Modeling loading rate effect on crushing stress of metallic cellular materials

Ma, Guowei; Ye, Z.Q.; Shao, Zhushan

doi:10.1016/j.ijimpeng.2008.11.013

Cited by 74 publications

(48 citation statements)

References 23 publications

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“…The dynamic friction coefficient was assumed to be 0.2. It was found that the simulation results were not sensitive to the friction coefficient through simple parametric study (Ma et al, 2009;Li and Meng, 2002). In the simulation, we adopted the explicit way and did not use any the mass scaling method, while just endowed the impact plate with a certain constant velocity.…”

Section: Finite Element Modelsmentioning

confidence: 99%

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Dynamic crushing of uniform and density graded cellular structures based on the circle arc model

Zhang

Wei

Wang

et al. 2015

Lat. Am. j. solids struct.

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A new circle-arc model was established to present the cellular structure. Dynamic response of models with density gradients under constant velocities is investigated by employing Ls-dyna 971. Compared with the uniform models, the quasi-static plateau stress of different layers seems a significant parameter correlated with the deformation mode except for inertia effect when the density gradient is introduced. The impact velocity becomes much more vital on the deformation of the unit cell than the density gradient. The stress at both the impact and stationary sides is investigated in details. Furthermore, the stress-strain curve is compared with the modified shock wave theory. The density gradient does have some remarkable influence on the energy absorption capability, and a certain density gradient is not always beneficial to the energy absorption. Irrespective of the impact velocity, there seems always a critical strain where the energy absorbed by all these specimens could approximate to nearly the same value. So the critical strain-velocity curve is plotted and gives the beneficial area for energy absorption pertinent to density gradients and impact velocity.

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Section: Finite Element Modelsmentioning

confidence: 99%

“…These models had different ratio of the length H to the width L. L d for the models were large enough. Nominal stress and nominal strain were commonly defined in the literatures (Li et al, 2014;Zheng et al, 2005;Ma et al, 2009) as…”

Section: Model Verificationmentioning

confidence: 99%

Dynamic crushing of uniform and density graded cellular structures based on the circle arc model

Zhang

Wei

Wang

et al. 2015

Lat. Am. j. solids struct.

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“…From the work of different researchers, it was easily found that the honeycomb, if used as a filler, can absorb a lot of energy (quasi-static and dynamic) when subjected to axial loadings. However, the dynamic compressive strength of honeycomb is found better than the antipodal quasi-static one [11][12][13][14]. The axial crushing resistance of honeycomb filled square tube was studied by Santosa [17].…”

Section: Introductionmentioning

confidence: 99%

Finite element Analysis of Honeycomb filled Metallic Tubes Subjected to Axial Loading

Beg¹,

Khan²,

Umer³

et al. 2018

IJAERS

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“…The existing study pay much attention to the former two aspects. Some researchers point that the dynamic stress enhancement in metal foams under dynamic impact is mainly caused by inertia effect, other than strain rate effect of base material [3,4], however, some other researchers hold the opposite point [5,6]. As for the stress wave propagation, some idealized stress strain models, such as RPPL, RLHPL, EPPL etc.…”

Section: Introductionmentioning

confidence: 99%

Investigation into stress wave propagation in metal foams

Xue

Chen

2015

EPJ Web of Conferences

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Abstract. The aim of this study is to investigate stress wave propagation in metal foams under high-speed impact loading. Threedimensional Voronoi model is established to represent real closed-cell foam. Based on the one-dimensional stress wave theory and Voronoi model, a numerical model is developed to calculate the velocity of elastic wave and shock wave in metal foam. The effects of impact velocity and relative density of metal foam on the stress wave propagation in metal foams are explored respectively. The results show that both elastic wave and shock wave propagate faster in metal foams with larger relative density; with increasing the impact velocity, the shock wave propagation velocity increase, but the elastic wave propagation is not sensitive to the impact velocity.

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Modeling loading rate effect on crushing stress of metallic cellular materials

Cited by 74 publications

References 23 publications

Dynamic crushing of uniform and density graded cellular structures based on the circle arc model

Dynamic crushing of uniform and density graded cellular structures based on the circle arc model

Finite element Analysis of Honeycomb filled Metallic Tubes Subjected to Axial Loading

Investigation into stress wave propagation in metal foams

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