The software uses notched specimens (CT specimens) to evaluate the material elasto-plastic fracture toughness value (JIC). The test is conducted at constant loading rate under test-force control or CTOD control and the load is removed to calculate the crack length. The software plots graphs of the crack length increase (Δa) and crack growth resistance (J value) from the acquired data, calculates the JIC value, and evaluates its validity.
The 4830 has been developed as a controller for servo control type test devices to have the ultimate in advanced performance and operator ease. A single controller unit allows a variety of tests from testing of static properties through to testing of endurance and dynamic characteristics, and has all functions and performance required of a controller for testing machines for actual objects and structures in addition to materials.
The 4890 32-bit digital controller incorporates a high-speed DSP, high-resolution A/D converter and high-performance processor. Its features include 2-degree-of-freedom PID control, auto-tuning and realtime gain adjustment developed especially for testing systems. The combination of these features both heighten control precision and dramatically improve ease of use compared with existing controller models. A variety of tests can be easily performed by using the Windows-based GLUON software which offers comprehensive customization wizards.
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