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汽車覆蓋件破裂試驗(yàn)及基于廣義成形技術(shù)仿
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of Auto Panel Surface Fracture and Simulation Base on Universal Formability Technology
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    摘要:

    針對汽車外覆蓋件的A級表面,，設(shè)計(jì)并制造了4種不同試驗(yàn)?zāi)＞?，在試?yàn)?zāi)＞咧邪嗽谄囃飧采w件容易產(chǎn)生破裂的典型的反拉延特征,。通過沖壓試驗(yàn),，觀察到表面破裂缺陷的產(chǎn)生,，并搜集產(chǎn)生表面破裂缺陷處的應(yīng)變及位移的歷程及在破裂區(qū)域的接觸壓力的數(shù)據(jù)。同時(shí),，以自主開發(fā)的商品化沖壓成形CAE軟件KMAS/UFT模塊為平臺,，針對沖壓過程中破裂缺陷進(jìn)行精確預(yù)示，并以CAE數(shù)值模擬軟件LS-DYNA3D對比,，模擬計(jì)算結(jié)果與沖壓試驗(yàn)結(jié)果基本一致,。依據(jù)廣義成形理論，提出針對破裂控制方案的實(shí)施建議,，為進(jìn)一步修正沖壓模具奠定基礎(chǔ),。

    Abstract:

    In order to emerge the surface fracture of auto body panel, four kinds of experimental dies containing class A surface feature of auto body outer panel was designed. The fracture phenomenon was observed during the stamping experiment. At the same time, numerical simulation based on an independently developed commercial CAE software KMAS/UFT of sheet metal forming was carried out. Comparison between experimental and simulated results based on LS-DYNA3D was made which showed good consistence. And then a universal formability theory called UFT was introduced to optimize the adjustment amount of metal flow and the stamping dies for fracture. Some suggestions were given by investigating the adjustment amount and modification of the stamping die.

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王金武,胡平,付爭春,許言午.汽車覆蓋件破裂試驗(yàn)及基于廣義成形技術(shù)仿[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(11):227-231. of Auto Panel Surface Fracture and Simulation Base on Universal Formability Technology[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(11):227-231.

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