Numerical modeling of micro-friction and fiber orientation effects on the machinability of green composites

This paper aims to enhance the predictiveness of a finite element (FE) model for machining of natural fiber composites through a tribological approach based on the micro-friction phenomenon between the cutting tool and the components of the composite structure. A 2D micromechanical model for orthogo...

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Bibliographic Details
Published in:Tribology international 2020-10, Vol.150, p.106380, Article 106380
Main Authors: Chegdani, Faissal, El Mansori, Mohamed, Chebbi, Amen-Allah
Format: Article
Language:English
Subjects:
Coefficient of friction
Composite structures
Cutting tools
Engineering Sciences
Fiber composites
Fiber orientation
Finite element method
Finite element modeling
Flax
Friction
Machinability
Machining
Mathematical analysis
Mathematical models
Mechanics
Microscale friction
Natural fiber composites
Orientation effects
Thrust
Tribology
Two dimensional models
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Summary:This paper aims to enhance the predictiveness of a finite element (FE) model for machining of natural fiber composites through a tribological approach based on the micro-friction phenomenon between the cutting tool and the components of the composite structure. A 2D micromechanical model for orthogonal cutting of flax fibers reinforced polylactic-acid (PLA) composites is considered in this study at different orientation of fibers. Results show that the numerical thrust forces are significantly affected by the variation of the micro-friction in the model. An optimized value of the micro-friction coefficient has been found to fit with the experimental results. The FE model provides the ability to calculate with good accuracy the effect of fiber orientation on the machinability of flax/PLA composites. •Finite element model for machining of natural fiber composites is improved.•The optimization concerns the correlation issues of thrust forces.•Tribological approach based on contact friction is considered to improve the model.•Numerical cutting forces are not sensitive to the variation of the micro-friction.•Numerical Thrust forces are highly affected by the variation of the micro-friction.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2020.106380