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基于摩擦修正的TC6鈦合金低應(yīng)變速率變形本構(gòu)模型建立
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1.南昌航空大學(xué);2.中航西安飛機(jī)工業(yè)集團(tuán)股份有限公司

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基金項(xiàng)目:

航空科學(xué)基金(2019ZE056009);江西省重點(diǎn)研發(fā)計(jì)劃(20202BBEL53012)


Low strain rate deformation constitutive model of TC6 titanium alloy based on friction correction
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Ives

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    摘要:

    采用Thermecmastor-Z100kn熱模擬試驗(yàn)機(jī)對(duì)TC6鈦合金進(jìn)行了低應(yīng)變速率大變形熱壓縮試驗(yàn),獲得了變形溫度范圍為900~945℃、應(yīng)變速率范圍為0.0001~0.1s-1、變形程度為70%時(shí)的真應(yīng)力-真應(yīng)變曲線(xiàn)。分別使用傳統(tǒng)摩擦修正模型與改進(jìn)摩擦修正模型對(duì)真應(yīng)力-真應(yīng)變曲線(xiàn)進(jìn)行修正,并建立了基于摩擦修正的應(yīng)變補(bǔ)償型Arrhenius模型。結(jié)果表明:改進(jìn)摩擦修正模型能更好地表征材料在大變形狀態(tài)下的真應(yīng)力-真應(yīng)變動(dòng)態(tài)響應(yīng)。經(jīng)摩擦模型修正的應(yīng)變補(bǔ)償型Arrhenius模型相線(xiàn)性相關(guān)度較高,平均絕對(duì)誤差較小,預(yù)測(cè)值精度較高。

    Abstract:

    The thermal compression test of TC6 titanium alloy under low strain rate and large deformation was carried out by Thermecmastor Z100kn thermal simulation machine. The true stress-strain curves were obtained when the deformation temperature was 900 ~ 945℃, the strain rate was 0.0001 ~ 0.1s-1 and the deformation degree was 70%.The traditional friction correction model and the improved friction correction model were used to correct the true stress-strain curve, and the strain-compensated Arrhenius model based on the friction correction was established. The results show that the modified friction correction model can better characterize the true stress-strain dynamic response of materials under large deformation. The strain-compensated Arrhenius model modified by friction model has higher linear correlation, smaller mean absolute error and higher prediction accuracy.

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朱琳,徐勇,陳樂(lè)平,胡生雙,辛周媛.基于摩擦修正的TC6鈦合金低應(yīng)變速率變形本構(gòu)模型建立[J].稀有金屬材料與工程,2023,52(5):1819~1825.[Zhu Lin, Xu Yong, Chen Leping, Hu Shengshuang, Xin Zhouyuan. Low strain rate deformation constitutive model of TC6 titanium alloy based on friction correction[J]. Rare Metal Materials and Engineering,2023,52(5):1819~1825.]
DOI:10.12442/j. issn.1002-185X.20220342

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  • 收稿日期:2022-04-22
  • 最后修改日期:2022-06-14
  • 錄用日期:2022-07-12
  • 在線(xiàn)發(fā)布日期: 2023-06-08
  • 出版日期: 2023-05-29