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車(chē)用鋁合金板材回彈規(guī)律研究
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武漢理工大學(xué) 現(xiàn)代汽車(chē)零部件技術(shù)湖北省重點(diǎn)實(shí)驗(yàn)室

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中圖分類(lèi)號(hào):

TG146.2

基金項(xiàng)目:

國(guó)家自然科學(xué)基金（Grant No.51775397，51405358）；“111”計(jì)劃（B17034）；中國(guó)汽車(chē)產(chǎn)業(yè)創(chuàng)新發(fā)展聯(lián)合基金（U1564202）；教育部創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃（IRT13087）


Experimental and numerical investigation on springback of automotive aluminum alloy sheet
Author:
Affiliation:

Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology

Fund Project:

the National Natural Science Foundation of China (Grant No. 51775397，51405358), the 111 Project (B17034), the National Natural Science Foundation of China (U1564202) and the Innovative Research Team Development Program of Ministry of Education of China (IRT13087)

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    摘要:

    在車(chē)用鋁合金材料的成形加工過(guò)程中,回彈是主要的成形缺陷之一并且較難控制。本文對(duì)車(chē)用6061鋁合金板材進(jìn)行了室溫拉伸試驗(yàn)獲得其應(yīng)力-應(yīng)變曲線(xiàn)并建立改進(jìn)的Johnson-Cook本構(gòu)模型。該模型被應(yīng)用于V形彎曲試驗(yàn)的有限元仿真中,研究不同各向異性屈服準(zhǔn)則對(duì)板料回彈預(yù)測(cè)精度的影響,仿真結(jié)果表明應(yīng)用YLD2000-2d屈服準(zhǔn)則時(shí)其預(yù)測(cè)精度較高,同時(shí)也驗(yàn)證了該模型用于回彈分析的有效性。進(jìn)一步探究不同因素如變形程度,沖壓速度,摩擦條件,壓邊力等對(duì)鋁合金板材回彈行為的影響規(guī)律,并應(yīng)用于鋁合金發(fā)罩內(nèi)板的沖壓成形過(guò)程,能夠有效減小工件的回彈。

    Abstract:

    In the forming process of automotive aluminum alloy, springback is one of the main defects and difficult to be controlled. In this study, stress-strain curves of automotive aluminum alloy 6061 are obtained through tensile tests at room temperature and the constitutive model is established based on a modified Johnson-Cook equation. The model is used in finite element simulation of V-bending tests to investigate the effect of different anisotropic yield criterions on accuracy of springback prediction. Experimental and simulation results indicate that the prediction results are more accurate when YLD2000-2d yield criterion is applied and the efficacy of the model in sprignback analysis is verified. Furthermore, the effect of several different factors on springback behavior of aluminum alloy sheet was investigated, including deformation degree, drawing velocity, friction condition and blank holding force. The experimental and numerical investigation is applied in stamping forming process of aluminum alloy inner panel of engine cover and the springback is reduced effectively.

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引用本文

張文沛,胡志力,李歡歡,華林.車(chē)用鋁合金板材回彈規(guī)律研究[J].稀有金屬材料與工程,2019,48(7):2130~2137.[Zhang Wenpei, Hu Zhili, Li Huanhuan, Hua Lin. Experimental and numerical investigation on springback of automotive aluminum alloy sheet[J]. Rare Metal Materials and Engineering,2019,48(7):2130~2137.]
DOI：10.12442/j. issn.1002-185X.20180130

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  • 收稿日期:2018-02-02
  • 最后修改日期:2018-04-10
  • 錄用日期:2018-04-26
  • 在線(xiàn)發(fā)布日期: 2019-08-01
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