因此，成形极限应力图作为复杂加载路径的成形极限判据更加方便和实用。
So it "s more convenient and practical to use FLSD as the criterion of forming limit."
综述了国内外成形极限应力图的研究进展，并指出了目前成形极限应力图研究所面临的主要问题。
The research progresses on FLSD were summarized, and the existing problems of FLSD were also pointed out.
而以极限应力构成的成形极限应力图FLSD由于不依赖加载应变路径，已成为目前研究的热点。
While FLSD, which is stress-based and independent of strain path, has become the hotspot in this field.
结果表明，成形极限应力图不受应变路径影响，对于同一失稳准则，在不同加载应变路径下几乎为同一条曲线。
The result shows that FLSD is independent of strain path, and that the FLSD under different strain paths are almost the same curve according to the same instability theory.
结果表明，成形极限应力图不受应变路径影响，对于同一失稳准则，在不同加载应变路径下几乎为同一条曲线。
The result shows that FLSD is independent of strain path, and that the FLSD under different strain paths are almost the same curve according to the same instability theory.
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