Strain rate analyses during elliptical vibration cutting of Inconel 718 using finite element analysis, Taguchi method, and ANOVA

2020 ◽  
Vol 8 (3) ◽  
pp. 316-330
Author(s):  
Hai-Bo Xie ◽  
Zi-Qing Yang ◽  
Na Qin ◽  
Zhan-Jiang Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Taguchi Method ◽  
Strain Rate ◽  
Inconel 718 ◽  
Element Analysis ◽  
Elliptical Vibration Cutting ◽  
Vibration Cutting ◽  
Elliptical Vibration

A Study on Elliptical Vibration Cutting by Finite Element Analysis

2011 ◽  
Vol 230-232 ◽  
pp. 1029-1033
Author(s):  
Xiao Qin Zhou ◽  
Shao Xin Zhao ◽  
Zhi Wei Zhu ◽  
Jie Qiong Lin ◽  
Dan Luo
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Cutting Forces ◽  
Contact Region ◽  
Equivalent Stress ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Elliptical Vibration Cutting ◽  
Vibration Cutting ◽  
Elliptical Vibration

In order to reveal the mechanistic characteristics during the elliptical vibration cutting (EVC), A simplified 2-D finite element model is developed. The characteristics of the cutting forces during the EVC process are investigated by comparison with the conventional cutting. The results indicate that the lower averaging values of cutting forces can be obtained and an obvious inverse phenomenon of the thrust force is also observed during the EVC process, which may be beneficial to the chip formation. A detailed analysis of the equivalent stress distribution during the EVC process is carried out. A transient stress distribution is observed during the EVC process, the highly localized Von Mises stress in the tool-chip contact region throughout one EVC cycle may help to form a more continuous chip and lead to the ductile regime removal of brittle materials.

Development and Analysis for a New Compliant XY Micropositioning Stage Applied for Nanoindentation Tester System

2019 ◽  
Vol 894 ◽  
pp. 60-71
Author(s):  
Minh Phung Dang ◽  
Thanh Phong Dao ◽  
Hieu Giang Le ◽  
Ngoc Thoai Tran
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Taguchi Method ◽  
Optimization Problems ◽  
High Reliability ◽  
Hybrid Approach ◽  
Element Analysis ◽  
Amplification Ratio ◽  
Design Variables ◽  
The Finite Element Analysis

A Compliant XY micropositioning stage is purported for situating a material sample in nanoindentation tester process. This paper aims to develop, analyze and optimize a XY compliant micropositioning stage. The working stroke of proposed XY stage is amplified by combining the four-lever and a bridge amplification mechanism. To enhance the performances of the stage, the main geometric parameters are optimized by an integration method of Taguchi method, response surface method (RSM) and genetic algorithm (GA). Firstly, static analysis and dynamic analysis are conducted by the finite element analysis in order to predict initial performances of the XY stage. Secondly, the number of experiments and the data are retrieved by combination of the finite element analysis-integrated Taguchi method. Thirdly, the effects of main design variables on the output response sensitivity are considered. Later on, mathematical model for the amplification ratio was established by the RSM. Finally, based on the mathematical equation, the GA is adopted to define the optimal design variables. The results of numerical validations are in a good agreement with the predicted results. The results depicted that the proposed hybrid approach ensures a high reliability for engineering optimization problems.

Effect of temperature and punch speed on forming limit strains of AA5182 alloy in warm forming and improvement in failure prediction in finite element analysis

2017 ◽  
Vol 52 (4) ◽  
pp. 258-273 ◽  
Author(s):  
D Raja Satish ◽  
D Ravi Kumar ◽  
Marion Merklein
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Strain Rate ◽  
Deep Drawing ◽  
Failure Prediction ◽  
Forming Limit ◽  
Element Analysis ◽  
Working Temperature ◽  
Warm Working ◽  
Punch Speed

Formability of AA5182-O aluminum alloy sheets in the warm working temperature range has been studied. Forming limit strains of sheets of two different thicknesses have been determined experimentally in different modes of deformation (biaxial tension, plane strain and tension–compression) by varying temperature and punch speed. A correlation has been established for plane strain intercept of the forming limit diagram (FLD0) with temperature, punch speed and thickness from the experimental results. This correlation has been used to plot the forming limit diagrams for failure prediction in the finite element analysis of warm deep drawing of cylindrical cups. The effect of strain and strain rate on material flow behavior has been incorporated using a strain rate–sensitive power hardening law in which the strain hardening exponent and strain rate sensitivity index have been experimentally determined. The predictions from simulations have been validated by warm deep drawing experiments. Large improvement in accuracy of failure prediction has been observed using the FLDs plotted based on the developed correlation when compared to the existing method of calculating FLD0 using only strain hardening coefficient and thickness. The results clearly indicate the importance of incorporating temperature and punch speed in failure prediction of Al alloys using FLDs in the warm working temperature range.

Sign in / Sign up

Export Citation Format

Share Document