Impact loading of functionally graded metal syntactic foams

Movahedi, Nima; Fiedler, Thomas; Taşdemirci, Alper; Murch, Graeme E.; Belova, Irina V.; Güden, Mustafa

doi:10.1016/j.msea.2022.142831

Cited by 27 publications

(7 citation statements)

References 32 publications

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“…Based on the optimized pore-size distribution and relative density, functional gradient lattice structures (FGLs) are of increasing interest for their potential to enable the tailoring of structural responses and development of multifunctional applications and are widely used in the biomedical and aerospace spheres [ 1 , 2 , 3 ]. The lattice structure can be divided into a stochastic lattice structure and non-stochastic lattice structure [ 4 ], such as functionally graded metal syntactical foams [ 5 , 6 , 7 ], closed-cell foams [ 8 , 9 , 10 ], and open-cell foams [ 11 ], which have random distribution characteristics and are defined as a stochastic lattice structure; meanwhile, the lattice structure formed by repeating a unit cell arrangement is classified as a non-stochastic lattice structure. However, it is difficult for traditional manufacturing techniques, such as melt gas injection [ 12 ], physical vapor deposition [ 13 ], and sheet metal technology [ 14 ], to produce complex lattice structures with high precision and costly manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Influence of Density Gradient on the Compression of Functionally Graded BCC Lattice Structure

et al. 2023

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In this paper, five grading functional gradient lattice structures with a different density perpendicular to the loading direction were proposed, and the surface morphology, deformation behavior, and compression properties of the functional gradient lattice structures prepared by selective laser melting (SLM) with Ti-6Al-4V as the building material were investigated. The results show that the characteristics of the laser energy distribution of the SLM molding process make the spherical metal powder adhere to the surface of the lattice structure struts, resulting in the actual relative density of the lattice structure being higher than the designed theoretical relative density, but the maximum error does not exceed 3.33%. With the same relative density, all lattice structures with density gradients perpendicular to the loading direction have better mechanical properties than the uniform lattice structure, in particular, the elastic modulus of LF, the yield strength of LINEAR, and the first maximum compression strength of INDEX are 28.99%, 16.77%, and 14.46% higher than that of the UNIFORM. In addition, the energy absorption per unit volume of the INDEX and LINEAR is 38.38% and 48.29% higher, respectively, than that of the UNIFORM. Fracture morphology analysis shows that the fracture morphology of these lattice structures shows dimples and smooth planes, indicating that the lattice structure exhibits a mixed brittle and ductile failure mechanism under compressive loading. Finite element analysis results show that when the loading direction is perpendicular to the density gradient-forming direction, the higher density part of the lattice structure is the main bearing part, and the greater the density difference between the two ends of the lattice structure, the greater the elastic modulus.

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Section: Introductionmentioning

confidence: 99%

Influence of Density Gradient on the Compression of Functionally Graded BCC Lattice Structure

et al. 2023

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“…Foamed materials (or foams for brevity) possess low relative density and high energy absorption capacity [1], which are finding increasing applications as impact and shock mitigators in automotive [2], aerospace [3] and defense [4] industries. Their stochastic and topologically irregular unit cells enable them to undergo gross deformation at nearly constant plateau stress if cell walls do not fracture during compression [5,6]. The mechanical performance of foams is limited by the traditional manufacturing methods, which are impossible and impractical to fabricate consistent cell microstructures or to tailor the mechanical properties through precise unit-cell design.…”

Section: Introductionmentioning

confidence: 99%

Deformation and failure of additively manufactured Voronoi foams under dynamic compressive loadings

Yuan

Zhang

Ruan

et al. 2023

Engineering Structures

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“…Syntactic foam is a composite material consisting of a matrix filled with hollow microspheres [29]. The microspheres, which are typically made of glass [30,31], ceramic [32,33], or polymer, are dispersed throughout the matrix material, which can be made from polymers [34,35], metals [36][37][38], or concrete and ceramics [39][40][41][42]. Metal foams have lightweight and high-energy absorption properties.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characteristics of High-Performance, Low-Density Metallo–Ceramics Composite

Abramovskis,

Drunka,

Csáki

et al. 2023

Materials

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By applying the physical vapour deposition method, hollow ceramic microspheres were coated with titanium, and subsequently, they were sintered using the spark plasma sintering technique to create a porous ceramic material that is lightweight and devoid of a matrix. The sintering process was carried out at temperatures ranging from 1050 to 1200 °C, with a holding time of 2 min. The samples were subjected to conventional thermal analyses (differential scanning calorimetry, thermogravimetry, dilatometry), oxidation resistance tests, and thermal diffusivity measurements. Phase analysis of the samples was performed using the XRD and the microstructure of the prepared specimens was examined using electron microscopy. The titanium coating on the microspheres increased the compressive strength and density of the resulting ceramic material as the sintering temperature increased. The morphology of the samples was carefully examined, and phase transitions were also identified during the analysis of the samples.

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Impact loading of functionally graded metal syntactic foams

Cited by 27 publications

References 32 publications

Influence of Density Gradient on the Compression of Functionally Graded BCC Lattice Structure

Influence of Density Gradient on the Compression of Functionally Graded BCC Lattice Structure

Deformation and failure of additively manufactured Voronoi foams under dynamic compressive loadings

Preparation and Characteristics of High-Performance, Low-Density Metallo–Ceramics Composite

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