A full service for FEM material input decks
Finite element analyses with nonlinear material
behaviour, e.g. forming or crash simulation, require a
good description of the material behaviour. Obtaining
reliable material parameters is not trivial. MATFEM can
test your materials and derive material input data for
your FEM analyses.
We cover a wide range of material models for various
commercial explicit simulation codes.
We characterize your individual material and do not
offer data from a general material database.
The service is fully transparent to our customers.
We provide all lab data, lab reports, a
theoretical report on
the parameter identification process and a comparison of
the identified model data with the original lab data at
the end of the project.
The customer holds the rights to all lab data and
Reliable material data in six steps
Discuss the simulation problem
The first step is to assess the simulation problem
at hand and to identify the important physical effects
that should be considered in the material model.
Material modelling comprises a vast range of
aspects. For a single application, only a subset of this
range is important. We can help you to find out which
aspects of the material behaviour are worth modelling
in detail and which aspects can be neglected.
Select the proper material model
The commercial finite element codes provide
various material models. Depending on the problem,
we can help you to choose an appropriate model, for
which we will prepare the data. We also provide
material data for MATFEM’s material model
MF GenYld + CrachFEM.
Define an experimental programme
We define a cost-effective test programme which takes into
account the special properties of your material and the
application field of the simulation.
For example, fracture tests are carried out only for
materials with low ductility. Tests with load reversal may
not be needed for some simulations, but recommended for
The experimental programme is discussed with the customer.
The project’s time frame, data available from customer facilities
and the required quality are taken into account.
The programme is modular. Costs are assigned to each
module such that individual modules may be skipped or
Carry out experiments
MATFEM has a network of specialized partner labs at
universities, research institutes and private companies
from Germany and other countries. In cooperation with our
partner labs, new tests and specimens are developed.
We select the most appropriate partner labs for each
project. If the customer can provide their own test
results, those results can be included in the process.
Identify material data
We use in-house software to derive all material
parameters for a theoretical phenomenological
material model from basic tests. This theoretical
model is independent of the finite-element solver.
By fitting clearly described basic load cases well,
the material model should be able to describe the
material behaviour for arbitrary loads. Inverse
iterative procedures usually yield parameters that are
valid only for limited load cases. Therefore, such
procedures are kept to a minimum.
Prepare and test material cards
After parameter identification we create the
material input for the chosen models. We also simulate
test cases with the selected FEM software to validate
the material card.