A discussion on failure criteria for ordinary state-based peridynamics. (December 2017)

• Record Type: Journal Article
• Authors: Dipasquale, Daniele; Sarego, Giulia; Zaccariotto, Mirco; Galvanetto, Ugo
• Is Part Of: Engineering fracture mechanics. Volume 186(2017)
• Page Start: 378
• Page End: 398
• Publication Date: 2017-12
• Subjects: State-based peridynamics -- Fracture criteria -- Dynamic crack propagation -- Mixed-mode loading; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2017.10.011
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: Mixed-mode dynamic crack propagation in brittle materials is studied with ordinary state-based peridynamics. An enhanced energy based failure criterion is proposed. A comparison of the enhanced criterion with others available in literature is performed. Both m-convergence and δ -convergence studies are discussed. Abstract: Peridynamics is a recently proposed nonlocal theory of continuum particularly suitable to describe fracture mechanics, since it employs an integral formulation which remains valid whenever discontinuities are present. In this paper, mixed-mode fracture cases are taken into consideration to numerically evaluate three failure criteria of the nonlocal interaction, called bond, between two material particles. These criteria are related to the maximum stretch of a bond or to the maximum energy that can be stored in a deformed bond. Their advantages and shortcomings are presented and discussed.