A rate-dependent damage mechanics model for predicting plasticity and ductile fracture behavior of sheet metals at high strain rates
Loading...
Access rights
openAccess
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal
View/Open full text file from the Research portal
Other link related to publication
View publication in the Research portal
View/Open full text file from the Research portal
Other link related to publication
Date
2024-08-05
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
29
Series
Engineering Fracture Mechanics, Volume 306
Abstract
Uniaxial tensile tests were performed on H340 steel sheets at different strain rates (10-4 to 103 s-1) and temperatures (–30 °C and 280 °C). Oscillation-free forces were measured during high-speed tests at strain rates of up to 1000 s-1 using specimens with different stress states. Material hardening curve, strain rate sensitivity, temperature effects, and Taylor-Quinney coefficient for adiabatic temperature calculations were determined in experiments. Digital image correlation (DIC) technique was employed to measure displacement, deformation, and local strain fields. Meanwhile, the temperature fields of specimen gauge section were measured with a high–speed thermal camera in the uniaxial tensile tests at various strain rates. Damage and fracture-related parameters were calibrated and validated using porosity measurements on SEM micrographs and in combination with finite element (FE) simulations. A rate– and temperature–dependent plasticity and damage mechanics model (e2MBW) was proposed and calibrated to predict the plasticity and fracture behavior of H340 under different loading speeds. The study demonstrated good agreement in the overall experimental and simulated force–displacement responses and local strain evolution across all fracture specimens at loading speeds from 0.005 mm/s to 10000 mm/s.Description
Publisher Copyright: © 2024 The Author(s)
Keywords
Damage mechanics model, Ductile fracture, Oscillation-free force, Strain rate, Stress state
Other note
Citation
Zeng, C, Fang, X, Habibi, N, Münstermann, S & Lian, J 2024, ' A rate-dependent damage mechanics model for predicting plasticity and ductile fracture behavior of sheet metals at high strain rates ', Engineering Fracture Mechanics, vol. 306, 110217 . https://doi.org/10.1016/j.engfracmech.2024.110217