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- W2034363088 abstract "In complex forging processes, it is essential to find the optimal deformation path and the optimal preform shape that will lead to the desired final shape and service properties. A sensitivity analysis and optimization for preform billet shape in thermo-mechanical coupled simulation is developed in this work. Non-linear sensitivity analysis of temperatures, flow-stresses, strains and strain-rates are presented with respect to design variables. Both analytical and finite-difference gradients are employed to validate the effectiveness of sensitivity analysis developed in this work. Numerous iterations of coupled thermo-mechanical analysis are performed to determine an optimum preform shape based on a given criterion of minimizing the objective function on effective strain variance within the final forging. The design constraints are imposed on die underfill, material scrap, folding defects and temperatures. In addition, a method for material data processing is given in order to determine the flow stress and its derivatives. The shape optimization scheme is demonstrated with the preform designs of an axisymmetric disk and a plane strain problem. Copyright © 1999 John Wiley & Sons, Ltd." @default.
- W2034363088 created "2016-06-24" @default.
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- W2034363088 date "1999-08-10" @default.
- W2034363088 modified "2023-09-23" @default.
- W2034363088 title "Sensitivity analysis and shape optimization for preform design in thermo-mechanical coupled analysis" @default.
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- W2034363088 doi "https://doi.org/10.1002/(sici)1097-0207(19990810)45:10<1349::aid-nme634>3.0.co;2-1" @default.
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