Energy Absorption Characteristics of a CFRP-Al Hybrid Thin-Walled Circular Tube under Axial Crushing

Abstract

Thin-walled tubes have gained wide applications in aerospace, automobile and other engineering fields due to their excellent energy absorption and lightweight properties. In this study, a novel method of entropy-weighted TOPSIS was adopted to study the energy absorption characteristics of a thin-walled circular tube under axial crushing. Three types of thin-walled circular tubes, namely, aluminum (Al) tubes, carbon-fiber-reinforced plastics (CFRP) tubes and CFRP-Al hybrid thin-walled tubes, were fabricated. Quasi-static axial crushing tests were then carried out for these specimens, and their failure modes and energy absorption performance were analyzed. The CFRP material parameters were obtained through tensile, compression and in-plane shear tests of CFRP laminates. The finite element models for the quasi-static axial crushing of these three types of circular tubes were established. The accuracy of the finite element models was verified by comparing the simulation results with the test results. On this basis, the effects of the geometric dimension and ply parameters of a CFRP-Al hybrid thin-walled circular tube on the axial crushing energy absorption characteristics were studied based on an orthogonal design and entropy-weighted TOPSIS method. The results showed that Al tube thickness, CFRP ply thickness and orientation have great effect on the energy absorption performance of a CFRP-Al hybrid thin-walled circular tube, whereas the tube diameter and length have little effect. The energy absorption capability of a CFRP-Al hybrid tube can be improved by increasing the thickness of the Al tube and the CFRP tube as well as the number of ±45° plies.

Revisión comparativa de la capacidad de absorción de energía mecánica de estructuras tubulares compuestas

“…En la Tabla 1 se presentan los resultados experimentales de cuatro estudios en donde se detallan las dimensiones y materiales utilizados [16,36,[46][47][48][49].…”

“…Al contrastarlo con la configuración A2 [0,90]4, en la cual se obtuvo la menor SEA de 6.5 kJ/kg (ver Figura 7), se puede calcular una diferencia del 93.25%. Se puede notar de la información de la Tabla 1 que, además de la cantidad de láminas y de la longitud, estos tubos están reforzados con fibras de diferente material, vidrio (A2) y carbono (A1), la cual podría ser la diferencia de mayor impacto, ya que se ha reportado que las fibras de carbono exhiben una mayor capacidad de absorción de energía que las fibras de carbono [36,48,[49][50][51][52]. Se puede observar en la Figura 6 que muestras de A8 a A11 comparten la misma configuración [0,90]8.…”

“…Adicionalmente, en el estudio de Cui et al [49] se obtuvo la capacidad de absorción de energía para los tubos etiquetados C9, C7 y C11 con [30,-30,90]2, C12, C13 y C14 con [45,-45,90]2 y C6, C8 y C10 con [60,-60,90]2 presentados en la Tabla 3. En la Figura 10 se puede observar que la configuración [45,-45,90]2 (C14) exhibió la mayor absorción de energía, con un valor de 48.27 kJ/kg, correspondiente al 39.89%.…”

Collapse Behavior and Energy Absorption Characteristics of Design Multi-Cell Thin Wall Structure 3D-Printed Under Quasi Statistic Loads

“…As the load increases, it is seen that the tube expands and forces the inner side to create a fold (lobes), as shown in Figure 8c and Figure 8d. After reaching a fractural stretch in the high curved area of the lobes formation, it then breaks [39], [40]. The occurrence of lobes formation arrangement mechanisms may indicate that the energy of destruction can be well absorbed while the impactor strikes the test object.…”

Research on the characteristics of EV interior sound quality and its dynamic active control system design and development un-der accelerated driving conditions

“…Vehicle lightweighting increases fuel economy on the basis of vehicle weight reduction [ 6 , 7 ]. Due to the increasingly strict legal requirements on fuel economy and emission standards, more car companies focus on the research and development of new energy vehicles.…”