Numerical and experimental study of crashworthiness parameters of honeycomb structures

Meran, Ahmad Partovi; Toprak, Tuncer; Muğan, Ata

doi:10.1016/j.tws.2013.12.012

Cited by 95 publications

(29 citation statements)

References 17 publications

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“…The load vs. displacement traces ( Figure 5) were used to determine the energy absorption (E A ), using Equation (1) [20],…”

Section: Energy Absorptionmentioning

confidence: 99%

“…The failure mechanisms involved included yielding of the top skin, intra-cell buckling, face wrinkling, core shear, and indentation. Many earlier efforts [17][18][19][20] focusing on the determination of the honeycomb crush behavior and energy absorption capability have concentrated on out-of-plane compressive loading. Failure initiation and propagation in a honeycomb under quasi-static and impact loading have both been described in detail [16].…”

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confidence: 99%

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Manufacturing and Performance Evaluation of Carbon Fiber–Reinforced Honeycombs

et al. 2019

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In this work, the manufacturing characteristics and a performance evaluation of carbon fiber–reinforced epoxy honeycombs are reported. The vacuum-assisted resin transfer molding process, using a central injection point, is used to infuse a unidirectional dry slit tape with the epoxy resin system Prime 20 LV in a wax mold. The compression behavior of the manufactured honeycomb structure was evaluated by subjecting samples to quasi-static compression loading. Failure criteria for the reinforced honeycombs were developed and failure maps were constructed. These maps can be used to evaluate the reliability of the core for a prescribed loading condition. Improvements in the load-carrying capacity for the reinforced samples, as compared with unreinforced specimens, are discussed and the theoretical predictions are compared with the experimental data. The compression test results highlight a load-carrying capacity up to 26 kN (~143 MPa) for a single hexagonal cell (unit cell) and 160 kN (~170 MPa) for cores consisting of 2.5 × 3.5 cells. The failure map indicates buckling to be the predominant mode of failure at low relative densities, shifting to cell wall fracture at relative densities closer to a value of 10−1. The resulting energy absorption diagram shows a monotonic increase in energy absorption with the increasing t/l ratio of the honeycomb core cell walls.

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“…The load vs. displacement traces ( Figure 5) were used to determine the energy absorption (E A ), using Equation (1) [20],…”

Section: Energy Absorptionmentioning

confidence: 99%

mentioning

confidence: 99%

Manufacturing and Performance Evaluation of Carbon Fiber–Reinforced Honeycombs

et al. 2019

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“…Thin-walled cellular energy absorbing materials are widely used in different industry areas for the efficient energy damping in cases when it is necessary to immediately stop high speed transport vehicle. Based on the cellular structure of the energy absorber material, it is possible to manage the stop distance and maximum load [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties of the Bulk Standard Samples and Cellular Energy Absorbers

Kuznetcov¹,

Zhukov²,

Deev³

et al. 2018

Additive Manufacturing of High-Performance Metals and Alloys - Modeling and Optimization

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The development of additive technology revealed a real prospect of their use for the manufacture of complex shapes. Now, it is possible to produce parts that previously were either very difficult to produce using the subtracting technology and joining technology, or it was not at all feasible. In the manufacture of parts of complex shape, it is necessary to use a supporting structure, which is necessary to place such a way that they can be easily removed. Additionally, they must necessarily be absent in certain places. In this regard, the preparation model can take significant time to satisfy all of these, often conflicting, requirements. In this paper, we show optimization examples of the model preparation with support structures for parts manufactured at the facility EOSINT M270 and used in medicine and engineering. Additional emphasis is on the fact that, during the manufacture of parts, solidification's modes of massive parts differ from those of the thin-walled portions of parts. The results of the complex studies on the different stainless steels (including martensitic) are described with an emphasis on their structure and mechanical properties. The results of a honeycomb energy absorbers, which are quite seldom produced by the additive technologies, are presented in this chapter.

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“…However, such a model do not account for the strain rate effect of parent materials from which cellular materials are made. More dynamic finite element studies can be found in literature, but most of them adopted a rate independent elastic-perfectly plastic or bilinear constitutive law [8,11,[35][36][37]. Recently, Tao et al [38] studied the strain rate effect on the behavior of metallic honeycombs through numerical analysis and a rate-dependent (R-D) shock theory was proposed.…”

Section: Introductionmentioning

confidence: 99%