Description:
Reference #: 01422
The University of South Carolina is offering licensing opportunities for Mixed Mode-(I/III) Dynamic Fracture Toughness
Background:
Measuring the fracture toughness of materials under high load conditions has been a topic of interest in mechanical and material science communities in the last four decades. So far, no standard method can be used to estimate the dynamic fracture properties for engineering materials that are subjected to a critical load, such as nuclear pressure or airplanes.
Invention Description:
This invention is a unique method to measure the fracture toughness of materials with a different loading rate without an inertia effect. cylindrical aluminum alloy specimens with a V-notch spiral crack on the surface at spiral angles are subjected to dynamic torsional load using a torsional Hopkinson bar apparatus. A 3D digital image correlation is performed to measure the full-field displacement around the crack edges and used to estimate the time at which the crack initiation has started. The dynamic stress intensity factors are extracted numerically based on the dynamic interaction integral method. This method uses one configuration specimen to measure a different type of dynamic fracture mode.
Potential Applications:
A new method to measure the fracture properties of engineering material at high loading rate.
Advantages and Benefits:
This method uses one configuration specimen to measure a different type of dynamic fracture mode. The accuracy of the result is higher than the classical methods, since the new method uses a unique load direction application.