非線性組合硬化條件下鎂合金板料變形回彈預測

趙曉迪; 岳振明; 高軍; 褚興榮

doi:10.13374/j.issn2095-9389.2017.04.010

非線性組合硬化條件下鎂合金板料變形回彈預測

doi: 10.13374/j.issn2095-9389.2017.04.010

山東大學(威海) 機電與信息工程學院, 威海 264209

基金項目:

國家自然科學基金資助項目(51605257)

詳細信息

中圖分類號: TG386
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出版歷程
- 收稿日期: 2016-10-11

Springback prediction of magnesium alloy sheet with nonlinear combined hardening

School of Electrical and Information Engineering, Shandong University at Weihai, Weihai 264209, China

摘要

摘要: 變形回彈作為金屬板料成形的主要缺陷之一,如何提高變應變路徑條件下的回彈預測精度一直是研究者們面臨的難題.本文針對鎂合金變形特點,提出了同時考慮同向硬化、動態硬化和屈服圓畸變的本構模型.以0.8 mm厚AZ31B鎂合金板料為研究對象,施加不同預拉伸后進行彎曲變形試驗,觀察了不同預變形對回彈規律的影響.同時結合有限元分析ABAQUS-Explicit (Vumat)和ABAQUS-Implicit (Umat)對板料的變形及回彈過程進行模擬仿真,對比試驗與模擬結果,驗證動態硬化對于鎂合金板料變形回彈的重要影響.
- 鎂合金 /
- 回彈 /
- 包辛格效應 /
- 動態硬化 /
- 誘發各向異性
Abstract: Springback is regarded as one of the main defects that occur in sheet-metal forming processes. Therefore, improving its prediction accuracy, especially under highly nonlinear conditions, is important for researchers. In this paper, constitutive equations that consider the isotropic hardening, kinematic hardening, and distortional hardening are proposed for magnesium alloy sheet. The work hardening and springback behaviors of 0.8-mm-thick AZ31B magnesium alloy sheet were investigated and simulated. The AZ31B specimen was subjected to a bending process after the pre-tension deformation, which aided in the observation of its springback behavior under nonlinear loading paths. Simulations were conducted using ABAQUS-Explicit (Vumat) and ABAQUS-Implicit (Umat). Comparisons between the experimental and numerical results demonstrate the strong influence of the kinematic hardening on the springback prediction of magnesium alloy sheet.
- magnesium alloy sheet /
- springback /
- Bauschinger effect /
- kinematic hardening /
- induced anisotropy

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參考文獻(20)

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