Non-Linear Fracture Toughness

Non-Linear Fracture Toughness (ASTM E399, E1820, E1921, etc.)

The Non-Linear Fracture Toughness software was written specifically for fracture toughness testing and analysis. This software is used for performing both linear-elastic fracture mechanics tests such as ASTM E399 and non-linear tests such as ASTM E1820. The firmware running on the ADwin includes high-priority processes for waveform generation, control and data acquisition. PC software that integrates with the ADwin in real time performs the analysis required to determine the crack length and real-time calculation of the K and J parameters.

Software Features

The ability to perform linear-elastic, i.e., ASTM E399, or nonlinear, i.e., ASTM E1820, fracture toughness tests
Support for many standard specimen geometries, including C(T), M(T), SEN(T), SEN(B), and user-defined K solutions
Compliance and DC potential difference methods of monitoring crack length
Simultaneous crack length monitoring with multi-monitoring feature
User-specified control and data acquisition rates for a wide range of test conditions
Precise position control and high-precision data acquisition
Real-time display of load displacement, J-∆a and amplified unloading slopes
Real-time evaluation of unloading slopes and stable crack growth
The ability to perform testing with unloads at a fixed load drop or as a percentage of maximum load
Real-time calculation of fracture toughness data and parameters
Complete automated control and limit functions
Storage of all force and displacement parameters for subsequent analysis
Auxiliary channel storage available on up to 2 additional channels
Versatile analysis software, including playback tool for slope analysis
Support of English and SI units