On the use of the Theory of Critical Distances to estimate the dynamic strength of notched 6063-T5 aluminium alloy
Journal Title: Frattura ed Integrità Strutturale - Year 2014, Vol 8, Issue 30
Abstract
In this paper the so-called Theory of Critical Distances is reformulated to make it suitable for estimating the strength of notched metals subjected to dynamic loading. The TCD takes as its starting point the assumption that engineering materials’ strength can accurately be predicted by directly post-processing the entire linear-elastic stress field acting on the material in the vicinity of the stress concentrator being assessed. In order to extend the used of the TCD to situations involving dynamic loading, the hypothesis is formed that the required critical distance (which is treated as a material property) varies as the loading rate increases. The accuracy and reliability of this novel reformulation of the TCD was checked against a number of experimental results generated by testing notched cylindrical bars of Al6063-T5. This validation exercise allowed us to prove that the TCD (applied in the form of the Point, Line, and Area Method) is capable of estimates falling within an error interval of ±20%. This result is very promising especially in light of the fact that such a design method can be used in situations of practical interest without the need for explicitly modelling the non-linear stress vs. strain dynamic behaviour of metals.
Authors and Affiliations
T. Yin, A. Tyas, O. Plekhov, L. Susmel
Keywords
Related Articles
- EP ID EP121645
- DOI -
- Views 32
- Downloads 0
L’infragilimento da idrogeno. Un caso di studio in una barra di comandi di un velivolo dell’aviazione generale.
La degradazione delle caratteristiche meccaniche di un materiale di impiego aeronautico ha pesanti ricadute sulla sicurezza del volo. Tale degradazione si può manifestare sia per l’effetto combinato tra l’ambiente...
Verifica a fatica dei giunti saldati sulla base di misure di deformazione locale
Lo studio della resistenza a fatica delle giunzioni saldate rappresenta un campo di prova molto interessante dal punto di vista scientifico, con ricadute pratiche altrettanto importanti. Si tratta in generale di fornire...
The influence of fibre orientation on the post-cracking tensile behaviour of steel fibre reinforced self-compacting concrete
Adding fibres to concrete provides several advantages, especially in terms of controlling the crack opening width and propagation after the cracking onset. However, distribution and orientation of the fibres towa...
Numerical modelling of ductile damage mechanics coupled with an unconventional plasticity model
Ductility in metals includes the material’s capability to tolerate plastic deformations before partial or total degradation of its mechanical properties. Modelling this parameter is important in structure and compo...
Field Load Acquisition and variable amplitude fatigue testing on maxi-scooter motorcycles
Aim of the present work was the instrumentation of a maxi scooter for the field collection of service loads acting on the scooter main components such as frame, fork, handlebar, rear frame and suspension. Service...