So it "s more convenient and practical to use FLSD as the criterion of forming limit."
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。
It is shown that the change of loading strain path will affect the forming limit curve.
试验结果表明：加载应变路径的变化会影响成形极限曲线的高低。
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。
Forming Limit curves (FLCS) are constructed by two different kinds of shrinking methods in the paper.
用两种不同的双拉成形技术获取成形极限曲线。
The results show that the electromagnetic forming process improves the forming limit of magnesium alloy sheet.
结果表明，电磁成形提高了镁合金成形极限。
The material has better plasticity, higher forming limit and easier to shape in hot stamping than in cold stamping.
与板料冷冲压相比，板料的热冲压成形具有塑性好、成形极限高、易于成形等优点。
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。
The effect of the spline reduced rate and the die sharp to the forming limit is found by analyzing the limit of the extrusion.
通过分析花键冷挤压成形极限，得到花键断面缩减率和凹模形状对花键冷挤压成形时相对挤压应力的影响。
The main function of the system is in-plane bending radius estimation, forming limit estimation and forming process optimization.
本系统的主要功能有：面内弯曲半径的预测；成形极限的预测；成形工艺的优化。
The internal wrinkling and the forming limit are the key problems urgently to be solved for research and development of the process.
内缘失稳起皱及相关的成形极限是这一先进塑性加工过程研究中存在的迫切需要解决的关键问题。
At present, some ductile fracture criteria are applied only to predict the forming limit in stamping forming of simple axisymmetric part.
目前已提出的韧性断裂准则预测板料成形极限，只在简单轴对称件中得到应用。
To accurately predict the forming limit in aluminum alloy sheet forming, ductile fracture criterion is introduced into numerical simulation.
为了准确地预测铝合金板材成形极限，将韧性断裂准则引入到数值模拟中。
Clearance between tube and various dies is of great importance to influence forming limit and quality during thin-walled nc bending process.
管材与不同部位模具间隙是影响薄壁管数控弯曲过程成形极限和成形质量的重要因素。
Electroplastic effect can be employed to increase metal forming limit, reduce deformation resistance and improve surface quality of product.
在金属压力加工中，利用电塑性效应可降低金属变形抗力，增加金属成型极限，改善产品表面质量。
The practice of tube bulge shows that the choice of loading route and forming limit of tube is important to the shape and quality of produce.
胀形生产实践表明，加载路径的选择和管坯的成形极限对管件成形及成形质量有着重要影响。
The mandrel(including flexible balls) is the key to improving the forming limit and forming precision in thin-walled tube NC bending process.
薄壁管数控弯曲中带芯头的柔性芯模是提高薄壁管件成形极限和成形精度的关键因素。
Uniaxial prestrain will obviously improve the forming limit on positive strain ratio zone, while it has little effect on negative strain ratio zone.
单拉预应变路径将显著提高正应变比区的成形极限，而对负应变比区的成形极限影响不大。
Strain-based FLD is strongly affected by the strain path and has brought much inconvenience to the study of forming limit under complex strain paths.
因极限应变构成的FLD受应变路径的影响很大，在研究复杂应变路径的成形极限问题时带来极大不便。
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。
Because of the limitation of material forming limit and other factors, it is necessary to produce this kind of parts by multi-pass spinning technology.
由于受到材料成形极限等因素的限制，成形此类回转体零件往往需要采用多道次旋压工艺。
Sheet hydroforming improves forming limit, therefore, it's fit for manufacturing all Kings shape thinness shell components of light alloys such as aluminum.
板料液力成形由于能提高成形极限，适合于制造铝合金等轻合金各种形状薄壳结构。热态液力成形适合于制造铝、镁等轻合金复杂零件。
The experiment and numerical simulation results have proved this technology can exert forming limit of sheet greatly, it can form deep drawing parts direct…
试验和模拟结果表明，应用固体颗粒介质成形工艺可以极大限度地发挥板料的成形性能，不需要任何辅助工序，可以一次成形深拉深件，且表面质量好，成品率高。
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。
In numerical simulation minimum thickness was taken as forming limit criterion. The research on the relation between minimum thickness and strain paths was carried out.
在数值模拟中应用最小厚度作为成形极限判据，研究最小厚度值与应变路径的关系。
Equiaxial prestrain will obviously decrease the forming limit on positive strain ratio zone, while it slightly improves the forming limit on negative strain ratio zone.
等双拉预应变将明显降低正应变比区的成形极限，对负应变比区的成形极限有所提高。
The forming limitation of two sheets were measured by using Automated Strain Analysis and Measurement Environment (ASAME) and the compact forming limit belts were obtained.
利用自动测试分析系统(ASAME)测量两种薄钢板的成形极限，得到分布较紧密的成形极限带。
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。
This paper predicted the forming limit of sheet metals by using the mechanical property parameters of materials and combining the ductile fracture criteria with finite element simulation.
本文提出利用材料的力学性能参数，采用数值模拟与韧性断裂准则相结合的方法预测板材的成形极限。
Therefore it is necessary to study forming characteristic of conical part, to analyze various parameters'influence on its forming limit, and to define reasonable blank holding force(BHF).
圆锥形零件是曲面类零件中较为典型的零件，对其冲压成形过程的研究是进行曲面类零件研究的基础。
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。
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