Forming Limits in Sheet Metal Forming for Non-Proportional Loading Conditions — Experimental and Theoretical Approach
Forming Limits in Sheet Metal Forming for Non-Proportional Loading Conditions — Experimental and Theoretical Approach
复制标题
非比例载荷条件下金属板材成形的成形极限 - 实验和理论方法
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Merklein
中科院分区：
文献类型：
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作者：
A. Ofenheimer;B. Buchmayr;R. Kolleck;M. Merklein
应变路径（加载历史）对材料可成形性的影响在板材成形过程中是众所周知的。采用先进的实验方法确定了AA6016‐T4铝合金成形极限应变路径的整体形状。给出了板材在接收状态下以及不同预变形情况下的成形极限。基于Arrieux的内禀成形极限应力曲线（FLSC）概念，采用理论方法数值预测了加载历史对成形程度的影响。详细的实验应变路径，而不是任何线性或双线性简化的加载历史中使用的理论研究，以证明在应力状态下的成形极限的预测质量。
The influence of strain paths (loading history) on material formability is well known in sheet forming processes. Sophisticated experimental methods are used to determine the entire shape of strain paths of forming limits for aluminum AA6016‐T4 alloy. Forming limits for sheet metal in as‐received condition as well as for different pre‐deformation are presented. A theoretical approach based on Arrieux’s intrinsic Forming Limit Stress Curve (FLSC) concept is employed to numerically predict the influence of loading history on forming severity. The detailed experimental strain paths are used in the theoretical study instead of any linear or bilinear simplified loading histories to demonstrate the predictive quality of forming limits in the state of stress.