Enhanced stiffness, strength and energy absorption for co-continuous composites with liquid filler

Liu, Yilun; Wang, Lifeng

doi:10.1016/j.compstruct.2015.03.064

Cited by 39 publications

(7 citation statements)

References 39 publications

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“…Metallic lattice materials have been studied, and their specific properties and energy absorption capabilities were examined and compared with traditional sandwich core materials [5][6][7][8][9]. Specifically, hollow metallic microlattice materials based on advanced microfabrication techniques exhibited promising potential for impact protection [10][11][12][13][14][15][16][17][18]. Additionally, lattice composites, which are hybrids of lattice structures and fiber composites, can yield superior specific properties and populate vacant spaces in low-density regions of materials property charts [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Honeytubes: Hollow lattice truss reinforced honeycombs for crushing protection

Yin

Liu

et al. 2017

Composite Structures

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a b s t r a c tLattice truss reinforced honeycombs (LTRHs), termed honeytubes, were developed based on a hybrid design of micro-lattice truss and square honeycomb topologies. Carbon fiber reinforced composite and polymer LTRHs were fabricated using different manufacturing approaches. Out-of-plane compression tests were performed on the LTRHs, and the properties were compared with the conventional square honeycombs. The stiffness and strength values of composite LTRHs didn't surpass those of composite square honeycombs due to the manually induced defects. On the other hand, polymeric LTRHs with perfect geometries were stiffer and stronger than the corresponding polymeric square honeycombs. A parametric study of the buckling resistance was carried out via finite element analysis, and the results indicated that hollow lattice stiffens honeycombs and increases the resistance to buckling, while the specific properties of honeytubes depend on their geometrical parameters. Moreover, the crush force efficiency and specific energy absorption were greater than those of square honeycombs and hollow lattice. This work demonstrates that hybrid designs that capitalize on micro-topologies can populate vacant regions in mechanical property charts, and provide increased energy absorption as crushing protection structures.

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Section: Introductionmentioning

confidence: 99%

Honeytubes: Hollow lattice truss reinforced honeycombs for crushing protection

Yin

Liu

et al. 2017

Composite Structures

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“…Besides, for the solid filler the bonding strength between the solid filler and the cellular structures should be strong enough to avoid the filler-network mismatch during compression [16,19]. Although the liquid filler can accommodate the compression of the cellular structures very well, sealing of the liquid filler presents a significant challenge [17,20].…”

Section: Introductionmentioning

confidence: 99%

“…The elastic filler may significantly enhance the stiffness, yield strength and energy absorption, in addition to suppression of local buckling of the cellular structures [20]. However, the elastic filler usefully weakens the compressibility of the cellular structures which is a disadvantage of EAMS [19].…”

Section: Introductionmentioning

confidence: 99%

Superelasticity and reversible energy absorption of polyurethane cellular structures with sand filler

Zhou

Deng

Yan

et al. 2015

Composite Structures

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“…As one means of ensuring a uniform distribution of the ller, co-continuous composites using 3D structures have been suggested [2,[10][11][12][13][14][15][16]. Co-continuous composite materials, where two phases are continuously incorporated, can achieve enhancements in the modulus and strength [2,10]. Co-continuous composites are often found in nature or in commercial products based on their increased functionalities.…”

Section: Introductionmentioning

confidence: 99%

High-Strength and High-Resilience PVA+AgNW/PDMS Co-Continuous Nanocomposite for Reusable Shock Absorbers

Kim

Al‐Rub

Han

2022

Preprint

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A 3D co-continuous polymer nanocomposite with high strength and high recoverability is demonstrated. This nanocomposite used hard-core-soft-matrix design which is suitable for obtaining the optimal strength. Polyvinyl alcohol (PVA) was freeze-dried together with silver nanowires (AgNW) to fabricate a 3D porous structure as hard-core phase, which was then filled with polydimethylsiloxane (PDMS) as soft-matrix phase via vacuum infiltration. The PVA + AgNW nanocomposite served as the hard core, with PDMS as the soft matrix, with this hard core-soft matrix design allowing for a combination of the excellent strength of the nanocomposite and the resilience of the PDMS. The addition of AgNWs strengthened the modulus of the freeze-dried structure over the 3 times and the comparison with the Halpin-Tsai model is indicated of AgNWs were well dispersed into the wall of the 3D structure. The vertical pore alignment of the freeze-dried structure resulted in an increased the strength. In addition, incorporation of hard core-soft matrix significantly increased the strength of the 3D nanocomposite up to 3.5 times that of the PDMS as a result of the co-continuous incorporation of hard and soft phases with well distributed 3D interfaces that also hindered crack propagation. Therefore, the PVA + AgNW 3D porous structure contributed by strengthening and toughening of the entire composite, resulting in increasing energy loss coefficients of nanocomposites, which showed good shock absorbance.

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Enhanced stiffness, strength and energy absorption for co-continuous composites with liquid filler

Cited by 39 publications

References 39 publications

Honeytubes: Hollow lattice truss reinforced honeycombs for crushing protection

Honeytubes: Hollow lattice truss reinforced honeycombs for crushing protection

Superelasticity and reversible energy absorption of polyurethane cellular structures with sand filler

High-Strength and High-Resilience PVA+AgNW/PDMS Co-Continuous Nanocomposite for Reusable Shock Absorbers

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