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Version: 1.x

Dynamic Testing

Overview​

Dynamic testing involves subjecting materials to cyclic loading, pushing them within their elastic limits until fatigue-induced failure. This approach contrasts with quasi-static loads in traditional testing methods like tensile tests. Dynamic tests typically stress materials repeatedly, assessing their resilience and endurance to cyclic forces.

Key Aspects​

  • Cyclic Loading: Applies cyclic stress within the material's elastic range until fatigue failure occurs.

  • Common Test Types: Include high and low cycle fatigue, fracture mechanics, and simulated tests for various products.

Components of Dynamic Testing Machines​

Dynamic testing machines consist of several key components:

  • Test Frame and Load Cell: Equipped with specialized software, grips, and material-specific accessories.

  • Adaptability: Can be customized to test different materials within its force range by altering fixtures and setups.

Characteristics​

  • Range: Spanning from low to high force capacities (1000 N to 5 MN) and diverse dynamic performance capabilities (1 Hz to 100 Hz).

  • Technological Variations: Utilizes servo hydraulic actuators, servo electric motors, and linear electric motors to suit different testing requirements.

Significance​

Dynamic testing aims to simulate real-world scenarios where materials undergo repetitive loading. This testing methodology is crucial for understanding a material's fatigue behavior and its endurance limits under cyclic forces, offering valuable insights for product development and material selection.

Noteworthy Standards​

Dynamic testing adheres to established standards set by organizations such as ASTM and ISO, ensuring consistent testing parameters and results across various materials and products.

Examples of Standards:​

  • ASTM E647 / E399 / E1820: Cover crack propagation, ductile and brittle fracture, and specimen geometries.

  • ISO 14801: Focuses on testing angled dental implants across different sizes and geometries.

  • ASTM F1717: Designed for spinal fixture compliance, adaptable for clinical applications and spinal locations.