Speaker
Mattia Utzeri
(Università Politecnica delle Marche)
Description
The strain rate- and stress state-dependent fracture behavior of high-strength AA6005-T6 aluminum sheet is characterized experimentally and numerically. Tests employed shear, hole tension, and notch tension specimens across strain rates of 10−310−3 to 500 s−1500 s−1. Positive strain rate sensitivity emerged in axial force responses for hole and notch tension specimens, with fracture limits increasing at higher rates. A temperature- and strain rate-dependent Johnson-Cook model captures flow stress dependence on equivalent plastic strain, strain rate, and temperature. An isotropic modified Hosford criterion accounts for the J3J3 effect on yield stress, while a strain rate-extended Mohr-Coulomb model predicts fracture initiation.
Primary authors
Mattia Utzeri
(Università Politecnica delle Marche)
Gianluca Chiappini
(Università eCampus)
Marco Rossi
(Università Politecnica delle Marche)
Marco Sasso
(Università Politecnica delle Marche)
