@Article{icces.2023.09632,
AUTHOR = {Jiale Ji, Mengnan Zhang},
TITLE = {Uncovering the Intrinsic Deficiencies of Phase-Field Modeling for  Dynamic Fracture},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {27},
YEAR = {2023},
NUMBER = {2},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v27n2/54156},
ISSN = {1933-2815},
ABSTRACT = {The phase-field fracture (PFF) approach has achieved great triumphs in modeling quasi-static fracture. 
Nevertheless, its reliability in serving dynamic fractures still leaves something to be desired, such as the 
prediction of the limiting crack velocity. Using a pre-strained fracture configuration, we discovered a 
disturbing phenomenon that the crack limiting speed identified by the dynamic PFF model is not related to 
the specific material, which seriously deviates from the experimental observation. To ascertain the truth, 
we first ruled out the correlation between the limiting crack velocity on the phase-field characteristic scale 
and external loading. Afterward, by switching between different crack surface density functions and 
degradation functions, we reach an astonishing conclusion that the limiting crack velocity predicted by the 
dynamic PFF model relies on the model itself. This non-physical phenomenon signifies that the commonly 
used dynamic PFF model has inherent defects. From the perspective of classical linear elastic fracture 
mechanics (LEFM), the local wave velocity degradation can be responsible for the limiting crack velocity in 
the phase-field modeling of dynamic fracture.},
DOI = {10.32604/icces.2023.09632}
}