Material Model Validation

Veryst offers material model validation services to our clients. Once a material model has been selected and calibrated to test data, Veryst recommends validating the model by performing a test with a stress state different from any used for calibration. This test can be complex and include inhomogeneous deformation, and such a test ensures that the model can accurately represent the material in load cases other than those encountered during the tests. We recommend performing, when possible, a test that is representative of the stress state the product will experience. Some tests we often recommend are:

• Small punch test
• V notch shear (Iosipescu)
• Indentation testing
• Instrumented ball impact test
• Dynamic punch test
• Three- or four-point bending
• Notched tension tests

We often use digital image correlation (DIC) to measure the non-uniform strain fields in the material.  The example below shows a shear test used for material model validation.

Shear strain contours computed using digital image correlation (DIC) from an Iosipescu (V-notch) test on a thermoplastic material

Talk to an Expert About Your Material Characterization Needs

Whether you are selecting a material, diagnosing an unexpected failure, validating a design, or developing inputs for analysis, Veryst can design a test program that targets the properties most relevant to your application. Talk to a Veryst expert about how custom test geometries and fixtures can help you validate your material model and support your product development, qualification, or failure analysis.