1)forming limit diagram成形极限图
1.Application of thickness gradient criterion in establishing forming limit diagram;厚度梯度准则在成形极限图建立中的应用
2.Prediction of sheet metal forming limit diagram by applying ductile fracture criterion;应用韧性断裂准则预测板料的成形极限图
3.Summarizes the existing methods for determining the formability of tube,the relevant methods mainly concentrate on the n,r value of tube for hydrofoming,geometric parameter and the forming limit diagram which is formed on the criterion for determ.总结管材性能评价方法的研究现状,目前判定标准主要集中于管材的硬化指数n,各向异性指数r值,以及几何参数和判定准则形成的成形极限图等方面。
英文短句/例句
1.Prediction of forming limit diagram of aluminum sheet at elevated temperatures温成形中铝合金板成形极限图的预测研究
2.Theoretical Establishment of Forming Limit Diagram for Laser Tailor-welded Blanks激光拼焊板成形极限图的理论建立方法
3.The Applied Program Development of DYNAFORM Based on Forming Limit Stress Diagram Criterion;基于成形极限应力图判据的DYNAFORM的应用程序开发
4.Experimental Study on Drawing and Compressing Area of Forming Limit Diagram for Stainless Steel不锈钢成形极限曲线图(FLD)拉压区试验研究
5.Research on FLSD and Application in Multistage Sheet Metal Drawing;成形极限应力图及其在多道次拉深成形中的应用研究
6.Effect of forming angles on formability in single point incremental forming单点渐进成形中成形角对成形极限的影响
7.The Research on the Limit Parameters for One-Operation Forming the Conical Part in Deep Drawing;圆锥形零件一次成形极限参数的研究
8.Research on Deformation Mechanism and Forming Limits of Tube Inversion;翻管变形机理及翻管成形极限的研究
9.Prediction of Defects in Tube Hydroforming Based on Forming Stress Limit基于成形应力极限的管材液压成形缺陷预测
10.Limit Cycles in a Temporal Morphogenesis Model;关于颞部骨块形成模型的极限环问题
11.Forming limits and cavitation behaviors of superplastic Al6061/20SiC_w sheetAl6061/20SiC_w板材的超塑成形极限与空洞行为
12.Fractal Limit Images of Chaotic Attractors with Crystallographic Symmetries具有平面晶体对称性混沌吸引子的分形极限图
13.Study on Forming Conditions for One-Operation Deep Drawing in Conical Part of Thin Wall;薄壁锥形件一次拉深成形极限条件研究
14.Forming limit and weld seam movement of TWBs with different thicknesses in square cup差厚拼焊板拉深方盒形件成形极限及焊缝移动
15.Limited Forms and Unlimited Images --Analyzing the Tai Chi Picture From the perspective of modern graph designing;有限形式与无限意象——从现代设计角度谈谈太极图
16.Limit Strains of Sheet Metal Forming under Broken-line Strain Paths(Ⅱ)--Calculating and Testing on the Limit Strains for Sheet Metal Forming复合变形路径下的板材冲压成形极限应变(Ⅱ)——冲压成形极限应变的计算与试验
17.Experimental Study on Shape Formation and Vertical Ultimate Load Capacity of Post-tensioned and Shaped Hypar Space Truss;后张拉预应力成形鞍形网壳的成形和竖向极限承载力试验研究
18.Effects of Drawing and Bulging Parts Forming Condition on Forming Limit拉深—胀形类零件成形条件对成形极限的影响研究
相关短句/例句
FLD成形极限图
1.ANALYSIS ON MEASUREMENT,APPLICATION AND RELIABILITY OF FLD;成形极限图的测试、应用和可信度分析
2.This paper provides an introduction to the research state of several directions of numerical simulation, such as FEM algorithm, contact and friction, FLD and defects.本文对板料成形数值模拟的几个主要研究方向 :有限元算法、接触与摩擦、成形极限图、缺陷等的研究现状进行了介绍 ,并且讨论了板料成形数值模拟今后的研究方
3)forming limit diagram(FLD)成形极限图
4)forming limit stress diagram成形极限应力图
1.A new method for establishing forming limit stress diagram of sheet metals;一种建立板料成形极限应力图的新方法
2.Based on the experimental results,the FLSD(forming limit stress diagram) was determined.论述了硬铝合金成形工艺中应变路径、固溶热处理和时效过程对成形极限的影响,由试验得到了单向拉伸预应变和固溶热处理后时效过程中的成形极限图FLD(Form-ing Lim itD iagram),重点研究了固溶热处理后时效过程中成形极限的变化,并得到了铝合金在时效过程中的成形极限应力图FLSD(Form ing Lim it Stress D iagram)。
3.In view of the above reason, this thesis adopts the forming limit stress diagram as the in.本文基于板成形专用有限元分析软件DYNAFORM,以国内外板料成形领域认同的具有应变路径独立性优点的成形极限应力图为判据进行了应用软件的二次开发,以期为板成形有限元分析软件提供一个新的失稳判据。
5)forming limit stress diagram应力成形极限图
1.A program of forming limit stress diagram is developed based on the finite element software Dynaform.根据极限应变到极限应力的转换关系,采用 Hill48塑性准则和 Hill79塑性准则建立了应力成形极限图的数学计算模型。
2.The forming limit stress diagram(FLSD) which established with limit stress is independent on the strain paths and it is practical to use as the criterion of forming limit under cmplex strain paths.由极限应力构成的应力成形极限图(FLSD)独立于应变路径,可作为复杂应变路径下成形极限的判据。
3.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。
6)forming limit diagram (FLD)成形极限图(FLD)
延伸阅读
成形极限图成形极限图forming limit diagram chengxing jixiontu成形极限图(forming limit diagram)由金属薄板在各种应变状态时所能达到的极限应变值所构成的图形，简称FLD。它用来表示金属薄板在出现局部变薄(失稳或颈缩)和断裂之前可能达到的变形水平。(见薄板成形性)极限应变值可采用板成形网格浏量技术实际测定或通过理论计算得到。 通过实验，求得一种材料在各种应力应变状态下的成形极限点，然后把这些点标注到以对数应变。，和::(或工程应变。;，￡:)为坐标轴的直角坐标系中，即可得到实验成形极限图(图1)。由于影响因素很多，判 120广一又一一—一——一门 100卜\\} _80卜\\也l 求一}\、l 侧{\。\一一一一司 创60卜\u\z尸产一二一一州 界】，\\尹端厂尹尸产一! 事，。}1\一多卜产T} 一40卜\z尸11 20卜二L} OL一一乙士兰之兰止亡一二二一二匕一二二止 一4D一30一20一10 0 10 20 3040 短辘应变/% 图1实验成形极限图 I一安全区;I一临界区;I一破裂区据不一，实验成形极限图数据比较分散，常形成一定宽度的条带，称为临界区。在临界区以上为破裂区，在临界区以下为安全区。 板材的硬化指数n、塑性应变比r值、厚度、应变路径、应变梯度、应变速率和网格测量方法等对成形极限曲线的形状和位置都有很大影响。 (1)板材二、r值的影响。n值增加时，材料的强化效应大，会提高应变分布的均匀性，因而使成形极限曲线提高。图2是根据M一K理论(见拉仲失德)计算的结果。根据M一K理论计算，r值增大时，拉一拉区的极限应变值降低。但皮尔斯(R.Pearce)的试验结果显示，除了平面应变状态以外，r值对成形极限曲线影响不太显著，但可看出。值下降，极限应变值也下降。一 一0 .5一0.3一0.1 0 0.1 0.2 0.30.40.5‘2 一0 .4一0.2 图Zn值对成形极限曲线的影响 (2)板材厚度的影响。实验和理论分析的结果都表明、成形极限曲线随着初始板材厚度的减薄而降低。这是因为当初始板厚较薄时，由板材的表面缺陷而产生的板厚不均匀性以及内部缺陷而使实际板厚下降，变形不均等间题比板厚较厚时更加严重。因此，在相同变形条件下，薄的板材容易先发生局部失稳并达到成形极限。另外，薄的板材在变形时应变梯度小，周围材料对危险区材料的补偿作用小，也会降低成形极限。 (3)应变路径的影响。
