Criterion for Imminent Failure During Loading—Discrete Element Method Analysis

Frontiers in Physics

Wojciech Dȩbski¹  Alex Hansen²  Srutarshi Pradhan² 

[1] Department of Theoretical Geophysics, Institute of Geophysics Polish Academy of Sciences (PAS), Warsaw, Poland;PoreLab, Department of Physics, Norwegian University of Science and Technology (NTNU), Trondheim, Norway;

关键词: Fiber Bundle Model;    Discrete Element Method;    Bayesian error estimation;    tensional fracturing;    energy variation;    collapse point;   

DOI  :  10.3389/fphy.2021.675309

来源: Frontiers

【 摘 要 】

It has recently been reported that the equal load sharing fiber bundle model predicts the rate of change of the elastic energy stored in the bundle reaches its maximum before catastrophic failure occurs, making it a possible predictor for imminent collapse. The equal load sharing fiber bundle model does not contain central mechanisms that often play an important role in failure processes, such as localization. Thus, there is an obvious question whether a similar phenomenon is observed in more realistic systems. We address this question using the discrete element method to simulate breaking of a thin tissue subjected to a stretching load. Our simulations confirm that for a class of virtual materials which respond to stretching with a well-pronounced peak in force, its derivative and elastic energy we always observe an existence of the maximum of the elastic energy change rate prior to maximum loading force. Moreover, we find that the amount of energy released at failure is related to the maximum of the elastic energy absorption rate.

【 授权许可】

CC BY