INVESTIGATION OF HYDRO-PIERCING METHOD FOR STAINLESS STEELS BY FINITE ELEMENT METHOD

Abstract

In this study, numerical evaluation of the adaptability of the cutting operation to the hydroforming process, which has been widely used in many areas especially in recent years, has been made. In the numerical studies, the cut surfaces of the material were evaluated and the burr formation state was investigated for the different movement of the punch. Within the scope of the modeling study, it was tried to determine whether the cutting condition in the target process parameters was realized by using the Johnson-Cook (J-C) hardening and damage model. As a result, 304 stainless steel can be cut by this process in target process parameters.

Keywords

• Hydro-piercing,Johnson-Cook damage criteria,304 stainless steel

PASLANMAZ ÇELİKLERDE HİDRO-KESME YÖNTEMİNİN SONLU ELEMANLAR YÖNTEMİ İLE İNCELENMESİ

Öz

Yapılan bu çalışmada kesme operasyonunun özellikle son yıllarda birçok alanda yaygın olarak kullanılmaya başlanan hidro şekillendirme prosesine uyarlanabilirliğinin nümerik olarak değerlendirilmesi yapılmıştır. Nümerik çalışmalar kapsamında malzemenin kesilme yüzeyleri değerlendirilmiş ve çapak oluşum durumu zımbanın farklı hareketi için incelenmiştir. Modelleme çalışması kapsamında Johnson-Cook (J-C) pekleşme ve hasar modeli kullanılarak, hedeflenen proses parametrelerinde kesme durumunun gerçekleşip gerçekleşmediği belirlenmeye çalışılmıştır. Sonuç olarak hedef proses parametrelerinde 304 paslanmaz çeliğin bu proses ile kesilebilirliği gösterilmiştir.

Anahtar Kelimeler

• Hidro-kesme,Johnson-Cook hasar kriteri,304 paslanmaz çeliği

References

1. [1] KOCANDA A. and SADLOWSKA H., "Automotive Component Development by Means of Hydroforming: A Review". Archives of Civil and Mechanical Engineering, 2008.8, 3, 55-72.
2. [2] ŞAHIN S., "Hidrolik Şekillendirme Yönteminin Esasları Ve Sınıflandırılması". Mühendis ve Makina, 2004.45-553, 35-39.
3. [3] LANG L.H., WANG Z.R., KANG D.C., YUAN S.J., ZHANG S.H., DANCKERT J., and NIELSEN K.B., "Hydroforming Highlights: Sheet Hydroforming and Tube Hydroforming". Journal of Materials Processing Technology, 2004.151, 1-3, 165-177.
4. [4] WANG Y., LANG L., SHERKATGHANAD E., NIELSEN K.B., LI X.X., and SUN Z.Y., "Rigid-Flexible Coupling Forming Process for Aluminum Alloy Automobile Body Panels". The International Journal of Advanced Manufacturing Technology, 2018.
5. [5] WANG Z.J., ZHENG L.H., LIU Z.G., XIANG N., and WANG P.Y., "Investigation of Viscous Pressure Forming for 6k21-T4 Aluminum Alloy Car Panels". International Journal of Advanced Manufacturing Technology, 2016.85, 9-12, 2525-2534.
6. [6] LANG L.H., DANCKERT J., and NIELSEN K.B., "Multi-Layer Sheet Hydroforming: Experimental and Numerical Investigation into the Very Thin Layer in the Middle". Journal of Materials Processing Technology, 2005.170, 3, 524-535.
7. [7] NGAILE G. and LOWRIE J., "Punch Design for Floating Based Micro-Tube Hydroforming Die Assembly". Journal of Materials Processing Technology, 2018.253, 168-177.
8. [8] HASHEMI S.J. and RAHMANI F., "Investigation of the Geometry of Rectangular Cross Section Aluminum Parts in Low Pressure Tube Hydroforming Process". The Indian Institute of Metals, 2018.

9. [9] HUANG T.L., SONG X.W., and LIU M., "The Multi-Objective Non-Probabilistic Interval Optimization of the Loading Paths for T-Shape Tube Hydroforming". International Journal of Advanced Manufacturing Technology, 2018.94, 1-4, 677-686.
10. [10] KIM S.S., HAN C.S., and LEE Y.S., "Development of a New Burr-Free Hydro-Mechanical Punching". Journal of Materials Processing Technology, 2005.162, 524-529.
11. [11] COCKROFT M.G. and LATHAM D.J., "A Simple Criterion of Fracture for Ductile Metals". National Engineering Laboratory, 1966.Report No:240,
12. [12] HASSANNEJADASL A., GREEN D.E., ALTENHOF W.J., MARIS C., and MASON M., "Numerical Modeling of Multi-Stage Tube Hydropiercing". Materials & Design, 2013.46, 235-246.
13. [13] MAJZOOBI G.H. and DEHGOLAN F.R., "Determination of the Constants of Damage Models". 11th International Conference on the Mechanical Behavior of Materials (Icm11), 2011.10,
14. [14] FEUCHT M., SUN D.-Z., ENHART T., and FRANK T., "Recent Development and Applications of the Gurson Model". LS-DYNA Anwenderforum, 2006.D II, 21-32.
15. [15] WU Z.G., LI S.H., ZHANG W.G., and WANG W.R., "Ductile Fracture Simulation of Hydropiercing Process Based on Various Criteria in 3d Modeling". Materials & Design, 2010.31, 8, 3661-3671.
16. [16] G. C.M. and J. L.D., "Ductility and the Workability of Metals". Journal of the Institute of Metals, 1968.96, 33-39.
17. [17] CLIFT S.E., HARTLEY P., STURGESS C.E.N., and ROWE G.W., "Fracture Prediction in Plastic-Deformation Processes". International Journal of Mechanical Sciences, 1990.32, 1, 1-17.
18. [18] P H., I P., and C. S., "Numerical Modelling of Material Deformation Processes Research, Development and Applications". 1992, Berlin: Springer.
19. [19] HAMBLI R. and RESZKA M., "Fracture Criteria Identification Using an Inverse Technique Method and Blanking Experiment". International Journal of Mechanical Sciences, 2002.44, 7, 1349-1361.
20. [20] J.R. R. and D.M. T., "On the Ductile Enlargement of Voids in Triaxial Stress Fields". Journal of the Mechanics and Physics of Solids, 1969.17, 3, 201-217.
21. [21] SHIOMI M., UEDA Y., and OSAKADA K., "Piercing of Steel Sheet by Using Hydrostatic Pressure". Cirp Annals-Manufacturing Technology, 2006.55, 1, 255-258.