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Abstract：
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FE simulation using ABAQUS/Explicit was used to investigate the upper and lower limits of counter pressure in the hydromechanical deep drawing(HDD) with different sizes of stepped re\|entrant punch. At the same time, great attention are devoted to give the working zone of counter\|pressure as well as its variation characteristics Based on this, the rapture models for this forming process and the optimal loading paths are also discussed in this paper.
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Funds：
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留学回国人员基金;;
航空科学基金 (0 0H530 72 ) ;;
国家 863计划资助项目 (2 0 0 2AA4640 60 )
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AuthorIntro：
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Reference：
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7 SYossifonandJTiroshOnthepermissiblefluid pressurepathinhydroform ingdeepdrawingprocesses analysisoffailuresandexperimentsJournalofEngineeringforIndustry,1988,110:146～152
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