查询词典 sheet metal

In MPF, the dynamic explicit finite element arithmetic is very suited to simulate the sheet metal forming because the contact between the elements and the sheet is discontinuous and the loading condition is very complicated.

在板材的多点成形过程中，由于基本体和板材之间接触状态不断发生变化，加载条件及其复杂，应用动态显式有限元算法求解具有明显的优势。

Four-node degenerated shell element and rigid shell element are used in our FEM model.Updated Lagrange formulation and rate form constitutive equation are adopted to solve the problem of large strain and large rotation in sheet forming process.Sheet metal material property is described by plastic anisotropy yielding model and isotropic hardening model.Master surface-slave surface contact model is used to define the contact between tools and blank.Contact constraints are enforced with a kinematic algorithm and friction stress is computed by Coulomb friction law.Dynamic relaxation method is used to treat springback after forming stroke.

四结点蜕化壳单元和刚体壳单元分别用来建立板和模具的有限元模型；更新Lagrange法和速率型本构关系被用来处理板料变形中的大应变和大转动；材料模型采用塑性各向异性屈服与等向强化模型；通过主从面模型定义板料和模具的接触，接触算法采用运动约束法，摩擦力用库仓定律计算；并利用动力松弛法对回弹过程进行了计算。

Sheet Lightning is a specialised engineering 2D/3D CAD System for creating and unfolding sheet metal designs for fabrication or manufacture.

板材闪电是一个专门工程的2D/3D CAD系统的建立和开展钣金件的设计，制造或生产。

Based on the analysis of forming characteristics of the complicated vehicle parts and the actual formability of sheet metals, a new method assessing the press forming levels of deep-drawing sheet metal has been advanced.

对汽车复杂冲压件的变形特点和钢板的实际成形能力进行分析，提出了利用平面应变点FLD0对深冲薄钢板冲压级别进行分类的新方法，并将汽车深冲薄钢板分为七个级别。

Based on Hill' elastic-plastic instability theory,the velocity field for sheet instability which is caused by the shear stress during sheet metal forming is developed,and the theoretical formula of the wrinkling critical shear stress is proposed.

以Hill关于弹塑性失稳理论为基础，建立了剪应力起皱失稳的速度场分布，给出了临界起皱剪应力理论计算结果，分析了板料屈服强度、硬化指数、板厚方向性指数及板料厚度对临界剪应力的影响，并与实验和数值模拟结果进行了对比。

The grid based measurement of the distribution of in-plane principal strain and thickness variation of sheet metal stamped parts after drawing process is an effective way to perform sheet forming analysis.

基于网格测量板料冲压零件拉延成形的面内应变分布和厚度变化，是进行冲压成形分析的一种有效手段。

Laser bending is a forming technology which makes use of a thermal stress and thermal strain to achieve sheet metal bending in recent year, and it needs no die and external force. The laser beam energy has good controllability. Laser technology is used in forming of magnesium alloy sheet, this can full play the unique advantages of the technology.

激光弯曲成形是一种利用热应力来实现板材成形的技术，激光弯曲成形不需模具和外力，且激光束能量集中具有良好的可控性，将激光成形技术用于镁合金板材成形，可以充分发挥该技术的独特优势。

A newly developed approach, in which sheet metal forming and plastics injection molding are integrated, was used to manufacture complex components combined with aluminum sheet and polypropylene with the mold of non-flat bottom via plastics injection molding machine.

摘 要：在注塑机上利用非平底凹模制备了形状较复杂的铝板/聚丙烯复合结构件，实现了将金属板料成形、塑料注射成形融为一体的复合成形的新工艺。

Metal network hole wave packing with metal sheet metal punching, draw to mangle network block specific specification, surface its form regular rhombus network hole is then punching to become ripple a kind of packing of form, this kind of packing comprehensive silk screen packing and merit of the board wave packing , have the characteristics that light, press reducing, efficiency high.

金属网孔波填料是用金属薄板冲压、拉伸成特定规格的压延网片，其表面形成规则的菱形网孔，然后冲压成波纹形状的一种填料，这种填料综合了丝网填料与板波填料的优点，具有重量轻、压降低、效率高的特点。

Metal network hole wave packing with metal sheet metal punching, draw to mangle network block specific specification, Surface its form regular rhombus network hole is then punching to become ripple a kind of packing of form, This kind of packing comprehensive silk screen packing and merit of the board wave packing , have the characteristics that light, press reducing, efficiency high.

金属网孔波纹填料是用金属薄板冲压、拉伸成特定规格的压延网片，其表面形成规则的菱形网孔，然后冲压成波纹形状的一种填料，这种填料综合了丝网填料与板波填料的优点，具有重量轻、压降低、效率高的特点。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。