Low-velocity impact resistance of composite sandwich panels with various types of auxetic and non-auxetic core structures

Usta, Fatih; Türkmen, Halit S.; Scarpa, Fabrizio

doi:10.1016/j.tws.2021.107738

Cited by 112 publications

(37 citation statements)

References 76 publications

(133 reference statements)

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“…The results of the numerical model provide a visible region between the first and second peak loads, which is governed by core damage. In the experiment, this region is not evident to notice because the failed elements are not deleted and this leads to densification, as already reported in previous studies [11]. Figure 13 both numerically and experimentally analysis, showing a higher displacement value in the experimental case, potentially due to both boundary definition and the mathematical modeling of the Nevertheless, the discrepancies between the numerical and experimental results are acceptable to assess the overall performance from an engineering perspective.…”

Section: Comparison Between Experimental Results and Fem Resultssupporting

confidence: 63%

supporting

confidence: 57%

“…Likewise, the amount of energy absorbed during the impact, the failure and degradation of the impacted specimens were monitored, following the analysis of experimental and numerical data. It can be concluded that 3D printed honeycomb using FDM technology PLA 5% and 10% honeycomb infill impact structures have acceptable energy absorption capacity under low velocity impact, comparable to that of metallic [14], hybrid [8] and composite [11,13] materials honeycomb structures.…”

Section: Discussionmentioning

confidence: 95%

See 2 more Smart Citations

Impact Behavior Analysis of 3-D Printed Honeycomb Structures

Stoica¹,

Maier²,

Istrate³

et al. 2022

Mater. Plast.

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The purpose of this paper is to evaluate the behaviour of 3D printed honeycomb structures under low velocity impact loading for their use in energy absorption applications. Additive manufacturing technologies are part of a growing field that represents high interest for industries such as aerospace, automotive and naval. This paper aims to determine the mechanical properties of a 3D printed polymer - Polylactic Acid (PLA) manufactured by FDM (Fused Deposition Modelling) technology. In this regard, first the material is characterized by low velocity impact dynamic experimental tests. A finite Element Analysis (FEA) is performed in LS-Dyna software in order to validate the results. The samples were manufactured by varying the infill percent to investigate the influence of different parameters on a batch of samples for every configuration. The 3D CAD modelling for impact tests samples were performed in Catia V5. Among wide range of cellular structures, honeycomb non-auxetic hexagonal cell pattern was selected in this study, assuring high strength/weight ratio. The amount of energy absorbed during the impact, the failure and degradation of the impacted specimens were monitored, following the analysis of experimental and numerical data. A fair agreement was obtained between experimental and numerical results, showing that honeycomb developed lightweight structures exhibits a proper energy absorption capacity, with a mechanism of release similar to metal or composite materials honeycombs.

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Section: Comparison Between Experimental Results and Fem Resultssupporting

confidence: 63%

supporting

confidence: 57%

Section: Discussionmentioning

confidence: 95%

See 1 more Smart Citation

Impact Behavior Analysis of 3-D Printed Honeycomb Structures

Stoica¹,

Maier²,

Istrate³

et al. 2022

Mater. Plast.

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“…The term "auxetic" was first introduced in 1991 by Kenneth E. Evans [3]. Under low-velocity impact [4]- [11], high-velocity impact [12]- [15], and blast loading [16]- [20], a core with NPR performs better in terms of energy absorption, damage localization, and densification. With such an "auxetic" characteristic, the possibility of increasing the performance of sandwich structures is promising.…”

Section: Introductionmentioning

confidence: 99%

Finite element procedure to simulate sandwich structure with an auxetic core under impact loading using ABAQUS/Explicit

Pratama

Jusuf

Yudhanto

et al. 2023

IJAAS

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<span>A sandwich structure with an auxetic core is promising in improving the performance of a sandwich structure by implying an auxetic core as its core to combine the advantages of the two structures, e.g., sandwich structure’s superior ability in flexural and shear resistance, auxetic structure in localizing damage, and densification phenomena. This paper discusses a finite element modeling procedure to simulate a sandwich structure with a heterogeneous re-entrant auxetic core. The material of the face is a unidirectional carbon fiber reinforced polymer (UD CFRP) and the core is polylactic acid (PLA). The model is subjected to a low-velocity impact loading and is run through the ABAQUS/Explicit software. We found that the model we developed here could simulate up to the elastic region and identify which element had failed. However, it could not fully resemble and represent the model from reference, where fracture or damage does not occur. This model can be further improved in its material modeling strategy, especially in the fracture modeling of the composite face with compatible material properties in all required sectors, especially damaged sections, which are strictly necessary.</span>

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“…17 In recent years, various softwares have been used to simulate the behavior of printed structures. LS-DYNA is one of the most widely used finite element software for simulating the behavior of materials made from PLA [18][19][20] and ABS [21][22][23][24][25] filaments. One of the material models, which is used for structures made by this type of filaments in LS-DYNA, is mat-piecewise-linear-plasticity also.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the core role of GFRP and LDPE on the collapse behavior of absorbers printed with PLA and ABS

Deng

Xie

Liu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Since the advent of polymeric materials, many structures have always been built for engineering purposes. On the one hand, the emergence of composites containing glass fibers has had a significant impact on reducing the weight of structures in various industries. On the other hand, with the advent of 3D printers, many limitations for the geometry of engineering structures were removed. In this research, due to the wide application of these two sciences, a new type of composite absorbers has been introduced. The presented absorbers have glass fiber-reinforced polymer cores (GFRP) or low-density polyethylene cores (LDPE), the shells of each sample are made of PLA or ABS. In this study, 24 different samples were tested under quasi-static loading. The samples were examined in three different groups. In the first group, no cores were used, but in the second group, GFRP cores were used, and in the third group, LDPE cores were used. Triangular, trapezoidal, semielliptical, and square sections were studied, and the results showed that the lowest maximum force was related to samples with semielliptical cross section, then the maximum force increased by changing the cross section from triangular to trapezoidal and then to a square. In addition, the maximum force was higher in the GFRP core than in the LPDE core.

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Low-velocity impact resistance of composite sandwich panels with various types of auxetic and non-auxetic core structures

Cited by 112 publications

References 76 publications

Impact Behavior Analysis of 3-D Printed Honeycomb Structures

Impact Behavior Analysis of 3-D Printed Honeycomb Structures

Finite element procedure to simulate sandwich structure with an auxetic core under impact loading using ABAQUS/Explicit

Experimental study of the core role of GFRP and LDPE on the collapse behavior of absorbers printed with PLA and ABS

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