Summary of Test
ASTM C393 is a test method designed to determine the core shear properties of sandwich constructions. The shear properties are determined via a bend test in a 3- or 4-point loading condition. This test standard requires a very unique articulating bend fixture with pressure pads to help provide the most accurate and consistent core shear results possible, even with the sometimes difficult to control process of manufacturing sandwich constructions.
Before conducting ASTM C393, it is important to read the entire specification in the relevant ASTM publication.
Recommended Equipment
Testing Procedure
- Prepare the test specimens as described in the test method.
- Depending on your requirements and expected results, select the appropriate bending condition (3-point vs. 4-point options) and configure the bend fixture accordingly. Be sure that the correct specimen geometry is selected in MTESTQuattro as analyses are calculated differently for 3- and 4-point tests. Care should be taken to modify the bend fixture pads, as necessary based on specimen construction, to try and prevent core crushing or facing panel failures during test.
- Insert and carefully align the test specimen within the fixture.
- Apply a compressive load to the specimen using a displacement rate that completes the test within 3-6 minutes. The suggested standard speed is found in the testing standard. MTESTQuattro will record the force and deflection data.
- Continue the application of force until the specimen fails, or the deflection is equal to the specimen thickness.
Just Ask!
Questions about running ASTM C393 on your system?
