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鈦合金筒形件真空熱脹形壁厚效應(yīng)的數(shù)值模擬
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TG146.23

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Numerical Simulation of Wall Thickness Effects in Vacuum Hot Bulge Forming Process of Titanium Alloy Cylindrical Workpiece
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    摘要:

    建立了鈦合金筒形件真空熱脹形的二維非線性熱力耦合有限元模型。使用有限元軟件MSC-Marc對(duì)鈦合金簡(jiǎn)形件真空熱脹形過(guò)程進(jìn)行數(shù)值模擬。計(jì)算了鈦合金筒形件真空熱脹形過(guò)程的溫度場(chǎng)和變形場(chǎng)，并進(jìn)行了相應(yīng)的實(shí)驗(yàn)驗(yàn)證。模擬結(jié)果與實(shí)驗(yàn)結(jié)果吻合較好。用建立的模型對(duì)真空熱脹形過(guò)程中鈦合金筒形件壁厚效應(yīng)進(jìn)行數(shù)值模擬，討論了一定工藝條件下鈦合金筒形件壁厚與彎曲角度、脹形量和殘余應(yīng)力之間的關(guān)系，為實(shí)際生產(chǎn)中制定和優(yōu)化鈦合金筒形件真空熱脹形工藝參數(shù)提供理論與實(shí)踐依據(jù)。

    Abstract:

    A 2-D nonlinear thermo-mechanical coupled finite element model was developed. Numerical simulation of vacuum hot bulge forming process of titanium alloy cylindrical workpiece was carried out using the FE software MSC.Mrac. The temperature field and displacement field of vacuum hot bulge forming process of titanium alloy cylindrical workpiece were calculated using the model. The corresponding experiments were carried out. The simulated results are in good agreement with the experimental results, The wall thickness effects of the cylindrical workpiece were simulated numerically using the developed model. The relationships between bending angle of cylindrical workpiece and wall thickness, between maximum bulge height and wall thickness and between residual stress and wall thickness were discussed under certain technical conditions during the vacuum hot bulge forming process. The results will lay a theoretic foundation for optimizing technical parameters of vacuum hot bulge forming of titanium alloy in future manufacturing process.

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王明偉 張立文 張凡云 李辰輝.鈦合金筒形件真空熱脹形壁厚效應(yīng)的數(shù)值模擬[J].稀有金屬材料與工程,2007,36(10):1772~1775.[Wang Mingwei, Zhang Liwen, Zhang Fanyun, Li Chenhui. Numerical Simulation of Wall Thickness Effects in Vacuum Hot Bulge Forming Process of Titanium Alloy Cylindrical Workpiece[J]. Rare Metal Materials and Engineering,2007,36(10):1772~1775.]
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  • 最后修改日期:2006-09-17
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