High magnification crack-tip field characterisation under biaxial conditions
Journal Title: Frattura ed Integrità Strutturale - Year 2013, Vol 7, Issue 25
Abstract
This work presents a novel methodology for characterising fatigue cracks under biaxial conditions. The methodology uses high magnification Digital Image Correlation (DIC) technique for measuring displacement and strain crack-tip fields. By applying micro-speckle pattern on the metal surface it is possible to achieve high magnification for DIC technique. The speckles were created by electro-spray technique. The validity of this novel technique is demonstrated by direct comparison with standard extensometer measurements, under tension-compression and torsion conditions. In order to image the correct region, the notch effect on the fatigue life was also evaluated.
Authors and Affiliations
B. Moreno, P. Lopez-Crespo, J. Zapatero
Keywords
Related Articles
- EP ID EP98605
- DOI 10.3221/IGF-ESIS.25.21
- Views 82
- Downloads 0
Analysis of time-dependent reliability of degenerated reinforced concrete structure
Durability deterioration of structure is a highly random process. The maintenance of degenerated structure involves the calculation of the reliability of time-dependent structure. This study introduced reinforced&...
Analysis of the causes of failure in 5Cr-1Mo pipes mounted in a preheating furnace
The oxidation resistance of iron-based alloys depends on the formation of thin protective films consisting of reaction products between the alloys and the ambient atmosphere. The high corrosion resistance of Fe-Cr-...
Specimen thickness effect on elastic-plastic constraint parameter A
Three-dimensional elastic-plastic problems for a power-law hardening material are solved using the finite element method. Distributions of the J-integral and constraint parameter A along the crack front for varyi...
Interpreting experimental fracture toughness results of quasi-brittle natural materials through multi-parameter approaches
Natural stones like marbles are often employed as façade panels to externally cover buildings. These natural materials tend to exhibit a quasi-brittle nonlinear fracture behaviour which, conversely to concrete co...
A critical review of fracture mechanics as a tool for multiaxial fatigue life prediction of plastics1
Plastics belong to the most complex and probably least understood engineering materials of today. Combining the best aspects of design, mechanical properties and manufacturing, the structural integrity of plastic...