Fatigue crack growth in disordered media

• Grant number: 11/23256-5
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: April 01, 2012
• End date: April 30, 2015
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Andre de Pinho Vieira
• Grantee: Maycon de Sousa Araújo
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The present project aims at investigating the effects of disorder, invariably present in real systems, on crack propagation in media subject to cyclic-load fatigue. Based on recent work [A. P. Vieira, J. S. Andrade, H. J. Herrmann, Phys. Rev. Lett. 100, 195503 (2008)], it is possible to start from a micrometric approach in order to analyze the relation between a local damage-accumulation rule in the material and the phenomenological Paris law, which establishes that the crack velocity is proportional to a power of the change in the stress-intensity factor, and is widely used in engineering practice to estimate the lifetime of parts working under fatigue. The damage-accumulation rule is inspired by ideas of self-similarity, and crack propagation is studied via numerical approaches, combined with analytical results.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

ARAÚJO, Maycon de Sousa. Fatigue crack growth in disordered media under ciclic load.. 2016. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Física (IF/SBI) São Paulo.