Back to results
University of Illinois at Urbana-Champaign
A Numerical Study of Intergranular and Oxidation-Driven Fracture in an Elastic-Viscoplastic Material
Abstract
dc:descriptionThis study focuses on one mechanism that is believed to be important in the fatigue response of high-temperature superalloys: intergranular fracture driven by the infiltration and embrittlement of grain boundaries by oxygen. A novel space-time finite element model is developed to study this mechanism. The numerical model provides the basis for generic investigations of the kinetics of quasi-static crack growth along a brittle interface (such as an oxidized grain boundary) embedded in an elastic-viscoplastic material. Additional studies illuminate the complex interactions between stress-assisted grain-boundary diffusion, inelastic material response and grain-boundary cleavage.
Degree
thesis:*- Name thesis:degree_name
- Ph.D.
- Level thesis:degree_level
- Dissertation
- Discipline thesis:degree_discipline
- Theoretical and Applied Mechanics
- Grantor
- University of Illinois at Urbana-Champaign
- Year dc:date
- 2015
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Carranza, Fernando L.
- Contributors dc:contributor
-
- Haber, Robert B.
Subjects
dc:subject × 1Rights
- Language dc:language
- eng
Identifiers
dc:identifier.*- Identifier
- (MiAaPQ)AAI9812547
- OAI identifier oai:identifier
- oai:www.ideals.illinois.edu:2142/87765