FE-simulation of machining processes with a new material model

Controlled chip breakage is important for machining process. In order to investigate the chip breakage behaviour in turning process, damage mechanics approach is applied in FE simulation of chip breakage. In this work, an advanced damage mechanics model is implemented for description of the plastic flow and damage behaviour of chip material in simulation. This material model takes the temperature, strain rate as well as state of stress into consideration, which are essential for application in machining processes.

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FE-simulation of machining processes of epoxy with Mulliken Boyce model

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2021.09.026 ◽

2021 ◽

Vol 71 ◽

pp. 134-146

Author(s):

Guoyu Fu ◽

Fengzhen Sun ◽

Dehong Huo ◽

Islam Shyha ◽

Fuzhong Sun ◽

...

Keyword(s):

Fe Simulation ◽

Machining Processes

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A nonlinear hyperelasticity model for single layer blue phosphorus based on ab initio calculations

Proceedings of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rspa.2019.0149 ◽

2019 ◽

Vol 475 (2229) ◽

pp. 20190149 ◽

Cited By ~ 1

Author(s):

Reza Ghaffari ◽

Farzad Shirazian ◽

Ming Hu ◽

Roger A. Sauer

Keyword(s):

Dft Calculations ◽

Density Functional ◽

Single Layer ◽

Material Model ◽

Large Strains ◽

Functional Theory ◽

New Material ◽

Nonlinear Hyperelasticity ◽

Quantum Espresso ◽

Small Deformations

A new hyperelastic membrane material model is proposed for single layer blue phosphorus ( β -P), also known as blue phosphorene. The model is fully nonlinear and captures the anisotropy of β -P at large strains. The material model is calibrated from density functional theory (DFT) calculations considering a set of elementary deformation states. Those are pure dilatation and uniaxial stretching along the armchair and zigzag directions. The DFT calculations are performed with the Quantum ESPRESSO package. The material model is compared and validated with additional DFT results and existing DFT results from the literature, and the comparison shows good agreement. The new material model can be directly used within computational shell formulations that are, for example, based on rotation-free isogeometric finite elements. This is demonstrated by simulations of the indentation and vibration of single layer blue phosphorus sheets at micrometer scales. The elasticity constants at small deformations are also reported.

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A new material model for concrete subjected to intense dynamic loadings

International Journal of Impact Engineering ◽

10.1016/j.ijimpeng.2018.05.006 ◽

2018 ◽

Vol 120 ◽

pp. 60-78 ◽

Cited By ~ 22

Author(s):

Xiangzhen Kong ◽

Qin Fang ◽

Li Chen ◽

Hao Wu

Keyword(s):

Material Model ◽

Dynamic Loadings ◽

New Material

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3D Simulation of Laser Assisted Side Milling of Ti6Al4V Alloy Using Modified Johnson-Cook Material Model

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.554-557.2054 ◽

2013 ◽

Vol 554-557 ◽

pp. 2054-2061 ◽

Cited By ~ 4

Author(s):

Hassan Zamani ◽

Jan Patrick Hermani ◽

Bernhard Sonderegger ◽

Christof Sommitsch

Keyword(s):

Tool Wear ◽

Laser Beam ◽

Cutting Forces ◽

Three Dimensional ◽

Material Model ◽

Element Model ◽

Milling Process ◽

Machining Processes ◽

Side Milling ◽

Three Dimensional Finite Element

During machining of hard materials, one approach to reduce tool wear is using a laser beam to preheat the material in front of the cutting zone. In this study, a new concept of laser-assisted milling with spindle and tool integrated laser beam guiding has been tested. The laser beam is located at the cutting edge and moving synchronously with the cutter. In experiment, a reduction in the resulting process cutting forces and tool wear has been observed in comparison to milling without laser. A three-dimensional finite element model in DEFORM 3D was developed to predict the cutting forces in the milling process with and without an additional laser heat source, based on a Johnson-Cook-type material constitutive model adapted for high strains and strain rates. Both in experiment and simulation, the deformation behavior of a Ti-6Al-4V workpiece has been investigated. The comparison of the resulting cutting forces showed very good agreement. Thus the new model has great potential to further optimize laser assisted machining processes.

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