Determining Material Strength and Durability

UDRI researchers perform dynamic material response analysis in the Dynamic Material Characterization Laboratory. We routinely use Split Hopkinson Bars (pictured above, left) to study the high strain rate response of materials in tension or compression, and we've tested metals, plastics, foams, composites and even bullets at strain rates ranging from 200 to >5,000/sec. Our researchers study shock wave phenomena using flyer plate experiments and validate material models using Taylor Rod impact experiments. Our experiments have enabled researchers to develop material constitutive models and Hugoniot Elastic Limit (HEL) curves.

We can perform testing over a wide range of temperatures (high-temperature testing pictured above, right). Contact us today to learn how we can test, evaluate, and validate materials to meet your requirements.

Capabilities

• Bar materials: INCONEL 718, AL 7075, and Polymeric
• Compression strain rates > 5000/s
• Constitutive modeling
• Failure criteria
• Flyer plate impact experiments
• Hopkinson bar tests
• LabVIEW® digital data acquisition
• Material properties characterization
• Shock wave propagation
• Taylor Rod material model validation testing
• Temperature: -58°F to +1500°F (-50°C to +800°C)
• Tension strain rates 200/s to >= 2000/s

Typical Projects

• Composite failure strain measurements using strain gauged samples
• Compression strength of low strength foams
• Derivation of Johnson-Cook model constants
• Determination of material strain rate dependency
• Frequency response function analysis of shock absorbing materials
• Strain to failure characterization
• Strength evaluation of advanced automotive steels

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