Constitutive models of plasticity for anisotropic sheet metals for cold/warm forming and their forming simulation applications

冷/温成形各向异性板材塑性本构模型及其成形模拟应用

• 批准号: 15360057
• 负责人: YOSHIDA Fusahito
• 金额: $ 9.66万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360057/
• 关键词: Sheet metal forming; Plasticity; Constitutive model; Yield surface; Steel sheet; Magnesium alloy sheet; Aluminum alloy sheet; アルミニウム

This work deals with the constitutive modeling of plasticity and its application to sheet metal forming simulations. The summary of the research results is as follows :[1] Constitutive modeling(1) A constitutive model of large-strain cyclic plasticity, which properly describes the Bauschinger effect and cyclic hardening characteristics, as well as the anisotropy of sheet metals, Yoshida-Uemori model, has been proposed. This model has been verified by comparing the simulated results with the corresponding experimental results for deformation behavior in cyclic plasticity and bi-axial stretching tests.(2) A model to describe the yield-point phenomena of annealed steels has been proposed.(3) The effects of temperature and strain rates on the visco-plastic behavior of an aluminum alloy (A5083) and a magnesium alloy (AZ31) sheets were experimentally investigated. Based on the experimental observations, constitutive models of visco-plasticity have been presented.[2] Numerical simulations and process design for sheet metal forming(1) The above Yoshida-Uemori model has been implemented to a commercial FE code of PAM-STAMP, and using this, FE simulations of a hat-type draw-bending and S-rail forming were performed. From the results, it was found that the predictions of sheet draw-in and springback by this his model are more accurate than those calculated by a conventional model of the isotropic hardening plasticity.(2) A new algorithm for springback analysis taking account of the elastic deformations of dies has been proposed.(3) A method of springback control by optimum drawbead setting has been presented.(4) A criterion for fracture limits of sheet metals under stretch bending has been proposed.(5) Formability of adhesively-bonded sheet metals has been investigated by performing experiments and numerical simulations.(6) A new technology of incremental sheet-metal forming with local heating has been proposed.

本文研究了塑性本构模型及其在板料成形模拟中的应用。(1)提出了一种能够很好地描述包辛格效应和循环硬化特性以及板料各向异性的大应变循环塑性本构模型，即吉田-上森模型。将模拟结果与相应的循环塑性和双轴拉伸变形试验结果进行对比，验证了该模型的正确性。(2)提出了一个描述退火钢屈服点现象的模型。(3)实验研究了温度和应变速率对铝合金（A5083）和镁合金（AZ31）板材粘塑性行为的影响。在实验观察的基础上，提出了粘塑性的本构模型(1)将上述Yoshida-Uemori模型应用到PAM-STAMP商用有限元程序中，并利用该模型对帽型拉弯成形和s轨成形进行了有限元模拟。结果表明，与传统的各向同性硬化塑性模型相比，该模型对板料拉深和回弹的预测精度更高。(2)提出了一种考虑模具弹性变形的回弹分析新算法。(3)提出了一种通过优化拉延筋设置来控制回弹的方法。(4)提出了板料拉伸弯曲断裂极限判据。(5)通过实验和数值模拟研究了粘接板料的成形性。(6)提出了一种局部加热增量成形新工艺。

项目成果

局所加熱を伴うインクリメンタルフォーミングによる軽量板材成形

通过局部加热增量成形实现轻质板材成形

• 发表时间: 2005
• 期刊: 平成17年度塑性加工春季講演会
• 作者: H.B.Sun;T.Yoshida;H.B.Sun;蔦森秀夫;吉田正敏;瀧口三千弘;日野隆太郎
• 通讯作者: 日野隆太郎

鋼板の調質圧延における不均一塑性変形のFEMシミュレーション

钢板调质轧制过程中非均匀塑性变形的有限元模拟

• 发表时间: 2005
• 期刊: 平成17年度塑性加工春季講演会
• 作者: H.B.Sun;T.Yoshida;H.B.Sun;蔦森秀夫;吉田正敏;瀧口三千弘;日野隆太郎;Ryutaro Hino;S.Abe;吉田総仁;倉光徹;山本茂雄
• 通讯作者: 山本茂雄

ドロービード配置と金型見込み量の最適化によるSレイル成形品のねじれとそりの抑制

通过优化拉延筋布置和估计模具体积来抑制 S 导轨成型产品的扭曲和翘曲

• 发表时间: 2005
• 期刊: 第56回塑性加工連合講演会
• 作者: H.B.Sun;T.Yoshida;H.B.Sun;蔦森秀夫;吉田正敏;瀧口三千弘;日野隆太郎;Ryutaro Hino;S.Abe;吉田総仁;倉光徹;山本茂雄;吉田総仁;中哲夫;佐原隆介;安部重毅
• 通讯作者: 安部重毅

高張力鋼板の繰返し塑性変形挙動とその構成モデル

高强钢板循环塑性变形行为及其本构模型

• 发表时间: 2003
• 期刊: 第54回塑性加工連合講演会
• 作者: 中哲夫;廣中智久;高津正秀;東健司;上森武;吉田総仁;F.Yoshida;上森武
• 通讯作者: 上森武

AZ31板の降伏挙動におよぼす温度とひずみ速度の影響

温度和应变速率对AZ31板屈服行为的影响

• 发表时间: 2004
• 期刊: 塑性加工学会・第55回塑性加工連合講演論文集
• 作者: 堂田邦明;窪田寛之;Akio TAKADA;Akio Takada;高田 晄男;高田 晄男;高田 晄男;高田 晄男;高田 晄男;高田 晄男;Akio TAKADA;畑瀬雄一;福城和也;中哲夫
• 通讯作者: 中哲夫