Accurate material models and prediction of forming limits on high performance difficult-to-form sheet metals for cold and hot forming CAE

用于冷热成型 CAE 的高性能难成型板材的准确材料模型和成型极限预测

• 批准号: 20360070
• 负责人: YOSHIDA Fusahito
• 金额: $ 12.56万
• 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: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20360070/
• 关键词: 成形加工; 高機能難加工板材; 弾塑性構成モデル; 成形限界; 熱間加工; CAE; 冷・熱間加工

Elasto-viscoplastic material behaviors of several types of sheet metals, such as high strength steel, stainless steel, aluminum, magnesium and titanium sheets, at various temperatures were experimentally investigated. Based on the experimental observations, macro constitutive models for these metals were proposed and they have been installed into CAE code LS-DYNA. Meso-plasticity models based on the crystal plasticity theory were also proposed to discuss the effect of the texture on the anisotropy of sheet metals. Furthermore, forming limits under stretch forming, stretch bending and hole expansion were investigated, and new criteria of forming limits were newly proposed. The validity of the proposed material models and the forming limit criteria have been verified by performing sheet metal forming simulations.

在各种温度下，在各种温度下，在各种温度下研究了几种类型的薄板金属的Elasto-Viscoplastic材料行为。基于实验观测，提出了这些金属的宏观组成模型，并已将其安装到CAE代码LS-DYNA中。还提出了基于晶体可塑性理论的中塑性模型，以讨论质地对薄板金属各向异性的影响。此外，还研究了在拉伸形成，拉伸弯曲和孔扩展下形成极限，并新提出了形成极限的新标准。通过执行金属形成模拟，已经验证了提出的材料模型和形成极限标准的有效性。

项目成果

Material models for accurate simulation of sheet metal forming and springback.

用于精确模拟钣金成型和回弹的材料模型。

• 发表时间: 2010
• 作者: R. Hino;H. Fujii;A. Hirahara;F. Yoshida;日野隆太郎;上森武;上森武;服部康弘;小川孝行;Fusahito Yoshida;吉田総仁;吉田総仁;濱崎洋;日野隆太郎;小林匠;北山功志郎;細谷拓;S.Tamura;T.Uemori;K.Kitayama;Fusahito Yoshida;Fusahito Yoshida;F.Yoshida
• 通讯作者: F.Yoshida

オーステナイト系ステンレス鋼の繰返し変形挙動と応力誘起マルテンサイト変態の影響

奥氏体不锈钢的循环变形行为及应力诱导马氏体相变的影响

• 发表时间: 2009
• 作者: 日野隆太郎;Yilamu Kelimu;濱崎洋;吉田総仁;Fusahito Yoshida;Fusahito Yoshida;吉田総仁;北山功志郎;小川耕平
• 通讯作者: 小川耕平

Reduction of springback by bottoming and ironing on high strength steel sheet.

通过对高强度钢板进行打底和熨烫来减少回弹。

• 发表时间: 2010
• 期刊: Steel Research International
• 影响因子: 2.2
• 作者: T.Ogawa;A.Hirahara;F.Yoshida
• 通讯作者: F.Yoshida

A model of large-strain plasticity and its numerical applications to springback prediction

大应变塑性模型及其在回弹预测中的数值应用

• 发表时间: 2009
• 作者: 日野隆太郎;Yilamu Kelimu;濱崎洋;吉田総仁;Fusahito Yoshida
• 通讯作者: Fusahito Yoshida

Description of planar anisotropyand cyclic plasticity behavior of aluminumsheet based on crystal plasticity

基于晶体塑性的铝板平面各向异性和循环塑性行为描述

• 发表时间: 2011
• 期刊: Applied Mechanics and Materials
• 作者: T. Kobayashi;K. Kitayama;T. Uemori;F. Yoshida
• 通讯作者: F. Yoshida