Failure mechanism of sandwich beams subjected to three-point bending

Jiang, Bingnan; Li, Zhibin; Lu, Fangyun

doi:10.1016/j.compstruct.2015.07.056

Cited by 79 publications

(21 citation statements)

References 15 publications

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“…Many research results can be found in the aspects of quasi static, dynamic and energy absorption characteristics. In the studies of Steeves et al [16], Jiang et al [17] and Vitale et al [18], the collapse of a sandwich beam under three-point bending was analyzed through several types of failure events: core shear, face micro buckling, facesheet indentation and core crushing, depending on the geometry and density of the foam core. The dominant regimes of each collapse mode were marked out by drawing failure maps.…”

Section: Introductionmentioning

confidence: 99%

Low velocity failure and integrity assessment of foam core sandwich panels

Mocian

Constantinescu

Sorohan

et al. 2019

Frattura Ed Integrità Strutturale

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Impact resistance and energy absorbing capability are of great interest in the design of composite sandwich structures. This paper experimentally studies damage, failure and energy absorption properties of foam core sandwich panels with aluminum and glass fiber reinforced plastic (GFRP) facesheets subjected to low velocity impact. Tests are performed using a drop weight impact tower at different impact velocities. The energy absorbing capabilities of aluminum and composite facesheet sandwich panels with PUR and PS foam core are evaluated by means of absorbed energy-time histories and by specific parameters as normalized absorbed energy, specific energy absorption, and crush force efficiency. Stiffer panels behave better at lower impact velocities, while more ductile ones do better if impact energy is increased.

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Section: Introductionmentioning

confidence: 99%

Low velocity failure and integrity assessment of foam core sandwich panels

Mocian

Constantinescu

Sorohan

et al. 2019

Frattura Ed Integrità Strutturale

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“…The bending behaviour of sandwich structures with various core structures have been extensively investigated, which involves honeycombs, 205,221–223 pyramidal lattices, 52,224 corrugated 22,189,225,226 and foam cores. 227 Recent studies on sandwich structures with different core structures under three-point bending test are summarized in Table 8, which includes the core structure, span distance and failure modes. The schematic diagram of the experimental setup of three-point bending test is illustrated in Figure 30.…”

Section: Impact Performance Of Sandwich Structurementioning

confidence: 99%

A review of the recent trends on core structures and impact response of sandwich panels

Rejab

Siregar

et al. 2021

Journal of Composite Materials

148

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It is a challenging task to advance the excellent strength and structural performance of sandwich structures, while continuing to reduce the weight and cost parameters. Thousands of researchers have studied and developed the core structural innovation with periodical achievements. This review paper concentrates on the core structural trends and impact response of sandwich panels, which highlights the novel design concepts and impact failure modes. Three kinds of core structures have been classified, which are foam-core, two- and three-dimensional periodic cores. It is shown that the core structure of sandwich panels plays a vital role in structural performance and applications. Three common types of loading conditions have been considered, i.e. compression, projectile impact and three-point bending. Examples of novel core structures are further studied and summarised under corresponding impact loadings. Recent applications of sandwich structures are briefly concentrated on aerospace, automotive, marine and civil engineering areas. Furthermore, future research and development prospect of sandwich structures are suggested and predicted.

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“…This study aims to update the traditional collapse maps by showing how the core shape can improve the sandwich beam performance. The collapse maps proposed are based on advanced analytical models than the traditional Gibson theories [5,6]. The analytical modelling of the indentation phenomenon is based on Vlasov's model [7,8].…”

Section: Introductionmentioning

confidence: 99%

Influence of Core Cellular Structures on Collapse Mechanisms Maps of Sandwich Beams

Utzeri

Morichelli

Lattanzi

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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The main advantage of 3D printing is manufacturing complex and innovative shapes which guarantee high mechanical properties. Therefore, it is necessary easily figure out the most suitable structure for the required design requirements. The well-known strategy to design sandwich panels is evaluating collapse maps as they determine the panel performances based on their geometrical features. The aim of this study is to update the traditional collapse maps by showing how the core shape can improve the sandwich beam performance. The collapse maps proposed are based on advanced analytical models than the traditional Gibson theories. The analytical modelling of the indentation phenomenon is based on Vlasov’s model. The analytical modelling of the bending phenomenon is based on the First Shear Order Theory. The overall panel stress and strain maps are computed superposing both effects. A composite sandwich panels with Gyroid core based are analyzed to verify the proposed model consistency. A core failure criterion is chosen by experimental testing evidence on the representative core structure. Once the computed stress state overtakes failure criterion ones, the critical load is defined. In the end, the model is exploited to compare the performances of four sandwich panels with cores based on different lattice structures.

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Failure mechanism of sandwich beams subjected to three-point bending

Cited by 79 publications

References 15 publications

Low velocity failure and integrity assessment of foam core sandwich panels

Low velocity failure and integrity assessment of foam core sandwich panels

A review of the recent trends on core structures and impact response of sandwich panels

Influence of Core Cellular Structures on Collapse Mechanisms Maps of Sandwich Beams

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