Study of Al-alloy foam compressive behavior based on instrumented sharp indentation technology

Kim, Amkee; Tunvir, K.

doi:10.1007/bf02915945

Cited by 16 publications

(2 citation statements)

References 11 publications

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“…Due to the sensitive plasticity of aluminum, the plastic strain will occur around the tungsten wire, resulting in a small "breach" [18]. The goal of this step is to generate enough power for cutting aluminum foil as well as to produce the breach for stress concentration [19]. The wire feeding rate in this step namely initial velocity is relatively slow, usually ranging from 10 μm•s −1 to 50 μm•s −1 .…”

Section: Principlementioning

confidence: 99%

Micro-Slit Cutting in an Aluminum Foil Using an Un-Traveling Tungsten Wire

Zhu

Fang

2020

Applied Sciences

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Microslit cutting in aluminum foils is considered to be difficult as aluminum foils have low hardness and deformability. In this study, a novel cutting method is proposed where a tungsten microwire is utilized as the tool to cut aluminum foil without tool traveling or spinning. A statics simulation is first performed to analyze the cutting mechanism. Further, a tungsten wire with a diameter of 50 μm is utilized as the tool and a series of experiments are carried to discuss how the feeding rate influences slit width and roughness. With optimal parameters, it takes only 100 s to fabricate a 5 mm long microslit with an average width of 48.75 μm, width standard deviation of 1.48 μm, and surface roughness of 0.110 μm when applying initial/secondary velocity of 50/50 μm·s−1.

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Section: Principlementioning

confidence: 99%

Micro-Slit Cutting in an Aluminum Foil Using an Un-Traveling Tungsten Wire

Zhu

Fang

2020

Applied Sciences

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“…Another measurement method using nanoindentation has been recently introduced to measure cell wall mechanical properties (Kim and Tunvir, 2006;Hasan et al, 2008). This method, however, has some difficulties in obtaining actual cell wall mechanical properties: it usually uses the indentation load-displacement curves, which include considerable variations arising from the inhomogeneous microstructure of the cell wall cross section, and can not account for the effect of cell wall oxidation in the measurement of the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Cell wall mechanical properties of closed-cell Al foam

Jeon

Katou

Sonoda

et al. 2009

Mechanics of Materials

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Finite element simulation of nanoindentation tests using a macroscopic computational model

Khelifa¹,

Fierro²,

Celzard³

2014

J Mech Sci Technol

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International audienceThe aim of this work was to develop a numerical procedure to simulate nanoindentation tests using a macroscopic computational model. Both theoretical and numerical aspects of the proposed methodology, based on the coupling of isotropic elasticity and anisotropic plasticity described with the quadratic criterion of Hill are presented to model this behaviour. The anisotropic plastic behaviour accounts for the mixed nonlinear hardening (isotropic and kinematic) under large plastic deformation. Nanoindentation tests were simulated to analyse the nonlinear mechanical behaviour of aluminium alloy. The predicted results of the finite element (FE) modelling are in good agreement with the experimental data, thereby confirming the accuracy level of the suggested FE method of analysis. The effects of some technological and mechanical parameters known to have an influence during the nanoindentation tests were also investigated

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Study of Al-alloy foam compressive behavior based on instrumented sharp indentation technology

Cited by 16 publications

References 11 publications

Micro-Slit Cutting in an Aluminum Foil Using an Un-Traveling Tungsten Wire

Micro-Slit Cutting in an Aluminum Foil Using an Un-Traveling Tungsten Wire

Cell wall mechanical properties of closed-cell Al foam

Finite element simulation of nanoindentation tests using a macroscopic computational model

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