The pressure may be applied simply by a tension/compression machine (22, 23).

This deformation caused by traction and compression tends to cause a slight elastic recovery effect.

In order to take into account tensile, compressive, lateral and torsional forces, the invention uses a central block and elastic loops at each end of the central block.

Whirl tower for measurement of tensile and compressive forces of the helicopter rotor, image: Marenco Swisshelicopter

Vulcanized rubber has enhanced elastic deformability properties within relatively broad ranges of applied traction and compression loads.

The tensile and compressive forces it is capable of withstanding

Load due to dynamic traction forces and compressive forces

the tensile and compressive forces it is capable of withstanding

The tensile and compressive forces it is capable of withstanding.

The invention ensures that the tensile and pressure forces are properly controlled.

Type of end coupling (indicating tensile and compressive forces

When the needle is extracted, the thread-spiral remains under skin preserving the compression or extension properties thereof, thereby producing a skin compression or extension effect.

The resilient coupling members (16) can be provided in the form of or built in as pressing elements, tractive elements or as combined pressing/tractive elements.

Reliable and robust, our Ultrasonic fatigue machines test materials in Tension-Tension, Tension-Compression and Compression-Compression on more than one billion cycles in less than 14h..

The tensile strength and compression set are improved.