The influence of lattice structure on the dynamic performance of metal hollow sphere agglomerates

Liu, Ying; Wu, Hexiang; Zhang, Xinchun; Wang, B.

doi:10.1016/j.mechrescom.2011.07.011

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…Besides, a surface-to-surface contact is applied between the specimen and two rigid plates, respectively, without considering the contact friction. More details on the numerical simulations were described in our previous work [21, 26, 31, 32].…”

Section: Methodology and Modelmentioning

confidence: 99%

The influence of cell micro-structure on the in-plane dynamic crushing of honeycombs with negative Poisson’s ratio

Zhang

Ding

et al. 2014

Jnl of Sandwich Structures & Materials

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126

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The in-plane dynamic crushing behaviors and energy-absorbed characteristics of honeycombs with negative Poisson’s ratio (NPR) have been studied by means of explicit dynamic finite element analysis (DFEA) using ANSYS/LS-DYNA. First, the honeycomb models filled with different reentrant cells by the variation of micro-cell configuration parameters (cell-wall angle and shape ratio) are established. The respective influences of micro-structure and impact velocities on the deformation behaviors, the dynamic plateau stresses and the absorbed energy of reentrant honeycombs are explored in detail. It is shown that owing to the variation of cell micro-structure, reentrant honeycombs display different macro-/micro- deformation properties during the crushing. For the given impact velocity, the dynamic plateau stresses are related to the shape ratio by a power law and to the cell-wall angle by least-square curves. And they are also proportional to the square of impact velocities for a high impact velocity. Based on the finite element simulated results and one-dimensional shock wave theory, an empirical formula for auxetic honeycomb to predict the dynamic plateau stress is derived in terms of relative density and impact velocity.

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Section: Methodology and Modelmentioning

confidence: 99%

The influence of cell micro-structure on the in-plane dynamic crushing of honeycombs with negative Poisson’s ratio

Zhang

Ding

et al. 2014

Jnl of Sandwich Structures & Materials

Self Cite

126

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“…Here we restrict ourselves to the simple cubic lattice as an example of MHS functionally graded material. The influence of the lattice structures on the performance of MHSS could refer to [13].…”

Section: Methodsmentioning

confidence: 99%

“…(8) and (9), especially under a higher crush velocity (V>V s ), where of the shock wave theory applies [17,18]. Since the influence of lattice structures could be ignored [13] under a higher velocity crush, the formula is also available to the MHS foams with other lattice structures.…”

Section: a Model Of Density-graded Mhs Foam (Composed By Layers Of mentioning

confidence: 99%

Gradient design of metal hollow sphere (MHS) foams with density gradients

Liu

Wang

2012

Composites Part B: Engineering

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SMetal hollow sphere (MHS) structures with a density gradient have attracted increasing attention in the effort to pursue improved energy absorption properties. In this paper, dynamic crushing of MHS structures are discussed. MHS of different gradients are modelled by stacks of hollow spheres of the same external diameter but different wall thicknesses in the crushing direction. Then based on the dynamic performance of MHS structures with uniform density, a crude semi-empirical model is developed, showing the effect of density gradient in energy absorption and protection against dynamic crush. The model provides some guidance in the design of MHS structures. Following this, dynamic responses of density graded MHS foams are analyzed using explicit finite element simulation and the proposed formula. Results show that the simple semi-empirical model can predict the response of density gradient MHS foams, thus be used for the gradient design of MHS structures.

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“…F represents the reacting force of the loading plate; δ denotes the displacement of the loading end; m is the mass of the porous material; and ρ is the density. In this study, ε D is determined as the strain corresponding to the stationary point in the efficiency-strain curve where the efficiency E(ε) provides the last local maximum [29]:…”

Section: Effect Of Geometric Parametersmentioning

confidence: 99%

Large Deformation and Energy Absorption Behaviour of Perforated Hollow Sphere Structures under Quasi-Static Compression

et al. 2021

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Hollow sphere structures with perforations (PHSSs) in three different arrangements (simple cubic (SC), body-centred cubic (BCC), and face-centred cubic (FCC)) were fabricated through three-dimensional (3D) printing, and the mechanical behaviours of these PHSSs under quasi-static compression were investigated experimentally and numerically. The results indicated that under uniaxial compression, the PHSSs mainly undergo three stages, i.e., a linear elastic stage, a large deformation or plateau stage, and a densification stage. During the stage of large deformation, the SC and BCC PHSSs experience a preliminary compaction sub-stage after layer-by-layer buckling, while for the FCC PHSS, layer-by-layer collapse and compaction are the dominant deformation behaviours. A numerical simulation was employed to study the mechanical properties of PHSSs with different geometric parameters under quasi-static compression and to explore the effect of the wall thickness, hole diameter, and sphere arrangement on the first peak stress, plateau stress, and specific energy absorption (SEA) of the PHSSs. The results reveal that the geometric parameters have a significant impact on the large deformation behaviour and energy absorption capacity of PHSSs. The presented PHSS is also proven to be much lighter than traditional metallic hollow sphere structure (MHSS) and has higher specific strength and SEA.

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The influence of lattice structure on the dynamic performance of metal hollow sphere agglomerates

Cited by 9 publications

References 13 publications

The influence of cell micro-structure on the in-plane dynamic crushing of honeycombs with negative Poisson’s ratio

The influence of cell micro-structure on the in-plane dynamic crushing of honeycombs with negative Poisson’s ratio

Gradient design of metal hollow sphere (MHS) foams with density gradients

Large Deformation and Energy Absorption Behaviour of Perforated Hollow Sphere Structures under Quasi-Static Compression

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