The standards covers bend testing of material for ductility under different boundary conditions. One of the more common is the guided-bend test, that uses a 3-point bend setup without using a female die.
The bend test is performed by placing either a rectangular or round specimen symmetrically on the support fixture that is mounted to the testing machine. The load is applied to the specimen at mid-span until either failure occurs, or until the predefined angle of bend, or maximum angle for the fixture is achieved. The angle of bend is determined while the specimen is under bending load, by the projection of lines with the flat surfaces of the specimen outside of the bend region and is the intersecting angle of these lines. After the bending test is completed, the curved surface of the bend is examined for evidence of a crack or surface irregularities to determine if the material has failed.
Please refer to the standard for more detailed information about the other test setups; guided U-bend or V-bend; semi-guided bend; free-bend; bend and flatten.
Solutions for ASTM E290 guided-bend test typically include these types of components:
Load Frame Options
MTS offers electromechanical Criterion® and Exceed® universal test systems and dynamic servohydraulic Landmark® test systems that are ideal for performing accurate and repeatable monotonic bend testing of metallic materials per ASTM E290.
MTS Criterion universal testing systems are engineered to support the needs of advanced Research & Development. MTS Exceed universal testing systems are best suited for Quality Control testing by delivering the reliable performance needed to meet the uptime demands of high-volume production environments. Due to the large variety of metals and specimen dimensions that can be tested per ASTM E290, the required force capacities can differ significantly. MTS offers frame models that address the smaller force requirements for testing thin-sheet specimens up to high-force requirements for testing solid cylindric specimens with a large diameter.
The MTS Criterion and the MTS Exceed universal testing machines range from tabletop to floor-standing electromechanical models with force ratings of up to 600 kN / 135 kip. Many of the models have dual-zone test spaces to reduce set-up times if you frequently change test requirements.
The MTS Landmark dynamic servohydraulic test system with its superior stiffness and alignment capabilities, is an ideal choice if additional fatigue and fracture testing capabilities are required. Systems are available in highly configurable floor-standing and tabletop models with force ratings from 5 kN / 1 kip to 500 kN / 110 kip.
As an alternative to a new load frame, you can replace outdated controls / hydraulics of existing MTS or another manufacturer’s electromechanical, servohydraulic or custom test systems, including: **Instron®, **Zwick®, **Tinius Olsen™, **SATEC®, **Baldwin® and more with an MTS ReNew™ Upgrade.
**Trademark owned by their respective owners, not affiliated with MTS Systems Corporation.
For other options related to this standard, please download the application test method tech note on this page.