2017/04/26 by Nikolai Gorbushin, Gennaro Vitucci, Gorbushin, Nikolai +5
Engineering · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Numerical methods in engineering #Structural Response to Dynamic Loads #Ultrasonics and Acoustic Wave Propagation
paper · pdf · doi:10.48550/arxiv.1704.08222
openalex publication_date 2017/04/26 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/28
The extent to which time-dependent fracture criteria affect the dynamic\nbehavior of fracture in a discrete structure is discussed in this work. The\nsimplest case of a semi-infinite isotropic chain of oscillators has been\nstudied. Two history-dependent criteria are compared to the classical one of\nthreshold elongation for linear bonds. The results show that steady-state\nregimes can be reached in the low subsonic crack speed range where it is\nimpossible according to the classical criterion. Repercussions in terms of load\nand crack opening versus velocity are explained in detail. A strong qualitative\ninfluence of history-dependent criteria is observed at low subsonic crack\nvelocities, especially in relation to achievable steady-state propagation\nregimes.\n