AASHTO T285 Test Fixtures & Test Systems Model: G-AASHTO-T285
The Mandrel-to-Die Ratio: Under AASHTO T285, the strain on the outer fibers is strictly controlled by the plunger radius. A common engineering error is using a universal V-block that doesn’t match the specific 2t requirement.
Technical Specifications
| Specification | Value |
|---|---|
| Test Type | Standards |
| Industry Standard | AASHTO T285 |
| Interface Description | Optimized for TestResources Load Frames; universal adapters available for legacy systems. |
Interface & Compatibility
Expert Commentary
Plunger Alignment Dynamics: The AASHTO T285 guided bend test is a foundational validation for ductile iron pipe weldability. To ensure a valid test, the fixture must utilize hardened steel rollers or a high-lubricity die surface. If the specimen seizes against the die walls due to friction, it introduces unintended longitudinal tension, which artificially lowers the apparent ductility. Any lateral walk of the plunger during the stroke will result in asymmetrical loading, causing the specimen to twist. This twist is the leading cause of non-conforming results in pipe welding qualification.