the Al tube wall thickness was found to have the greatest effect on MCHT crushing performance, followed by the number of ribs and finally the inner circle diameter. Then, a theoretical prediction model of the mean crushing force of MCHT was established based on the principle of energy conservation, and the accuracy of the theoretical model was initially verified through experiments. Finally, to overcome the problem that the prediction error of the theoretical model is larger when the number of ribs is larger or the inner circle diameter is smaller, a correction function is constructed based on Pearson correlation coefficient analysis to further improve the generalization ability of the above‐mentioned theoretical model, and the maximum relative error is reduced from 37% to 14.61%.

Quasi‐static axial crushing of multi‐tubular foam‐filled carbon fiber reinforced composite structures

“…It was observed that the tubes with foam filling had improved energy absorption and load‐carrying capacity as compared to the tubes with only the hybrid. Moreover, absorption energy was also enhanced by increasing the thickness of the foam filling 40 …”

“…Moreover, absorption energy was also enhanced by increasing the thickness of the foam filling. 40 Kim et al studied the epoxy-based circular tubes constructed from carbon, Kevlar, and carbon-Kevlar hybrid fiber composites. 41 They investigated the failure modes and energy absorption capacities of these tubes.…”

Predictive modeling of jute‐polyester composite tubes for impact performance: A comprehensive finite element analysis approach

“…1,2 Extensive literature exists regarding the utilization of advanced FEA tools for modeling composite structures. Abaqus/Explicit 3 and LSDYNA have extensively employed FEA tools for simulating the dynamic axial crushing behavior of composite tubes. While there are limited options when it comes to simulating the crash response, LSDYNA stands out as a prominent and extensively utilized FEA package for nonlinear transient analysis of structures.…”

Prediction of pseudo‐ductility and structural optimization of nacre‐inspired carbon fiber‐reinforced polymer laminate

“…Besides that, because related research might consume a significant amount of financial resources and manpower, finite element analysis (FEA) should be applied and assisted in the study. 30,31 In this paper, a series of biomimetic CFRPs with high adhesive strength and heat resistance was designed and prepared by T700 and 3234 epoxy resin. The effect of their overlapping length on tensile strength and pseudoductility was researched through experimental and simulation methods.…”

“…Much advance on the performance prediction and structural optimization of discontinuous laminates has been gained by the previous studies. Besides that, because related research might consume a significant amount of financial resources and manpower, finite element analysis (FEA) should be applied and assisted in the study 30,31 …”