Crashworthiness analysis of perforated metal/composite thin‐walled structures under axial and oblique loading

Abstract

As a kind of lightweight structure with great economic benefits, metal/composite hybrid structure is raising rapidly among automobile safety components due to its excellent anti-collision performance. In this paper, a new design was developed by introducing an induced circular hole to improve the energy absorption performance of the AL/CFRP hybrid thin-walled tubes under different loading conditions. Quasi-static experiments and finite element simulation were carried out on the hybrid tubular sample with induced circular holes, and the crash resistance of the number and diameter of induced round holes under different loading angles (θ) of 0 ,10 , 20 , and 30 was analyzed through the verified finite element model. The results showed that the induction hole can effectively reduce the peak load and improve the energy absorption characteristics of the hybrid thin-walled tube under the axial (0) load. Under the inclined load, the energy absorption capacity of all samples decreased to different degrees with increasing loading angle, and the induced hole changed the deformation mode of the hybrid tube, especially under the 30 loading angle. The complex proportional assessment is then implemented on the optimal structures, and specific energy absorption, peak crush force, and crush force efficiency were selected as the objective functions to improve the overall impact resistance under different loading angles. Considering three design cases, the AL/CFRP hybrid thin-walled structure with three groups of induced holes are finally found as the best energy absorbing devices. The work in this paper can provide a guide for the design of advanced energy absorbing devices for arbitrary loading condition.

Metal/polymer composite cylinders for crash energy absorption applications

“…As a kind of lightweight structures with great economic benefits, metal/composite hybrid structures are rapidly used as automobile safety components due to its excellent anticollision performance. [ 15 ] Extensive research works have been conducted on metal/composite hybrid structures. [ 16–18 ]…”

“… falls by 24.32% and SEA slightly rises by 0.68% as compared to the intact tube. Fan et al [ 15 ] showed that the induction of holes can effectively reduce and improve U of Al/CFRP thin‐walled tubes subjected to axial loading. The effect of increasing d on U is less than that of increasing N.…”

“…As a kind of lightweight structures with great economic benefits, metal/ composite hybrid structures are rapidly used as automobile safety components due to its excellent anticollision performance. [15] Extensive research works have been conducted on metal/composite hybrid structures. [16][17][18] For engineering wants as assembly and for dropping the weight, introducing cutouts or holes in crashworthy components' walls is suggested.…”

Parallel optimization of design and manufacture for carbon fiber reinforced plastic oil pan based on the thickness distribution

“…The mechanical properties of CFRP are different according to the ply thickness, angle, and order. [23,24] For CFRP parts, using the whole ply will lead to material waste. Therefore, according to the requirements of working conditions, optimizing the composite laminate of CFRP can get different ply areas, which makes the requirements of stiffness and strength larger.…”

Fabrication and mechanical characterization of hybrid composite reinforced with nanoparticles of alumina and zirconia

“…[9] The reason behind the diverse applications of these composites is the excellent thermo-mechanical properties like high strength, elevated deterioration resistance, resistance to high temperature and high levels of hardness. [10][11][12] Due to the isotropic nature of nanoparticles of metals with refined physical and chemical properties, [13] MMCs are fabricated with the addition of nanoparticle metals. The nanoparticles are those particles whose size is within the scale of 1 Â 10 À9 meters to 100 Â 10 À9 m. [14,15] The property of nanoparticles whether physical or chemical is dependent on the size [16] as well as the shape of the particle.…”