Effect of Shell Dimensions on Buckling Behavior and Entropy Generation of Thin Welded Shells
Among all mechanical joining processes, welding has
been employed for its advantage in design flexibility, cost saving,
reduced overall weight and enhanced structural performance.
However, for structures made of relatively thin components, welding
can introduce significant buckling distortion which causes loss of
dimensional control, structural integrity and increased fabrication
costs. Different parameters can affect buckling behavior of welded
thin structures such as, heat input, welding sequence, dimension of
structure. In this work, a 3-D thermo elastic-viscoplastic finite
element analysis technique is applied to evaluate the effect of shell
dimensions on buckling behavior and entropy generation of welded
thin shells. Also, in the present work, the approximated longitudinal
transient stresses which produced in each time step, is applied to the
3D-eigenvalue analysis to ratify predicted buckling time and
corresponding eigenmode. Besides, the possibility of buckling
prediction by entropy generation at each time is investigated and it is
found that one can predict time of buckling with drawing entropy
generation versus out of plane deformation. The results of finite
element analysis show that the length, span and thickness of welded
thin shells affect the number of local buckling, mode shape of global
buckling and post-buckling behavior of welded thin shells.
[1] Masubuchi K., Analysis of welded structures. Pergamon Press, Oxford,
1980
[2] Murakawa H., Ueda Y., Zhong X. M., "Buckling behavior of plates
under idealized inherent strain," Transactions of JWRI, Vol.24,
No.2,1995, pp.87-91.
[3] Michaleris P., Debiccari A., "Prediction of welding distortion," Welding
Journal, Vol. 76, No. 4, 1997, pp. 172-180.
[4] Tsai C.L., Park S.C., Cheng W.T., "Welding distortion of a thin-plate
panel structure," A.W.S., Welding Journal, Research Supplement, Vol.
78, 1999, pp. 156s-165s.
[5] Dean D., Hidekazu M., "FEM prediction of buckling distortion induced
by welding in thin plate panel structures," Computational materials
Science,Vol. 43, 2008, pp. 591-607.
[6] Michaleris P., Debiccari A., " A predictive technique for buckling
analysis of thin section panels due to welding," Journal of Ship
Production, Vol.12, No. 4, 1996, pp. 269-275.
[7] Michaleris P., Deo M.V., Sun J., "Prediction of buckling distortion of
welded structures," Science and Technology of Welding & Joining, Vol.
8, No.1, 2003, pp. 55-61.
[8] Schenk T., Richardson I. M., Kraska M., Ohnimus S., "Modeling
buckling distortion of DP600 overlap joints due to gas metal arc welding
and the influence of the mesh density," www.sciendirect.com, Available
online 30 May 2009
[9] Oddy A.S., Goldak J.A., McDill J.M.J., "Numerical analysis of
transformation plasticity in 3D finite element analysis of welds,"
European Journal of Mechanics,A/Solids, Vol. 9, No. 3, 1990, pp. 253-
263.
[10] Watt D.F., Coon L., Bibby M., Henwood C., "An algorithm for
modeling microstructural development in weld heat affected zones (part
a) reaction kinetics," Acta metal., Vol. 36, No.11, 1988, pp.3029-3035.
[11] Ziaee S., Kadivar M.H., Jafarpur K., "Experimental Evaluation of the
Effect of External Restraint on Buckling behavior of Thin Welded
Shells," IJST, Transaction B, Eng., Vol. 33,No.B5, 2009, pp.397-413.
[12] Fallahi A., Jafarpur Kh., and Nami M. R. "An investigation on thermal
behavior of welded plates under the influences of essential thermal
welding parameters," M.S. Thesis, Mechanical Eng., Shiraz, Iran, 2009.
[13] Ronda J., Oliver G.J., "Comparison of applicability of various thermoviscoplastic
constitutive models in modeling of welding," Comput.
Methods Appl. Mech. Engrg., Vol. 153, 1998, pp.195-221.
[14] Brown S. B., Kim K. H., Anand L., "An Internal variable constitutive
model for hot working of metals," International Journal of Plasticity,
Vol. 5, 1989, pp. 95-130.
[1] Masubuchi K., Analysis of welded structures. Pergamon Press, Oxford,
1980
[2] Murakawa H., Ueda Y., Zhong X. M., "Buckling behavior of plates
under idealized inherent strain," Transactions of JWRI, Vol.24,
No.2,1995, pp.87-91.
[3] Michaleris P., Debiccari A., "Prediction of welding distortion," Welding
Journal, Vol. 76, No. 4, 1997, pp. 172-180.
[4] Tsai C.L., Park S.C., Cheng W.T., "Welding distortion of a thin-plate
panel structure," A.W.S., Welding Journal, Research Supplement, Vol.
78, 1999, pp. 156s-165s.
[5] Dean D., Hidekazu M., "FEM prediction of buckling distortion induced
by welding in thin plate panel structures," Computational materials
Science,Vol. 43, 2008, pp. 591-607.
[6] Michaleris P., Debiccari A., " A predictive technique for buckling
analysis of thin section panels due to welding," Journal of Ship
Production, Vol.12, No. 4, 1996, pp. 269-275.
[7] Michaleris P., Deo M.V., Sun J., "Prediction of buckling distortion of
welded structures," Science and Technology of Welding & Joining, Vol.
8, No.1, 2003, pp. 55-61.
[8] Schenk T., Richardson I. M., Kraska M., Ohnimus S., "Modeling
buckling distortion of DP600 overlap joints due to gas metal arc welding
and the influence of the mesh density," www.sciendirect.com, Available
online 30 May 2009
[9] Oddy A.S., Goldak J.A., McDill J.M.J., "Numerical analysis of
transformation plasticity in 3D finite element analysis of welds,"
European Journal of Mechanics,A/Solids, Vol. 9, No. 3, 1990, pp. 253-
263.
[10] Watt D.F., Coon L., Bibby M., Henwood C., "An algorithm for
modeling microstructural development in weld heat affected zones (part
a) reaction kinetics," Acta metal., Vol. 36, No.11, 1988, pp.3029-3035.
[11] Ziaee S., Kadivar M.H., Jafarpur K., "Experimental Evaluation of the
Effect of External Restraint on Buckling behavior of Thin Welded
Shells," IJST, Transaction B, Eng., Vol. 33,No.B5, 2009, pp.397-413.
[12] Fallahi A., Jafarpur Kh., and Nami M. R. "An investigation on thermal
behavior of welded plates under the influences of essential thermal
welding parameters," M.S. Thesis, Mechanical Eng., Shiraz, Iran, 2009.
[13] Ronda J., Oliver G.J., "Comparison of applicability of various thermoviscoplastic
constitutive models in modeling of welding," Comput.
Methods Appl. Mech. Engrg., Vol. 153, 1998, pp.195-221.
[14] Brown S. B., Kim K. H., Anand L., "An Internal variable constitutive
model for hot working of metals," International Journal of Plasticity,
Vol. 5, 1989, pp. 95-130.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:59519", author = "Sima Ziaee and Khosro Jafarpur", title = "Effect of Shell Dimensions on Buckling Behavior and Entropy Generation of Thin Welded Shells", abstract = "Among all mechanical joining processes, welding has
been employed for its advantage in design flexibility, cost saving,
reduced overall weight and enhanced structural performance.
However, for structures made of relatively thin components, welding
can introduce significant buckling distortion which causes loss of
dimensional control, structural integrity and increased fabrication
costs. Different parameters can affect buckling behavior of welded
thin structures such as, heat input, welding sequence, dimension of
structure. In this work, a 3-D thermo elastic-viscoplastic finite
element analysis technique is applied to evaluate the effect of shell
dimensions on buckling behavior and entropy generation of welded
thin shells. Also, in the present work, the approximated longitudinal
transient stresses which produced in each time step, is applied to the
3D-eigenvalue analysis to ratify predicted buckling time and
corresponding eigenmode. Besides, the possibility of buckling
prediction by entropy generation at each time is investigated and it is
found that one can predict time of buckling with drawing entropy
generation versus out of plane deformation. The results of finite
element analysis show that the length, span and thickness of welded
thin shells affect the number of local buckling, mode shape of global
buckling and post-buckling behavior of welded thin shells.", keywords = "Buckling behavior, Elastic viscoplastic model,
Entropy generation, Finite element method, Shell dimensions.", volume = "5", number = "1", pages = "199-8", }