Three-Point Bending

The rigidity of catheter, stent, or endovascular device is measured using a three point deflection method. The sample rests perpendicular to two lower static supports, with an applied deflection site centered between them. A displacement is applied at a fixed rate while measuring the resultant force. The test stops when the displacement reaches 0.2 x span length.

Test Procedure

The sample rests perpendicular to two lower static supports, with an applied deflection site centered between them. The spacing of the two supports is determined by the protocol. A displacement is applied using a piston at a fixed rate while measuring the resultant force. The test stops when the displacement reaches 0.2 x span length.

Equipment

-Three-point deflection test bench with piston and stepper motor

-Regulated temperature bath

-Calibrated load cell

-Calibrated gauge blocks

-Data acquisition system

Measured Parameters

Displacements and forces are recorded.

Service Levels

Applicable Standards

ASTM F2606 – 08(2014)
Standard Guide for Three-Point Bending of Balloon Expandable Vascular Stents and Stent Systems
ISO 25539-2:2020
Cardiovascular implants — Endovascular devices — Part 2: Vascular stents

Related Tests

OLE0809

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