Dynamic failure simulation of quasi‐brittle material in dual particle dynamics
Abstract
The feasibility of simulating dynamic fracture in quasi‐brittle material using a dual particle computational method with a smeared‐crack representation of material failure is explored. The computational approach utilized is dual particle dynamics, which incorporates a moving least squares interpolation of field variables between two sets of particles that discretize the spatial domain, and a Lagrangian description of the moving least squares weight function. Material failure is represented by an inelastic continuum strain contribution obtained from smearing the effect of a cohesive failure model over a discrete volume of material. A three‐dimensional simulation of the initiation and development of a dynamic mode I failure is performed for the case of approximate plane wave propagation. Post failure wave interaction with the resulting global failure surface replicates the behavior of a stress‐free boundary condition. The computational material failure approach is applied to problems of spalling in split Hopkinson pressure bar tests. Experimental failure trends are reproduced successfully.Copyright © 2012 John Wiley & Sons, Ltd.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 12, 2012
- Source ID
- 10.1002/nme.4327
Entities
People
- J.j. Sanchez
- P.w. Randles
Organizations
- Defense Threat Reduction Agency
- Pennsylvania State University