Energy absorption of thin-walled tubes enhanced by lattice structures

Cetin, Erhan; Baykaşoğlu, Cengiz

doi:10.1016/j.ijmecsci.2019.04.049

Cited by 128 publications

(34 citation statements)

References 56 publications

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“…15,16 In various studies, thinwalled tubes filled with periodic lattice materials mentioned as novel hybrid structures, and porous 3 D printed cellular structures are introduced and their energy absorption behaviors and crashworthiness properties under axial impact loadings are investigated. 17,18 Regarding lattice structures generation, unit cell selection criteria which are of great importance, have been discussed in some studies. So, a unit cell should be proposed or selected and then patterned in 2 or 3 directions.…”

Section: Introductionmentioning

confidence: 99%

Mechanical performance of additively manufactured uniform and graded porous structures based on topology-optimized unit cells

Teimouri

Asgari

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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A topology optimization (TO) method is used to develop new and efficient unit cells to be used in additively manufactured porous lattice structures. Two types of unit cells including solid and thin-walled shell-type ones are introduced for generating the desired regular and functionally graded (FG) lattice structures. To evaluate structural stiffness and crushing behavior of the proposed lattice structures, their mechanical properties, and energy absorption parameters have been calculated through implementing finite element (FE) simulations on them. To validate the simulations, two samples were fabricated by a stereolithography (SLA) machine. Besides, the effects of geometrical parameters and optimizing scheme of the unit cells on the mechanical properties of the proposed structures are studied. Consequently, energy absorption parameters have been calculated and compared for both the solid and thin-walled lattice structures to evaluate their ability in energy absorption. It was found in general that for the solid lattice structures, the mechanical properties, and the crushing parameters are directly affected by porosity though in shell-type ones superior mechanical properties could be achieved even for a smaller proportion of material usage.

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Section: Introductionmentioning

confidence: 99%

Mechanical performance of additively manufactured uniform and graded porous structures based on topology-optimized unit cells

Teimouri

Asgari

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…In addition, based on the experimental observations, since composite piles buckled prior to failure and also some of them were already in a curved shape, geometric imperfections were introduced. 49 , 50 Therefore, likely buckling modes of the IWS structures were obtained initially through performing linear buckle analysis using the standard ABAQUS solver. It needs to be pointed out that the boundary conditions were the same as were performed on FE simulations on IWS composite samples.…”

Section: Finite Element Modelingmentioning

confidence: 99%

The crashworthiness performance of integrally woven sandwich composite panels made using natural and glass fibers

Dastan

Safian

Sheikhzadeh

2020

Journal of Composite Materials

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As a way to save petroleum resources, considerable efforts were made in the last three decades to develop green composites. Green composites are a category of composite materials in which at least one phase (reinforcement or matrix) is made from renewable resources. An attempt was made to present a simple fabrication process to produce hollow integrally woven sandwich composites. In addition, the potential of jute fibers to be utilized as piles in the core of an integrally woven sandwich composite was assessed and compared to the counterparts made using glass fibers. The crashworthiness performances of integrally woven sandwich composite samples considering the effect of relative density, pile material and the presence of polyurethane foam were investigated through performing quasi-static flat-wise compression tests. Based on the findings, the foam-filled integrally woven sandwich composites exhibited stable compression load-displacement response and better energy absorption properties over pure foam, which make them appropriate for automobile interior components. Moreover, a computational cost-efficient finite element modeling was presented and subsequently validated with experimental results.

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“…Polymeric foams are widely used in protective applications due to their high energy absorption capability [1][2][3], and the properties of a variety of open-cell and closed-cell foams have been widely studied under quasi-static compression [4][5][6], impact, and high strain rate loading conditions [7,8]. Foam materials and other materials can be combined into composite materials with excellent properties as needed [9][10][11]. For example, when polymer foam material is used as the core of sandwich composite [12][13][14], its impact resistance and energy absorption effect are significantly improved compared with similar materials [15,16].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Energy Absorption Capabilities of Polyethylene Foam under Impact Deformation

2021

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Foams are widely used in protective applications requiring high energy absorption under impact, and evaluating impact properties of foams is vital. Therefore, a novel test method based on a shock tube was developed to investigate the impact properties of closed-cell polyethylene (PE) foams at strain rates over 6000 s−1, and the test theory is presented. Based on the test method, the failure progress and final failure modes of PE foams are discussed. Moreover, energy absorption capabilities of PE foams were assessed under both quasi-static and high strain rate loading conditions. The results showed that the foam exhibited a nonuniform deformation along the specimen length under high strain rates. The energy absorption rate of PE foam increased with the increasing of strain rates. The specimen energy absorption varied linearly in the early stage and then increased rapidly, corresponding to a uniform compression process. However, in the shock wave deformation process, the energy absorption capacity of the foam maintained a good stability and exhibited the best energy absorption state when the speed was higher than 26 m/s. This stable energy absorption state disappeared until the speed was lower than 1.3 m/s. The loading speed exhibited an obvious influence on energy density.

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Energy absorption of thin-walled tubes enhanced by lattice structures

Cited by 128 publications

References 56 publications

Mechanical performance of additively manufactured uniform and graded porous structures based on topology-optimized unit cells

Mechanical performance of additively manufactured uniform and graded porous structures based on topology-optimized unit cells

The crashworthiness performance of integrally woven sandwich composite panels made using natural and glass fibers

Evaluation of Energy Absorption Capabilities of Polyethylene Foam under Impact Deformation

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