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Abstract：
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Simulation technique for deformation theory research of enlarging large tubular forgings was investigated.Referring to an actual enlarging process in manufacturing RPV,through a group of reduced-size specimens,slowly compressed them by a 30 t versatile material tester in laboratory at normal temperature.The equivalent-strain EI isographs was got quantitatively for the process,the typical strain area distribution feature in a enlarging process was deduced,and an effect of tubular shape-factor,anvil width,reducing rate were revealed.For the first time,the most optimized tubular shape-factor of 0.95 was deduced at a point of strain field.The result provides an important reference for a possible application in actual RPV manufacture.
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Reference：
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