We test materials, structural details, and components under extreme uniaxial and multiaxial impact loads such as tension, compression, torsion, bending, or shearing. We specialize in destructive, highly dynamic materials testing for strain rate, temperature, and state of stress.
If you are looking for a particular materials testing method, please see the table for detailed information about the testing methods we can carry out in our test laboratory. This page also provides information about:
Highly dynamic materials testing vs. fatigue testing
We make a clear distinction between highly dynamic materials testing, with its destructive, impact loading, and testing materials for fatigue. Although the latter is sometimes also referred to as dynamic testing, the two types of testing have nothing substantive in common. When a material is fatigue-tested, it is subjected to many cycles of low loads below the yield point. For example, a drawer is opened and closed until the material fatigues. In contrast to this, highly dynamic materials testing is like a crash test for a material specimen or component.
What does highly dynamic materials testing test?
The mechanical properties of many materials change as loading rates increase: flow stresses rise, and the elongation at break increases or decreases depending on the material. This influences how much energy a component made of a certain material can absorb under impact loading before it fails. We test strain rate dependency by measuring the change in material properties using different testing methods and devices. After we have collected the material characteristics experimentally, we create material models for your simulations.
What are the particular challenges of highly dynamic materials testing?
The tests often last only a few milliseconds or microseconds. This places particularly high demands on the testing technology. Nordmetall’s measurement technology has a high cutoff frequency and a high measuring rate. For optical measurements, we use high-speed cameras. The short force pulse in highly dynamic materials testing causes the material to vibrate. So our testing devices are designed to allow low-vibration measurement. This low-vibration measurement itself is another particular challenge in materials testing.
Development of material models and material cards
From the results of the materials tests under different loads, orientations, strain rates, and temperatures, we derive material cards for numerical simulation, which we then validate by means of component tests. The material cards describe the strength behavior and failure behavior of your material.
If you need a material model, we will work closely with you to define the requirements. The desired temperature and strain rate ranges as well as the simulation quality have a decisive effect on materials testing costs.
For comparative tests in the slow, quasi-static range, we work with universal testing machines. For higher strain rates, we use special testing machines that can carry out low-vibration measurements and highly dynamic measuring devices for good measurement results. Our testing machines have specific fixtures and forms for material specimens to enable testing of the desired load type (tensile, compression, shear, or bending testing) with the best data quality.
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