LOCALIZATION ANALYSIS OF DAMAGE FOR ONE-DIMENSIONAL PERIDYNAMIC MODEL

• Main Authors: Karel Mikeš, Milan Jirásek, Jan Zeman, Ondřej Rokoš, Ron H. J. Peerlings
• Format: Article
• Language: English
• Published: CTU Central Library 2021-04-01
• Series: Acta Polytechnica CTU Proceedings
• Subjects: damage; localization; nonlocal continuum; peridynamics.
• Online Access: https://ojs.cvut.cz/ojs/index.php/APP/article/view/7200

Peridynamics is a recently developed extension of continuum mechanics, which replaces the traditional concept of stress by force interactions between material points at a finite distance. The peridynamic continuum is thus intrinsically nonlocal. In this contribution, a bond-based peridynamic model with elastic-brittle interactions is considered and the critical strain is defined for each bond as a function of its length. Various forms of length functions are employed to achieve a variety of macroscopic responses. A detailed study of three different localization mechanisms is performed for a one-dimensional periodic unit cell. Furthermore, a convergence study of the adopted finite element discretization of the peridynamic model is provided and an effective event-driven numerical algorithm is described.