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Keywords: structural weld simulation, process chain, work-hardening, high-strength steel, residual stresses, fatigue.

Summary

This paper shows a novel method to incorporate the transient work-hardening effect of different material phases into a thermo-mechanically coupled structural weld process simulation. The work-hardening behaviour of metals differs for "soft" ferritic-perlitc and "hard" bainitic, or even martensitic, phases. Previously conducted experimental work revealed that a soft material phase or rather a high operating temperature are mainly related to isotropic work-hardening, though the hard phased microstructure and accordingly ambient operating temperature are closer equated to a combined work-hardening. An enhanced methodology to implement the temperature- and phase-dependent work-hardening into structural weld process simulation is given. A longitudinal stiffener is chosen as a three-dimensional application example. The change in transient work-hardening is evaluated both for common construction steel S355J2G3 and high-strength steel S700MC. The simulated residual stress state after welding, unclamping and final cool-down is characteristically affected by the material dependent transient work-hardening behaviour. Finally, the effect of cyclic loading is depicted for selected loads in the finite-life fatigue region of the longitudinal stiffener specimen.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 105 PROCEEDINGS OF THE NINTH INTERNATIONAL CONFERENCE ON ENGINEERING COMPUTATIONAL TECHNOLOGY Edited by: P. Iványi and B.H.V. Topping Paper 39 Integration of Phase-Dependent Work-Hardening into Transient Weld Simulation M. Stoschka, M.J. Ottersböck and M. Leitner Department Product Engineering, Chair of Mechanical Engineering Montanuniversität Leoben, Austria doi:10.4203/ccp.105.39 purchase the full-text of this paper Full Bibliographic Reference for this paper M. Stoschka, M.J. Ottersböck, M. Leitner, "Integration of Phase-Dependent Work-Hardening into Transient Weld Simulation", in P. Iványi, B.H.V. Topping, (Editors), "Proceedings of the Ninth International Conference on Engineering Computational Technology", Civil-Comp Press, Stirlingshire, UK, Paper 39, 2014. doi:10.4203/ccp.105.39 Keywords: structural weld simulation, process chain, work-hardening, high-strength steel, residual stresses, fatigue. Summary This paper shows a novel method to incorporate the transient work-hardening effect of different material phases into a thermo-mechanically coupled structural weld process simulation. The work-hardening behaviour of metals differs for "soft" ferritic-perlitc and "hard" bainitic, or even martensitic, phases. Previously conducted experimental work revealed that a soft material phase or rather a high operating temperature are mainly related to isotropic work-hardening, though the hard phased microstructure and accordingly ambient operating temperature are closer equated to a combined work-hardening. An enhanced methodology to implement the temperature- and phase-dependent work-hardening into structural weld process simulation is given. A longitudinal stiffener is chosen as a three-dimensional application example. The change in transient work-hardening is evaluated both for common construction steel S355J2G3 and high-strength steel S700MC. The simulated residual stress state after welding, unclamping and final cool-down is characteristically affected by the material dependent transient work-hardening behaviour. Finally, the effect of cyclic loading is depicted for selected loads in the finite-life fatigue region of the longitudinal stiffener specimen. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £45 +P&P)
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