Bending strength and failure of single-layer and double-layer sandwich structure with graded truss core

Sun, Yang; Guo, Licheng; Wang, Tianshu; Yao, Liaojun; Sun, Xiaohan

doi:10.1016/j.compstruct.2019.111204

Cited by 34 publications

(27 citation statements)

References 20 publications

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“…8 Recently, truss lattice structures became attractive due to their superior performance in comparison with foams. [9][10][11][12][13][14][15][16] Lattice structures are periodic arrays that are designed by copying a unit cell that is repeated in space. 17,18 The unit cell is composed of rods or struts.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of core lattice topology on the properties of sandwich panels produced by additive manufacturing

Monteiro

Sardinha

Alves

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Sandwich structures are frequently used in automotive, aerospace and marine industries, as they provide adequate functional properties. The two-dimensional regular hexagonal cell shape, i.e. honeycomb is the most used core structure in sandwich panels. Recently, a new type of cellular structures composed of lattice struts has been proposed, as they combine high stiffness, strength and energy absorption with low weight. The main purpose of this research is to investigate the effect of the lattice topology on the flexural behaviour of sandwich panels. Five lattice geometries inspired in crystalline structures were designed, namely, body-centred parallelepiped, body-centred parallelepiped with struts in z-axis, body- and face-centred parallelepiped with struts in z-axis, face-centred parallelepiped with struts in z-axis and parallelepiped simple. The relative density of all the lattices was kept constant as 0.3. Both numerical and experimental approaches were used to evaluate the flexural properties and failure behaviour of the sandwich structures under three-point bending tests. The numerical analysis was undertaken with the finite element software NX Nastran. Taking advantage of additive manufacturing technologies, material extrusion was used to produce polylactic acid samples with the configurations aforementioned. The sandwich panels are composed by a single layer formed by the lattice core and two thin plates, at the bottom and top. The three parts of the panel were manufactured all together. The simulation results indicate that, among the lattices studied, topologies body-centred parallelepiped with struts in z-axis and body- and face-centred parallelepiped with struts in z-axis exhibit higher strength, while body- and face-centred parallelepiped with struts in z-axis shows higher stiffness and higher energy absorption, attaining values that do not differ much from the ones obtained with a two-dimensional hexagonal cellular structure, with the same relative density. As a consequence, some of the geometries studied may have the potential to be considered as alternatives to conventional structures in the design of sandwich structures.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of core lattice topology on the properties of sandwich panels produced by additive manufacturing

Monteiro

Sardinha

Alves

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

show abstract

“…It was stated that the ceramic tile largely improved the strength and stiffness of sandwich structure, and bending behaviour of ceramic sandwich mainly depended on the thickness of the ceramic tile, the thickness of honeycomb wall and the length of honeycomb cells. 222 Sun et al 228 studied the bending behaviour of single-layer and double-layer sandwich structure with graded truss core, which indicated that the gradient ratio was prominently affected the failure mode of truss core. It is mentioned that the doublelayer concept of sandwich structure can significantly enhance the strength and stiffness properties.…”

Section: Three-point Bending Testmentioning

confidence: 99%

“…222 Sun et al. 228 studied the bending behaviour of single-layer and double-layer sandwich structure with graded truss core, which indicated that the gradient ratio was prominently affected the failure mode of truss core. It is mentioned that the double-layer concept of sandwich structure can significantly enhance the strength and stiffness properties.…”

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

147

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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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“…Deland et al [11] presented the biaxial failure of woven fabric composite plates under the bending standard test. Sun et al [12] presented some comparisons between results from three-point bending tests and finite element models based on Hashin's criteria,... However, there are no previous studies that mentioned failure analysis of folded composite plate.…”

Section: Nowadaysmentioning

confidence: 99%

Determination of Bending Failure Load of Hat-Type Folded Composite Plate Using Finite Element Method

Bui

Tran

Tú

2020

JST

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Structural failure is initiated when a material is stressed beyond its strength limit. Determination of failure loads and failure location is one of the most important problems in design structures. This paper analyzed the failure of the hat-type laminated composite plate under a bending load. Based on the Reissner-Mindlin plate theory and isoparametric rectangular plate elements with five degrees of freedom per node, an algorithm and Matlab code were established to compute the stresses and bending failure load of the folded composite plate according to Tsai-Wu and Maximum stresses criteria. The numerical results are reliable when compared with the published results in the literature for some specific cases.

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Bending strength and failure of single-layer and double-layer sandwich structure with graded truss core

Cited by 34 publications

References 20 publications

Evaluation of the effect of core lattice topology on the properties of sandwich panels produced by additive manufacturing

Evaluation of the effect of core lattice topology on the properties of sandwich panels produced by additive manufacturing

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

Determination of Bending Failure Load of Hat-Type Folded Composite Plate Using Finite Element Method

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