DYNAFORM软件是美国ETA公司和LSTC公司联合开发的用于板料成形数值模拟的专用软件，是LS-DYNA求解器与ETA/FEMB前后处理器的完美结合，是当今流行的板料成形与模具设计的CAE工具之一。

在其前处理器(Preprocessor)上可以完成产品仿真模型的生成和输入文件的准备工作。求解器(LS-DYNA)采用的是世界上最著名的通用显示动力为主、隐式为辅的有限元分析程序，能够真实模拟板料成形中各种复杂问题。后处理器(Postprocessor)通过CAD技术生成形象的图形输出，可以直观的动态显示各种分析结果。

Dynaform 软件基于有限元方法建立, 被用于模拟钣金成形工艺。Dynaform软件包含BSE、DFE、Formability三个大模块，几乎涵盖冲压模模面设计的所有要素，包括：定最佳冲压方向、坯料的设计、工艺补充面的设计、拉延筋的设计、凸凹模圆角设计、冲压速度的设置、压边力的设计、摩擦系数、切边线的求解、压力机吨位等。

Dynaform软件可应用于不同的领域，汽车、航空航天、家电、厨房卫生等行业。可以预测成形过程中板料的裂纹、起皱、减薄、划痕、回弹、成形刚度、表面质量，评估板料的成形性能，从而为板成形工艺及模具设计提供帮助。

Dynaform软件设置过程与实际生产过程一致，操作上手容易。来设计可以对冲压生产的全过程进行模拟：坯料在重力作用下的变形、压边圈闭合过程、拉延过程、切边回弹、回弹补偿、翻边、胀形、液压成形、弯管成形。

Dynaform软件适用的设备有：单动压力机、双动压力机、无压边压力机、螺旋压力机、锻锤、组合模具和特种锻压设备等。

eta/DYNAFORM is an LS-DYNA-based sheet metal forming simulation solution package developed by Engineering Technology Associates, Inc. The specialty CAE software combines the sheet forming analysis power of LS-DYNA Versions 971 with the streamlined pre- and post-processor functions.

These analysis codes and interactive functions are uniquely integrated to service the sheet metal forming industry in tooling design and development, which helps designers reduce tooling development time and tryout lead-time.With its superior usability and intelligent tools, eta/DYNAFORM can easily solve all kinds of sheet forming problems. The program also maximizes traditional CAE techniques to reduce prototyping costs and lead time for product development.

eta/DYNAFORM’s analysis engine is LS-DYNA, which is developed and currently supported by the Livermore Software Technology Corporation (LSTC) of Livermore, California. It is a general purpose, non-linear, dynamic, finite element analysis code utilizing explicit and implicit capabilities for solving fluid and solid structural problems. The code has been developed for applications such as automobile crashworthiness, occupant safety, underwater explosion, and sheet metal forming.

The bottleneck of the metal forming development cycle is the hard tooling design lead-time. The eta/DYNAFORM CAE approach simulates this tooling process and thereby reduces the tooling tryout time and the associated cost for producing high quality stamped parts. eta/DYNAFORM effectively simulates the four major design concerns in the tooling process: Binder Wrap, Draw Die, Springback, and Multiple Stage Tooling. These simulations enable engineers to conduct feasibility studies of a product design early in the design cycle.

eta/DYNAFORM features well-defined tooling surface data to predict the performance of a stamping for areas such as Tearing, Wrinkling, and Thinning, in addition to predicting Skid Mark and Springback effects.

Major improvements

1. Streamlined the BSE interface.

2. In the DFE module, the user can now parametrically build the die face for a symmetrical part.

3. Added new product change replacement functionality. The user can easily retain the current die face design and drop in new product design surfaces.

4. Added the ability to support a user defined ‘Geometry Drawbead’ and ‘Line Bead Conversion Library’

5. In “AutoSetup”, added the standard nitrogen cylinder force curve library for binder control.

Newly Implemented Capabilities, Features and Functions in the BSE Module

1. Added a new BSE project interface, which allows the user to set unit, material density and sheet type before analysis and calculation.

2. Added the ‘Auto Mesh’ option in the “Preparation Import” dialog to mesh the CAD model immediately after it is imported.

3. In the "Generate Middle Surface" function within the “Preparation” menu, the program now automatically adds the middle surface layer to the current tool. It also removes other layers from the current tool after the middle surface is generated.

4. Added the ability to add the top and bottom surface layers of the part to the current tool and remove other layers in the current tool after the "Separate Surface" function in the “Preparation” menu.

5. The “MSTEP” mesh is now set as the default in the “Preparation” menu’s "Surface Mesh" function.

6. Added a "Symmetry" function, which automatically checks the symmetry, based on the defined symmetry plane.

7. Added a new function for automatically adjusting the stamping direction in “Tipping”, called “Element Normal”. The average normal for the selected mesh is applied as the stamping direction.

8. Improved the “Double Attach”, “Inner Fill” “Boundary Smooth” and “Sidestep” functions. Refer to the DFE module for descriptions.

9. The “MSTEP”, “Outline” and “Nesting” functions are now integrated into one dialog box arranged in tabs, allowing the user to easily switch among these functions.

10. “Draw” and “Trim Line” in “MSTEP” are now separated, allowing the user to configure them individually.

11. Improved the "Generate Outline" function in “MSTEP”.

12. Added the "Select All Parts" option in “Define Sheet Material” of BSE, allowing the user to define the material property for all the selected parts.

13. Added the ability to define the "Boundary Condition", by region, for “MSTEP” outlines.

14. Streamlined the “Nesting” interface.

15. Added the ‘Free’ option so the user can manually adjust the blank.

16. Added the ‘In One Row’ option in the “Constraints” menu for "Two-Pair" and "Mirror" to display the nesting results in one row.

17. After adjusting the step under “Draw nesting type”, the trim line now automatically returns to the original position after finishing the operation in “Calculate 3D”.

18. Added the "Plate" nesting function, allowing the user to constrain the nesting result through

the definition of blank length and width.

19. Removed the "Batch MSTEP" and "Batch Nesting" functions.

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About Engineering Technology Associates, Inc.

ETA provides engineering & development services from Concept to Product. The company offers a variety of services including product design, complete product development solutions, computer aided engineering (CAE) analysis, finite element analysis (FEA) analysis and IT services. A tier-one supplier to the global automotive industry, it offers expertise in NVH, metal forming, crashworthiness, occupant safety and product design. Advanced CAE experience has led to the development of its Accelerated Concept to Product (ACP) Process™, a product design/ development method based on design optimization.

ETA is also the developer of simulation and analysis software tools. The Inventium Suite™ is ETA's enterprise product development solution. The suite offers a high performance modeling and post-processing system, with a robust path for the integration of new tools and third party applications. ETA's software products address many needs including finite element (FE) modeling, crash/safety analysis, drop testing, fluid structure interaction, metalforming and stamping related analysis. These engineering tools offer a variety of applications including in the automotive, aerospace, military, consumer electronics, appliance, civil engineering and renewable resource industries.

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