Monday  |  Executive CD  |  12:00 PM–12:20 PM

#19657, Dynamic Four-point Bend Fracture with a Modified Split Hopkinson (Kolsky) Bar

High-rate deformation and fracture behavior of aerospace-grade alloys, such as Ti-6Al-4V and Al 2024, are important for understanding their performance under extreme loading conditions. The objective of our study is to design an experimental setup and investigate the dynamic fracture behavior of these alloys using a modified Split Hopkinson Pressure Bar (SHPB) setup integrated with a four-point bend fixture to evaluate Single Edge Notched Bend (SENB) specimens with different triaxiality are tested to analyze their respective fracture strain. The experiments are conducted for high-strain-rate conditions, with Digital Image Correlation (DIC) used to measure local strain fields and ABAQUS simulations to determine stress triaxiality. Pulse shaping techniques are implemented to ensure dynamic equilibrium and minimize inertial effects. The results would demonstrate a dependence of fracture behavior on notch geometry and strain rate, providing valuable data for developing high-fidelity material models that predict failure across various geometries.

Aishvarya Joshi   Purdue University
Cody Kirk   Purdue University
Tyler Dillard   Purdue University
Matthew Kappes   Rolls-Royce Corporation
Zherui Martinez-Guo   Purdue University