Bending test according to DIN 53442
DYNA-MESS provides testing machines to perform bending tests according to the DIN 53442 "Flexural fatigue testing of plastics using flat specimens". DYNA-MESS testing machines are adapted to test up to 5 specimens at the same time.
DIN 53442 standard
For continuous bending/fatigue tests on plastic specimens according to the DIN 53442 standard, the part must be clamped on one end and the other end is moved up and down to generate a dynamic load. The standard prescribe a mechanical operation over many cycles and a subsequent evaluation of the specimen.
Test up to 5 samples simultaneously with individual forces recording
DYNA-MESS testing machines for DIN 53442 are far beyond the minimum requirements of the standard.
First with its special fixture five samples can be tested at the same time. This feature minimizes the testing time in order to have a statistically valid sample size.
Secondly, the force applied on each sample is measured and recorded independently. Thus, it is possible to have a report for each sample.
By continuously recording data throughout the test period, it is possible to have a statement not only about the type of damages or change in the test parameters but also, the evolution of the damages or parameters while performing a test. All data are automatically recorded for further documentation.
Temperature measurement
In addition to the force measurement, it also possible to monitor the temperature of each sample during a test. This enables an accurate analysis of the evolution of the damages that occur to the sample during the test.
Cost-efficient servo-pneumatic drive
The testing machine is equipped with a servo-pneumatic actuator, which represents an inexpensive testing machine compared to a servo-hydraulic one. DYNA-MESS testing machines can also be used for other kinds of tests as compression/bending/fatigue according the DIN 50100.
Plastics and composites
DYNA-MESS testing machines can be used for static and dynamic tests on plastic and composite components.
Static and dynamic properties
Static tests are useful to investigate many characteristics of a material like stiffness at different operating points. Dynamic tests - or vibration tests - are useful to investigate the material behavior under cyclic force. A dynamic test can be defined as a cyclic load with or without pre-load. Typical properties that can be measured are:
- Static properties
- Hysteresis
- Stiffness at different operating points
- Dynamic stiffness
- Loss angle
- Damping
- Strength loss
- ....
Individual and fatigue tests
During those tests, the properties of the material are investigated under a long-term test to characterize the fatigue behavior. By continuously recording the data throughout the experiment, it is possible to have a statement not only about the type of damages or a change in the test parameters but also, the evolution of the damages or parameters while performing the test. All data are automatically recorded by DYNA-MESS software for further analysis.
Laboratory and serial testing
The test machines can be designed to do research and development in a laboratory or to be part of the production line for quality control inspections. Production integrated testing machines can be equipped with a feed system as a conveyor belt for example.
Cost-efficient servo-pneumatic and performance servo-hydraulic
Depending of the tests requirements (load, frequency, stroke), DYNA-MESS testing machines are designed with a servo-pneumatic or servo-hydraulic drives. The cost-efficient servo-pneumatic drive can be used for tests with a frequency up to 35Hz. For higher frequency and load, servo-hydraulic drives are used.
Single and multiaxial loads
Both uniaxial and multiaxial load can be applied. For example, it is possible to combine two linear actuators to generate torsion and tension stresses on a part.
cf.
Mechanical properties
Fatigue tests
High frequency tests
Dynamic test machines
Production integrated testing machines
Examples of applications for plastics and composites
