High speed cryogenic machining

 

 

 

High speed cryogenic machining

Abstract

In this paper, a new approach for evaluating the cryogenic machining process of the carbon nanotube reinforced aluminum matrix composites is developed based on finite element method.

Finite element modeling in commercial code ABAQUS/Explicit was used to simulate high-speed machining of carbon nanotube reinforced composites under dry and cryogenic conditions, where different parameters (carbon nanotubes loading and the cutting speed) were investigated.

The matrix phases are given a Johnson–Cook failure criterion.

 

 

 

 

 

 

 

For considering more realistic assumptions, mechanical and thermal properties of the materials are assumed as a function of temperature.

Results shown that at the cutting velocity of 60 m/s, cryogenic cooling has caused decrease of work piece plastic strain by 12% in comparison with the dry cooling.

The model can be used to study the effect of weight fraction, orientation, and length of the carbon nanotubes on the manufacturing of the nanocomposites.

Introduction

Nanocomposites reinforced with carbon nanotube (CNT) have numerous applications including their uses in the light/weight structures, actuators, the micro-fluidic devices, and the bio-medical implants. The significant mechanical properties of the carbon nanotubes, such as ultra-high tensile strength and Young’s modulus, make them the most ideal and reinforcing agent for ultra-high strength reinforcement in the high-performance engineering CNT/polymer or reinforced composites.

 

 

 

 

 

 

 

 

Conclusion

In this paper, cryogenic machining of the CNT reinforce composite with two different material including CNTs as fibers and aluminum matrix were studied.

Two-dimensional finite element model was applied for the simulating carbon nanotubes, the surrounding material, and the interaction regions between the The presented model can benefit to improve machining of the novel generation of CNTs reinforced metal matrix composite with improved control on the interfacial properties.

 

 

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