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1·The improving processes are proposed based on the Forming Limit Diagram (FLD) analysis.

针对这种情况，从成形极限图（FLD）上讨论了可能的工艺改进方案。

2·In view of this situation, the improving processes are proposed based on the Theoretical Forming Limit Diagram analysis.

针对这种情况，从理论成形极限图上讨论了可能的工艺改进方案。

3·By analyzing the real stress - strain curve with theory of plastic instability and using this testing method, another form of the forming limit diagram has been found.

在利用共稳理论对实际应力应变曲线进行分析的同时，得出了求作板材成形极限图的新方法。

4·Forming limit diagram is used for analyzing sheet forming in finite element analysis software have proposed forming limit stress diagram which is not relies on the loading path.

但它是依赖于加载路径的，用它来分析多道次板成形是不合适的，于是人们提出了与加载路径无关的应力成形极限图。

5·Deformation mode is adjusted according to forming limit diagram (FLD) and maximum springback error, so the optimized one can be found, which in turn optimizes the stretch bending trajectory.

根据成形极限图和规定最大回弹超差量来调整变形模式，找到优化的变形模式和拉弯轨迹。

6·Some foreign scholars developed the concept of Forming Limit Stress Diagram (FLSD) on the basis of FLD. FLSD is considered as strain path independent.

一些国外学者在板料成形极限图的基础上提出了板料应力成形极限图(FLSD)的概念，并认为板料应力成形极限图具有与路径无关的特点。