Medical Device Testing Services
Medical Device Testing Services
 

Bend Fixtures

Compression Bending 

Compression bend fixtures apply axial motion to the distal and proximal ends of a device that is preformed into an omega (or "inch-worm") shape. As the ends are brought together the radius of the specimen bend decreases. Unlike pure bending where only one bend radius is created, the compression bend fixture creates three bend radii (distal, center, proximal). Since the bend angle at the center radius is most extreme, this is where the specimen fails first. This approach can be used to evaluate the bending fatigue resistance of peripheral stents and pacemaker/defibrilator lead wires.

Compression Testing of a Peripheral Stent 
Compression Testing of a Peripheral Stent

Compression Testing of a Defribillator Lead 
Compression Testing of a Defribillator Lead

These fixtures are ideal for devices that require smaller bending radii. To facilitate the compression bending, one or more axial actuators are used to bring the specimens ends together at a fixed displacement. The fixtures are designed to accommodate a statistically significant number of test specimens (up to 20 can be mounted in the fixture shown) and they can be used with either a heated air chamber or heated PBS flow loop.

Contact us with your specific test requirements and we will provide an estimate for creating the desired bending you are looking for.