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。
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.
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。
Some foreign scholars developed the concept of Forming Limit Stress Diagram (FLSD) on the basis of FLD. FLSD is considered as strain path independent.
对计算得到的轮包成形极限图、应力应变分布图进行了分析，并采用基于网格分析法的物理实验验证了有限元建模的可靠性和正确性。
The validity of modeling, the accuracy and reliability of simulation results for stamping forming processes of hubcap are affirmed on the basis of grid strain analysis technique.
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