A dynamic testing machine performs repeated loading mechanical testing. Where a tensile testing machine would apply a quasi-static load to measure the yield stress and ultimate tensile strength until the specimen reaches its break or rupture point, a dynamic testing machine usually stresses a material within its elastic region with cyclic loads until the specimen fails due to fatigue. The typical types of testing include high cycle fatigue, low cycle fatigue, fracture mechanics including pre-cracking, thermo-mechanical fatigue, and simulated tests such as athletic footwear, auto-injectors or stents. Dynamic testing machines utilize various technologies including servo hydraulic actuators, servo electric motors and linear electric motors.

Dynamic Testing Machine
1) Load Frame
Dynamic testing machine load frames can come as either Servo-hydraulic, Servo-electric or Linear-Electric depending on their force capacity and dynamic performance.
2) Software
Test software is where operators can setup the machine, create test methods, run the test and export the results.
3) Load Cell
The load cell is a transducer that measures the force applied to the test specimen. KASON’s patented Dynacell’s also incorporate accelerometers to remove the errors in load introduced by inertia from high speed dynamic testing.
4) Grips and Fixtures
A wide range of specimen grips and fixtures are available for specimens of different materials, shapes, and sizes.
5) Strain Measurement
Some test methods require measurement of a specimen’s elongation under load. KASON supplies several contacting and non-contacting devices suitable for dynamic strain measurement and control.