Formability of Sheet Metal Laminates Consisting of Layrs of Less Formbility or Weak Laminate Boundaries

由成型性较差或层压板边界较弱的层组成的金属板层压板的成型性

• 批准号: 07650104
• 负责人: YOSHIDA Fusahito
• 金额: $ 1.47万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650104/
• 关键词: Sheet metal laminats; Metal layr of less ductility; Plastic forming; Forming limit; Delamination; Elasto-plastic analysis; 難加工材; 弱接合界面; 成形性; ステンレスクラッドアルミニウム板; クロムクラッド鋼板; クロムクラッドアルミニウム板

This research project deals with the formability of sheet metal laminates consisting of layrs of less ductility or weak laminate boundaries. The results are summarized as follows.(1) The forming limits under biaxial stress conditionas are determined based on Hill's theory of lacallized necking and the M-K theory. The minimization of reduction of sheet thickness in roll bonding operation is required since the roll-bonding induced prestrain makes the formability considerably less.(2) The fracture load in stretch bending becomes lower with decreasing die-radius. For a two-ply laminate, the fracture load is higher for a weak-layr (outside) /strong-layr (inside) laminate compared with the laminate of reversed configuration.(3) If chromium (whose DBTT is over 150ﾟC) is clad by some appropriate metals, the clad can be plastically bent at comparatively lower temperature. For example, chromium (outside) /aluminium (inside) laminate can be bent at 50ﾟC,because the stress in the chromium layar is reduced due to the movement of the neutral surface.(4) A new testing method of bending of a laminate with a slit is proposed for evaluating the bonding strength of sheet metal laminates.

该研究项目介绍了钣金层压板的形成性，该层层由延展性较小或较弱的层压板边界组成。结果总结如下。（1）双轴应力条件下的形成极限是基于山丘的颈颈理论和M-K理论确定的。需要最小化滚动键合操作中板厚厚度的降低，因为滚动键入诱导的prestrain会仔细地使得弯曲的能力降低。（2）随着降低二刺的降低，拉伸弯曲的断裂负载变得较低。对于两型层压板，与反向构型的层压板相比，对于弱的layr（外部） /强 - layr（内部）层压板的断裂载荷更高。（3）如果铬（其DBTT的DBTT超过150°C）被某些适当的金属夹住，则可以在某些适当的金属上施加较低的温度，在相比的较低温度下，clad可以在较低的温度下弯曲。例如，铬（外部） /铝（内部）层压板可以在50°C下弯曲，因为由于中性表面的运动，铬层中的应力减少了。（4）提议一种新的用缝隙弯曲的测试方法，该方法提议用于评估金属板层板层板岩强度。

项目成果

日野隆太郎,岡田達夫,吉田総仁: "金属積層板の引張曲げ・曲げ戻しにおける変形挙動" 日本機械学会論文集(A編). 62・565. 165-172 (1996)

Ryutaro Hino、Tatsuo Okada、Sohito Yoshida：“金属层压板拉伸弯曲和抗弯时的变形行为”日本机械工程学会会刊（A 版）165-172（1996 年）。

Fusahito YOSHIDA et al.: "Forming limits of sheet metal laminates." J.of JSTP. 37-430. 1125-1130 (1996)

Fusahito YOSHIDA 等人：“金属板层压板的成形极限。”

F.Yoshida and R.Hino: "Forming Limit of Stainless Steel-Clad Aluminium Sheets under Plane Stress Condition" J.Materials Processing Technology. 63. 66-71 (1997)

F.Yoshida和R.Hino：“平面应力条件下不锈钢复合铝板的成形极限”J.材料加工技术。

Fusahito YOSHIDA, Ryutoro HINO, Tatsuo OKADA: "Deformation and Fraeture of Stainless-Steel/Aluminium Sheet Metal Laminates in Stretch-Bending/Unbending" Proceedings of the 5th 1nt. Symp on Plastiaty and its Cwrent Applications. 869-872 (1995)

Fusahito YOSHIDA、Ryutoro HINO、Tatsuo OKADA：“不锈钢/铝板金属层压板在拉伸弯曲/不弯曲中的变形和断裂”第 5 届会议论文集 1nt。

日野隆太郎,吉田総仁: "金属積層板の引張り曲げにおける破断荷重" 日本機械学会論文集 A編. 61. 40-45 (1995)

Ryutaro Hino、Sojin Yoshida：“金属层压板拉伸弯曲的断裂载荷”，日本机械工程师学会汇刊，A 版 61. 40-45 (1995)。