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Title: Peridynamic Computational Model for Damage and Fracture.

Abstract

Abstract not provided.

Authors:
;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1148080
Report Number(s):
SAND2007-2874C
523254
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the 7th Biennial Tri-Laboratory Engineering Conference held May 7-10, 2007 in Albuquerque, NM.
Country of Publication:
United States
Language:
English

Citation Formats

Silling, Stewart Andrew, and Taylor, Paul Allen. Peridynamic Computational Model for Damage and Fracture.. United States: N. p., 2007. Web.
Silling, Stewart Andrew, & Taylor, Paul Allen. Peridynamic Computational Model for Damage and Fracture.. United States.
Silling, Stewart Andrew, and Taylor, Paul Allen. Tue . "Peridynamic Computational Model for Damage and Fracture.". United States. doi:. https://www.osti.gov/servlets/purl/1148080.
@article{osti_1148080,
title = {Peridynamic Computational Model for Damage and Fracture.},
author = {Silling, Stewart Andrew and Taylor, Paul Allen},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}

Conference:
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  • Abstract not provided.
  • The present study describes the basic principles of a general damage computational approach for laminates and shows its prediction possibilities for simulating the complete fracture phenomenon in different cases involving both inner-ply damage mechanisms and delamination. Damage refers to the more and less gradual development of microvoids and microcracks which lead to macrocracks and then to rupture. Brittle and progressive damage mechanisms are both present. In composite structures, it may be the main mechanical phenomenon. For such materials, damage is generally of a highly complex nature. There are not a single but several damage mechanisms. For example, inside of classicalmore » carbon-fiber laminates the main damage mechanisms are: fiber breaking: transverse micro-cracking: the debonding of adjacent layer (i.e. delamination). In order to predict the state of deterioration, it is now usual to use models with internal damage variables. This classical framework is insufficient to properly describe the deterioration of structures and has led to many difficulties such as mesh-dependency. In fact, a key-point is to define the scale at which the damage mechanisms are described. In the case of composite, a pragmatic and efficient method is to describe the material, especially the damage mechanisms, on an intermediate and preferential scale called a {open_quotes}meso-scale{close_quotes}. To get a mesomodel, one has to add one more property: the {open_quotes}meso{close_quotes} damage state is locally uniform within each elementary constituent. Then, for laminates, the damage state is taken uniform in the thickness of the elementary ply. So a mesomodeling is not scale invariant as in the classical models in continuum mechanics. In the case of laminates, to avoid all spurious behaviour, one also models delay damage which ensures another physical property: the damage rate is bounded.« less
  • The Multi-Mechanism Deformation (M-D) model for creep in rock salt has been used in three-dimensional computations for the Waste Isolation Pilot Plant (WIPP), a potential waste, repository. These computational studies are relied upon to make key predictions about long-term behavior of the repository. Recently, the M-D model was extended to include creep-induced damage. The extended model, the Multi-Mechanism Deformation Coupled Fracture (MDCF) model, is considerably more complicated than the M-D model and required a different technology from that of the M-D model for a computational implementation.