Constitutive Modeling for Ti-6Al-4V Alloy Machining Based on the SHPB Tests and Simulation

A constitutive model is critical for the prediction accuracy of a metal cutting simulation. The highest strain rate involved in the cutting process can be in the range of 104-106 s 1. Flow stresses at high strain rates are close to that of cutting are difficult to test via experiments. Split Hopkins...

Celý popis

Uložené v:
Podrobná bibliografia
Vydané v:Chinese journal of mechanical engineering Ročník 29; číslo 5; s. 962 - 970
Hlavní autori: Chen, Guang, Ke, Zhihong, Ren, Chengzu, Li, Jun
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Beijing Chinese Mechanical Engineering Society 01.09.2016
Springer Nature B.V
Key Laboratory of Equipment Design and Manufacturing Technology, Tianjin University, Tianjin 300072, China
Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300072, China%Key Laboratory of Equipment Design and Manufacturing Technology, Tianjin University, Tianjin 300072, China
Vydanie:English ed.
Predmet:
Advanced Manufacturing and Machining Technology
Compression tests
Computer simulation
Constitutive models
Cracks
Cutting parameters
Deformation
Edge dislocations
Electrical Machines and Networks
Electronics and Microelectronics
Engineering
Engineering Thermodynamics
Finite element method
Flow simulation
Flux density
Genetic algorithms
Heat and Mass Transfer
High strain rate
Instrumentation
Machines
Machining
Manufacturing
Mathematical models
Mechanical Engineering
Metal cutting
Model accuracy
Morphology
Power Electronics
Processes
Shear bands
Simulation
Theoretical and Applied Mechanics
Titanium base alloys
Yield strength
SHPB test
high strain rate
Ti-6Al-4V alloy
machining
constitutive model
ISSN:1000-9345, 2192-8258
On-line prístup:Získať plný text
Tagy: Pridať tag
Žiadne tagy, Buďte prvý, kto otaguje tento záznam!
Popis
Shrnutí:A constitutive model is critical for the prediction accuracy of a metal cutting simulation. The highest strain rate involved in the cutting process can be in the range of 104-106 s 1. Flow stresses at high strain rates are close to that of cutting are difficult to test via experiments. Split Hopkinson compression bar （SHPB） technology is used to study the deformation behavior of Ti-6Al-4V alloy at strain rates of 10 -4-10 4s- 1. The Johnson Cook （JC） model was applied to characterize the flow stresses of the SHPB tests at various conditions. The parameters of the JC model are optimized by using a genetic algorithm technology. The JC plastic model and the energy density-based ductile failure criteria are adopted in the proposed SHPB finite element simulation model. The simulated flow stresses and the failure characteristics, such as the cracks along the adiabatic shear bands agree well with the experimental results. Afterwards, the SHPB simulation is used to simulate higher strain rate（approximately 3 × 10 4 s -1） conditions by minimizing the size of the specimen. The JC model parameters covering higher strain rate conditions which are close to the deformation condition in cutting were calculated based on the flow stresses obtained by using the SHPB tests （10 -4 - 10 4 s- 1） and simulation （up to 3 × 10 4 s - 1）. The cutting simulation using the constitutive parameters is validated by the measured forces and chip morphology. The constitutive model and parameters for high strain rate conditions that are identical to those of cutting were obtained based on the SHPB tests and simulation.
Bibliografia:constitutive model, Ti-6Al-4V alloy, SHPB test, high strain rate, machining
11-2737/TH
A constitutive model is critical for the prediction accuracy of a metal cutting simulation. The highest strain rate involved in the cutting process can be in the range of 104-106 s 1. Flow stresses at high strain rates are close to that of cutting are difficult to test via experiments. Split Hopkinson compression bar （SHPB） technology is used to study the deformation behavior of Ti-6Al-4V alloy at strain rates of 10 -4-10 4s- 1. The Johnson Cook （JC） model was applied to characterize the flow stresses of the SHPB tests at various conditions. The parameters of the JC model are optimized by using a genetic algorithm technology. The JC plastic model and the energy density-based ductile failure criteria are adopted in the proposed SHPB finite element simulation model. The simulated flow stresses and the failure characteristics, such as the cracks along the adiabatic shear bands agree well with the experimental results. Afterwards, the SHPB simulation is used to simulate higher strain rate（approximately 3 × 10 4 s -1） conditions by minimizing the size of the specimen. The JC model parameters covering higher strain rate conditions which are close to the deformation condition in cutting were calculated based on the flow stresses obtained by using the SHPB tests （10 -4 - 10 4 s- 1） and simulation （up to 3 × 10 4 s - 1）. The cutting simulation using the constitutive parameters is validated by the measured forces and chip morphology. The constitutive model and parameters for high strain rate conditions that are identical to those of cutting were obtained based on the SHPB tests and simulation.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1000-9345
2192-8258
DOI:10.3901/CJME.2016.0406.046