AutoForm Develops Kinematic Hardening Model
 ZURICH,
Switzerland, Jul 7, 2009 - AutoForm Engineering GmbH, the leading supplier
of software solutions for the sheet metal forming industry, has developed a
new material model. This model is well suited for a wide spectrum of modern
materials and is currently one of the best and most advanced material
models. It enables AutoFormplus R1 users to achieve a new level of accuracy
in springback simulation.
Springback: U-profile simulated without (left) and
with (right) kinematic hardening model
In order to further improve springback simulation results, AutoForm has
developed a new material model. This model enables the accurate description
of material behavior at unloading, which is crucial for springback. It
provides for both the softening of materials through the so-called
Bauschinger effect, as well as the reduction of elasticity with increased
strain. It is thus one of the most accurate material models currently
available. An invaluable benefit is that it is completely compatible with
current AutoForm material models, i.e. existing material data which is in
widespread use can continue to be applied. With the addition of only four
new parameters, the effects of kinematic hardening are taken into
consideration. These parameters are not mathematically abstract values, but
rather they have a comprehensible, clearly defined physical meaning. They
can therefore simply be defined from, for example, tension-compression
tests. On the other hand, should this work not be carried out, AutoForm
offers default values per material group. This is possible since each of the
parameters describes one independent physical effect. By using this
kinematic hardening model, with practically no additional work, substantial
improvements in accuracy can be achieved. The result is reliable springback
compensation of the die faces aided by simulation, which in general
significantly reduces the number of tryout loops.
Dr. Waldemar Kubli, CEO of AutoForm Engineering, stated: “We are glad that we
can offer such a sophisticated model to our customers. However, the
successful solution to springback problems requires not only an accurate
springback simulation. What is just as important is an integrated geometry
compensator as well as a springback robustness assessment, since only stable
processes can be compensated. AutoForm, with its products
AutoForm-Compensator and AutoForm-Sigma, is the only integrated software
available on the market which can offer all the essential components to
successfully tackle challenging springback problems.”
Springback: The introduction of new, state-of-the-art materials, such as
ultra-high-strength steels and aluminum, which are increasingly being used
to reduce the weight of vehicles, promotes the development of new material
models that authentically describe their characteristics. Parts stamped from
these materials are more affected by springback than those made from mild
steels. Springback modifies the final shape of the part and increases
manufacturing costs. Predicting the final geometry of a part after
springback and designing appropriate tooling to compensate for springback
continues to pose practical problems in the manufacturing industry.
About AutoForm Engineering GmbH
AutoForm offers software solutions for the die-making and sheet metal forming
industries along the entire process chain. With over 200 employees, AutoForm
is recognized as the leading provider of software for product
manufacturability, tool and material cost calculation, die face design and
virtual process optimization. All of the Top 20 automotive OEMs and most of
their suppliers have selected AutoForm as their software of choice. Besides
its headquarters in Zurich, AutoForm has offices in Germany, The
Netherlands, France, Spain, Italy, USA, Mexico, India, China, Japan and
Korea. AutoForm is also present through its agents in more than 15 other
countries.
For more information, visit
www.autoform.com.
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See Also
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website
CAD - Sheet Metal Design - by TenLinks.com
Additional News
Jan 20 - AutoForm Applies Springback Compensation in Metal Stamping
Nov 17 - AutoForm Develops Hot Forming Simulation Process
Sep 29 - AutoForm Develops Pilot Models for Progressive Die Stamping
Sep 8 - AutoForm Develops Cost Optimized Process Plan Module
Jul 7 - AutoForm Develops Kinematic Hardening Model
Mar 31 - AutoFormplus Products Unveiled for Sheet Metal Forming
Mar 17 - AutoForm Wins Swiss Venture Club Award for Entrepreneurs
Oct 23 - AutoForm EasyBlank Add-On Includes Feasibility, FLD Diagram
Oct 17 - AutoForm v4.2 Unveiled for Sheet Metal Forming
Aug 25 - AutoForm Opens Office in Hong Kong
Jul 30 - AutoForm EasyBlank Add-On Module Imports CAD Files
Source: Material used in press releases is often supplied by external
sources and used as is.
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