Study on energy absorption performance of variable thickness CFRP/aluminum hybrid square tubes under axial loading

Lu, Bingquan; Shen, Chuanliang; Zhang, Junyuan; Zheng, Danfeng; Zhang, Tianqi

doi:10.1016/j.compstruct.2021.114469

Cited by 37 publications

(11 citation statements)

References 33 publications

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“…Researchers have investigated the mechanical properties of composites through experimental studies, theoretical predictions, and finite element numerical analysis. [14][15][16] Among these, the finite element analysis method has gained popularity as it overcomes the limitations of theoretical prediction models, which are often oversimplified and have a narrower scope of application. The method reduces the cost of tests and can simulate and analyze mechanical phenomena that are difficult to observe directly in tests, making it an economical and effective analysis tool for studying the mechanical properties of composites.…”

Section: Introductionmentioning

confidence: 99%

“…The mechanical properties of composite structures and their applications in various engineering fields have been the focus of research. Researchers have investigated the mechanical properties of composites through experimental studies, theoretical predictions, and finite element numerical analysis 14–16 . Among these, the finite element analysis method has gained popularity as it overcomes the limitations of theoretical prediction models, which are often oversimplified and have a narrower scope of application.…”

Section: Introductionmentioning

confidence: 99%

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

Qin

et al. 2023

Polymer Composites

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Carbon fiber reinforced polymer is an effective solution for replacing metal materials and achieving lightweight, and both three‐dimensional (3‐D) braided composites and prepreg laminated composites have their strengths and weaknesses. Using only one forming process can be challenging to meet the performance requirements of structural components under complex operating conditions. To effectively reduce the production cost and cycle time of large structural components while ensuring the mechanical properties of the structure, this article proposes a novel three‐dimensional braided and prepreg‐layered (braid‐and‐lay) composite forming process that is studied in the context of metro bogies. First, the performance advantages of braid‐and‐lay composites were verified through experimental methods. Then, a multi‐scale analysis method, combining experimental and finite element analysis, accurately predicted the macroscopic elastic parameters of the three‐dimensional braided composite with an error of less than 10% compared to the experimental values. Finally, a structural optimization design of the braid‐and‐lay composite metro bogie was carried out based on the predicted elastic parameters. The results show that the mass of the structure was reduced by 15.33%, from 272.103 to 230.386 kg, while ensuring that the displacement and stress responses do not exceed the constraint range.Highlights Proposed a braid‐and‐lay integrated composite forming process. A multi‐scale analysis method, combining experimental and finite element analysis, was used to predict the modulus. The effect of braiding parameters on modulus prediction was investigated. The influence of the forming process and structural parameters on the performance of the metro bogie was investigated. The lightweight design of the metro bogie is effectively realized.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Qin

et al. 2023

Polymer Composites

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“…Recently, researchers have paid more attention to structures with graded thickness to maximize crashworthiness and material usage. [22][23][24][25][26][27][28][29] Han et al 30 proposed a new gradient auxetic tube with gradually increasing thickness from top to bottom and compared it with the traditional auxetic tube, and its mechanical properties were analyzed by finite elements. The results show that the advantages of high EA are more prominent when the wall thicknesses of the upper and lower sections differ significantly.…”

Section: Introductionmentioning

confidence: 99%

“…Specific processing methods, such as TRB technology and wire cutting, also have limitations and are more costly. 28 On the contrary, 3D printing technology provides design freedom by realizing complex geometric shapes and internal structures through simple modifications of digital models. As a result, 3D printing technology transforms timeconsuming and labor-intensive manufacturing processes.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical crashworthiness investigation of 3D printing carbon fiber reinforced nylon origami tubes

Jiang,

Zhao,

Chen

et al. 2023

Polymer Composites

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In this article, the crashworthiness performance of 3D printed origami tubes with variable thickness and different printing angles are investigated. First, experimental results showed that, compared with the traditional equal thickness origami tubes, the initial peak crushing force of variable thickness origami tubes (VTOT) was reduced by 41% and the specific energy absorption (SEA) had an improvement of 22%. Then, the energy absorption (EA) capacity of 3D printed origami tubes at different printing angles was measured and analyzed experimentally. It can be concluded that smaller print angles provide better EA, and the larger print angles result in a significant increase in layer‐to‐layer shear under quasi‐static axial loads, which makes the component more susceptible to buckling and cracking. Finally, the finite element method was constructed through Abaqus/Explicit to study the crashworthiness of VTOT under different mean thickness and the thickness difference in detail. As the mean thickness increases, the load‐carrying capacity and EA capacity increase during the crushing process, but the VTOT with a mean thickness of 1.2 mm has the highest SEA and CLE. The larger thickness differences can significantly improve the EA properties of the VTOT through the changing of the deformation mode.Highlights Both experimental and numerical methods were used to study origami tubes with varying thicknesses. Origami tubes printed at 0° have a higher energy absorption capacity. Variable thickness origami tubes improve the crashworthiness of traditional origami tubes.

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“…Collapsible energy absorbers have been of particular interest for impact mitigation in vehicles. Examples include the inversion (Yang and You, 2018), splitting (Huang et al, 2002), and axial crushing (Lu et al, 2021) of tubes. They also exhibit the characteristic extended plateau of Type I systems.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of blast effects through novel energy-dissipating connectors

Seica

Packer

Walker

et al. 2022

International Journal of Protective Structures

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Explosions generate overpressures that can cause irreparable damage to structures. For many buildings, especially critical infrastructure, continued operation after an explosive attack is essential. The use of energy-dissipating methods will enable the protection of a structure and occupants from a blast and permit the timely repair and re-occupation of the building after an event. The concept behind the system presented is the creation of panels that can be used as cladding for structures. The panels are connected to the main structure using energy-dissipating component assemblies around the panel edge. When subjected to a blast load the panels transfer the blast pressure through the assemblies, thereby reducing the forces transmitted to the underlying structure. After an event, the panels and energy-dissipating component assemblies can be replaced quickly and easily, allowing the building to be reoccupied in a short time after an attack. This study focuses on the characterization of energy-dissipating component assemblies using static and dynamic laboratory testing. A predictive theory, supported by a single degree of freedom model, is developed and a general evaluation method proposed. Further laboratory testing expands the characterization of behaviour of the assemblies through experiments, with a blast generator in tension tests and in simulated blast panel tests. The time histories developed from tension tests are then compared to examine the effect of loading rate. The investigations on blast panels also include a comparison with predictions to determine whether the latter can describe the global behaviour of the system. Lastly, the response of the energy-dissipating component assemblies is evaluated in full-scale field blast tests on cladding panels.

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Study on energy absorption performance of variable thickness CFRP/aluminum hybrid square tubes under axial loading

Cited by 37 publications

References 33 publications

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

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

Experimental and numerical crashworthiness investigation of 3D printing carbon fiber reinforced nylon origami tubes

Mitigation of blast effects through novel energy-dissipating connectors

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