成形极限图

应用成形极限图分析冲压零件成形的安全裕度和进行选材预测时，对以平面应变和胀形为主的成形零件具有较高的可信度，而对以深拉延变形为主的成形零件可信度不高。

When application FLD for analyzing the safety of formed parts and the selection of materials , the result is quite reliable where the deformation is mainly plane strain and swell , but unreliable for deep drawing parts .

成形极限图通常是通过钢模胀形试验测得，实际测量的成形极限图与ASAME自动应变测试分析系统模拟计算的成形极限曲线吻合较好；

FLD is measured usually by rigid die swell test , the FLD measured in real tests is in conformity with that got by analogue computing in ASAME ( Automated Strain Analysis and Measure Environment );

Hill（1979）屈服准则的展开及在金属薄板成形极限图中的应用

Hill 's yield criterion ( 1979 ) and its application to predict sheet metal forming limit diagram

镁合金板材成形极限图（FLD）的实验研究

Experiment Research on the Forming Limit Diagrams ( FLD ) of Magnesium Alloy Sheet

薄板成形极限图（FLD）的多项式拟合分析

Analysis of polynominal fit on the forming limit diagram ( FLD ) for sheet metal

结果表明，根据此方法计算的左半侧（拉深应变区）成形极限图与实验获得的FLD基本一致。

The calculation FLDS of the draw strain side show good agreement with experiment FLDS .

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。

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

铝合金AA6082（T5）挤压型材基本力学性能试验和成形极限图的建立

An Investigation of Material Properties of Aluminium Extrusions 6082 ( T5 ) and the Establishment of FLD

在车门内板模拟分析中，运用FLD（FormingLimitDiagram）成形极限图判别模拟过程中可能拉裂现象，并研究分析了最终的板料厚度和厚向应变分布。

FLD ( Forming Limit Diagram ) is used for possible defect detection during the simulation of the car door inner panel , and the distribution of the final thickness and normal strain of sheet metal is studied .

成形极限图（FLD）反映了板料在各种应变路径下的应变极限，是综合衡量板料成形性能的一个重要指标。

A formation limit diagram ( FLD ), which shows the strain limit of sheet metals under various strain conditions , is an important indicator for assessing sheet metal formation performance .

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 .

采用经过单向拉伸预变形的板料进行拉深试验，结果表明采用本文提出的韧性断裂准则比成形极限图（FLD）能够更准确地预测非线性变形路径下的板料拉深过程中的破裂现象。

Deep drawing process of pre-strained sheet metal by uniaxial tension is carried out , which confirms that the newly proposed ductile fracture criterion more accurately predicts ductile fracture compared with forming limit diagram ( FLD ) .

板料的成形极限图（FLD）一般是在线性加载（简单加载）和近似线性加载的条件下得到的，因此用这个准则去分析复杂加载路径下板料成形成败的有效性就有显偏颇。

The strain-based forming limit diagram is generally obtained on the linear ( proportional ) or near linear loading condition . So it often leads to erroneous assessments on the analysis of blank sheet formability under complex strain paths by the FLD criterion .

凸模直径以及试件形状对成形极限图的影响

Influence of Punch Diameter and Specimen Shape on Formation Limit Diagram

椭圆凹模液压胀形法制作成形极限图

Study on Forming Limit Diagram by bulging with Elliptic Die

正变异性板材成形极限图右部曲线的预测

Prediction of Right-Side Curves in Forming Limit Diagram of Anisotropic Metal Sheet

激光拼焊板成形极限图的理论建立方法

Theoretical Establishment of Forming Limit Diagram for Laser Tailor-welded Blanks

坐标网分析技术与成形极限图的应用

Application of coordinate net analysis technology and forming limit diagram

基于数值模拟的应力成形极限图的应用研究

Study on Application of Forming Limit Stress Diagram Based on Numerical Simulation

成形极限图的测试、应用和可信度分析

Analysis on measurement , application and reliability of FLD

厚向异性薄板成形极限图的计算分析

Analysis and Calculation of a Forming Limit Diagram of the Planar Anisotropy Sheet

激光拼焊板成形极限图性能分析

Forming Limit Diagram Analysis of Tailor Welded Blanks

冲压成形极限图虚拟试验

Virtual Testing for Forming Limit Diagram

汽车钢板胀形区成形极限图的预测与验证

The Prediction and Validation of Bulging Region of Forming Limit Diagram ( FLD ) of Steel Sheet

基于有限元仿真的左半边成形极限图建立方法

A New Method to Predict the Left Side of the Forming Limit Diagram Based on the Finite Element Method

用塑性拉伸失稳理论预测板材成形极限图右部曲线的一种新方法

A New Method of Prediction of the Right-Side Curves in Forming Limit Diagram of a Metal Sheet by Theory of Plastic Tensile Instability

通过对比一般方形毛坯和优化毛坯的成形极限图，证明优化毛坯具有更好的成形性。

In order to prove that the optimum blank had better formality than the general rectangular blank , both finite limit diagrams were compared .

将厚度梯度准则与有限元方法相结合，可在已知薄板单位性能参数的条件下计算获得其成形极限图。

By combining the " thickness gradient criterion " and FEM , the FLD of sheet metal can be calculated when the tensile properties is available .

通过减少焊缝移动量，在成形极限图、应力分布、应变分布和厚度减薄率这四个方面改善拼焊板的成形性能。

After decreasing weld-bead movement , the formability of tailor-welded blanks is greatly improved according to the forming limited diagram , stress distribution , strain distribution and thickness thinning .

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。

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 .