Bending performance and failure behavior of 3D printed continuous fiber reinforced composite corrugated sandwich structures with shape memory capability

Zeng, Chengjun; Liu, Liwu; Bian, Wenfeng; Leng, Jinsong; Liu, Yanju

doi:10.1016/j.compstruct.2021.113626

Cited by 80 publications

(27 citation statements)

References 43 publications

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“…Beam theories, [ 44,45 ] with certain modifications, [ 7,46 ] are usually adopted to analyze the deflection of the sandwich beams. For a three‐layer beam with a corrugated core under three‐point bending, neglecting the slight influence of the shear forces, the deflection

δ_{normalF}

(mm) at its midpoint can be expressed.

δ_{normalF} = \frac{F L^{3}}{48 {false(E J false)}_{eq}}

where

{false(E J false)}_{eq} = E \frac{w h^{3}}{12}

is the equivalent bending stiffness of the multilayer corrugated sandwich beam, which can be expressed as

{(E \frac{w h^{3}}{12})}_{eq} = E_{normalf} \frac{w h_{normalf}^{3}}{6} + E_{normalf} \frac{w h_{normalf} {false(h_{normalc} + h_{normalf} false)}^{2}}{2} + E_{normalc} \frac{w h_{normalf}^{3}}{12}

where,

E,

E_{normalf}

E_{normalc}

are the elastic module of the panel, facings, and corrugated core, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, it was noted in another study [ 7 ] that a corrugated sandwich structure might be more attractive for structural applications if it is made of fiber‐reinforced composites (FRC). This is because FRC sandwich structures reduce the structure's weight and increase their stiffness by designing the mechanical properties of the components.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bending Performance and Failure Behavior of Wooden Sandwich Panels with Corrugated Cores

Smardzewski

Krzyżaniak

Wojciechowski

et al. 2022

Physica Status Solidi (b)

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Wooden sandwich panels with a corrugated core have not been the subject of scientific research so far. The anisotropic properties of the wood make it challenging to form corrugated shapes. Therefore, it is decided to determine the effect of geometric imperfections of the corrugated core made of wood veneers on the stiffness and strength of sandwich panels and the core elasticity modulus. The beams are manufactured in industrial conditions and subjected to three‐point bending. The research is carried out in the form of tests and numerical calculations. It is demonstrated that geometric imperfections of the core affect the stiffness and strength of sandwich panels. The modulus of elasticity can reach values lower by up to 37% and the strength by up to 24% compared with reference panels with an ideal, symmetrical core geometry. However, their average linear elasticity modulus (1449 MPa) indicates excellent construction properties. Under the tests, four stages of beam bending are revealed. The last stage means that panels can increase stiffness even after the core is destroyed. The corrugated core's modulus of elasticity is also determined.

show abstract

δ_{normalF}

(mm) at its midpoint can be expressed.

δ_{normalF} = \frac{F L^{3}}{48 {false(E J false)}_{eq}}

where

{false(E J false)}_{eq} = E \frac{w h^{3}}{12}

is the equivalent bending stiffness of the multilayer corrugated sandwich beam, which can be expressed as

{(E \frac{w h^{3}}{12})}_{eq} = E_{normalf} \frac{w h_{normalf}^{3}}{6} + E_{normalf} \frac{w h_{normalf} {false(h_{normalc} + h_{normalf} false)}^{2}}{2} + E_{normalc} \frac{w h_{normalf}^{3}}{12}

where,

E,

E_{normalf}

E_{normalc}

are the elastic module of the panel, facings, and corrugated core, respectively.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bending Performance and Failure Behavior of Wooden Sandwich Panels with Corrugated Cores

Smardzewski

Krzyżaniak

Wojciechowski

et al. 2022

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

“…Therefore, using the FFF process, hybrid composite laminates were manufactured that showed better mechanical properties [ 41 , 42 ] compared to conventional materials. Zeng et al [ 43 ] analyzed the static performance of continuous fiber reinforced composite trapezoidal corrugated sandwich structures with shape-memory capability manufactured by the FFF process. It was found that the studied structures can offer new opportunities for use in lightweight systems and multifunctional applications through the studied concept of shape recovery.…”

Section: Introductionmentioning

confidence: 99%

Compression and Bending Properties of Short Carbon Fiber Reinforced Polymers Sandwich Structures Produced via Fused Filament Fabrication Process

et al. 2022

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Additive manufacturing, through the process of thermoplastic extrusion of filament, allows the manufacture of complex composite sandwich structures in a short time with low costs. This paper presents the design and fabrication by Fused Filament Fabrication (FFF) of composite sandwich structures with short fibers, having three core types C, Z, and H, followed by mechanical performance testing of the structures for compression and bending in three points. Flatwise compression tests and three-point bending have clearly indicated the superior performance of H-core sandwich structures due to dense core structures. The main modes of failure of composite sandwich structures were analyzed microscopically, highlighting core shear buckling in compression tests and face indentation in three-point bending tests. The strength–mass ratio allowed the identification of the structures with the best performances considering the desire to reduce the mass, so: the H-core sandwich structures showed the best results in compression tests and the C-core sandwich structures in three-point bending tests. The feasibility of the FFF process and the three-point bending test of composite wing sections, which will be used on an unmanned aircraft, have also been demonstrated. The finite element analysis showed the distribution of equivalent stresses and reaction forces for the composite wing sections tested for bending, proving to validate the experimental results.

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“…Zhang et al [8]compared the crushing performance of shell structures with triangular-, hexagonal-, NPR-(negative Poisson ratio) structures as in ll structures, which demonstrates a very large differences in terms of energy absorption under both quasi-static compression and impact conditions. Zeng et al [9,10]discussed the differences in failure modes and positions of shell-in ll structures by changing the corrugation angle in compression and three-point bending experiments.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and energy-absorption of integrated AlSi10Mg shell structures with BCC lattice infill

Bai

Gao

Huang

2022

Preprint

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Shell-infill structures consist of exterior solid shell and interior lattice infill, whose closed feature leads to superior comprehensive mechanical performances yet light weight. Additive manufacturing (AM) increases the industrial popularities of shell-infill structures due to its capability to fabricate such complicated integrated structures. However, mechanical performances of integrated manufactured shell structures with lattice infill are still lack of systematic investigation to guide practical application. In this paper, mechanical properties and energy absorption of AlSi10Mg shell structures with BCC (Body Center Cubic) lattice infill by additive manufacturing are investigated. Both quasi-static compressive experiments and corresponding finite element analysis are conducted to investigate the mechanical behaviors. In addition, two different finite element modelling methods are compared to determine the appropriate modelling strategy because combination of shell structures and BCC lattice infill increases the simulations challenges to predict the shell and lattice deformation simultaneously. The results show that the shell-infill structures have a large improvement compared to the lattice structure. The exterior solid shell can enhance the equivalent Young’s modulus by up to 2.3 times. Meanwhile, increasing the infill strut diameter is more conducive to improvement of specific energy absorption by up to 1.6 times.

show abstract

Bending performance and failure behavior of 3D printed continuous fiber reinforced composite corrugated sandwich structures with shape memory capability

Cited by 80 publications

References 43 publications

Bending Performance and Failure Behavior of Wooden Sandwich Panels with Corrugated Cores

Bending Performance and Failure Behavior of Wooden Sandwich Panels with Corrugated Cores

Compression and Bending Properties of Short Carbon Fiber Reinforced Polymers Sandwich Structures Produced via Fused Filament Fabrication Process

Mechanical properties and energy-absorption of integrated AlSi10Mg shell structures with BCC lattice infill

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