Design Optimization of Stress Relief Grooves in Lever Guide of Pressure Vessel for Food Processing ()
Yuichi Otsuka,
Hamirdin Bin Baron,
Yoshiharu Mutoh
Department of System Safety, Nagaoka University of Technology, Niigata, Japan.
Top Runner Incubation Center for Academia-Industry Fusion, Nagaoka University of Technology,Niigata, Japan.
Undergraduate School of Mechanical Engineering, Nagaoka University of Technology,Niigata, Japan.
DOI: 10.4236/ojsst.2012.21001
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Abstract
A stress relief groove is introduced in the R area and the stress is analyzed using a finite element method (FEM). Then the relief of the stress concentration in the vicinity of the pressure vessel is measured based on these results. When designing a stress relief groove, the lever must overhang the groove (L > 0). By introducing a stress relief groove to the R area, maximum stress on the lever guide can be reduced by 10%. This enables the reduction of the maximum stress (Mises stress) to be less than the fatigue strength. Furthermore, the location where maximum stress occurs on the lever guide changes in accordance with the clearance between the lever and lever guide. This identified the need to take into account the deviation factor such as design clearance in modeling process.
Share and Cite:
Otsuka, Y. , Baron, H. and Mutoh, Y. (2012) Design Optimization of Stress Relief Grooves in Lever Guide of Pressure Vessel for Food Processing.
Open Journal of Safety Science and Technology,
2, 1-7. doi:
10.4236/ojsst.2012.21001.
Conflicts of Interest
The authors declare no conflicts of interest.
References
|
[1]
|
Y. Kishi, “High Pressure Processing Equipment for Food and Biotechnology Fields,” Kobe Steel Engineering Report, Vol. 158, No. 2, 2008, p. 25.
|
|
[2]
|
Y. Murakami, “Concept of Stress Concentrations,” Yokendo Limited, Tokyo, 2005.
|
|
[3]
|
Y. Kondo, M. Kubota and S. Kataoka, “Effect of Stress Relief Groove Shape on Fretting Fatigue Strength and Index for the Selection of Groove Shape,” Journal of the Society of Materials Science, Vol. 56, No. 12, 2007, pp. 1156-1162. doi:10.2472/jsms.56.1156
|
|
[4]
|
J. Fish and T. Belytschko, “A First Course in Finite Elements,” John Wiley & Sons Limited, West Sussex, 2007.
doi:10.1002/9780470510858
|
|
[5]
|
D. Nie, Y. Otsuka and Y. Mutoh, “Fatigue Behaviors of Smooth and Notched SUS630 Stainless Steel Specimens”, Proceeding of 12th Fractography Symposium, December 2010.
|
|
[6]
|
Y. Otsuka, J. Fujii, M. Takato and Y. Mutoh, “Fail-Safe Design by Outer Cover of High Pressure Vessel for Food Processing,” Open Journal of Safety Science and Technology, Vol. 1, No. 3, 2011, pp. 89-93.
doi:10.4236/ojsst.2011.13009
|