| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Shterenlikht, Anton
Alfsen og Gunderson (Norway)
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2019Fatigue of thin periodic triangular lattice platescitations
- 2019Fracture of three-dimensional lattices manufactured by selective laser meltingcitations
- 2018Modelling fracture in heterogeneous materials on HPC systems using a hybrid MPI/Fortran coarray multi-scale CAFE frameworkcitations
- 2018Multiscale CAFE for fracture in heterogeneous materials under dynamic loading conditions
- 2018Fabrication of micro-scale fracture specimens for nuclear applications by direct laser writing
- 2017Multi-scale CAFE framework for simulating fracture in heterogeneous materials implemented in fortran co-arrays and MPIcitations
- 2017Measurement of assembly stress in composite structures using the deep-hole drilling techniquecitations
- 2017Fortran coarray/MPIMulti-scale CAFE for fracture in heterogeneous materialscitations
- 2016On stability of a new side cut destructive method for measuring non-uniform residual stress in thin platescitations
- 2015Advances in the deep hole drilling technique for the residual stress measurement in composite laminates
- 2015Advances in the deep hole drilling technique for the residual stress measurement in composite laminates
- 2015Measurement of in-plane residual stresses in an AS4/8552 composite laminate using the deep-hole drilling method
- 2015Measurement of in-plane residual stresses in an AS4/8552 composite laminate using the deep-hole drilling method
- 2014Prediction of crack propagation and arrest in X100 natural gas transmission pipelines with a strain rate dependent damage model (SRDD). Part 2citations
- 2013Prediction of crack propagation and arrest in X100 natural gas transmission pipelines with the strain rate dependent damage model (SRDD). Part 1citations
- 2013The Role of Grain Size on Deformation of 316H Austenitic Stainless Steel
- 2010The evolution of crack-tip stresses during a fatigue overload eventcitations
- 2010Influence of gas depressurisation on the ductile fracture propagation of X80 and X100 steel pipelines
- 2006The CAFE model of fracture - application to a TMCR steelcitations
- 2006A general method for coupling microstructural response with structural performancecitations
- 2005Modeling the ductile-brittle transition behavior in thermomechanically controlled rolled steelscitations
- 2005Assessment of an instrumented Charpy impact machinecitations
- 20043D CAFE modelling of transitional ductile fracture in steels
Places of action
| Organizations | Location | People |
|---|
article
The evolution of crack-tip stresses during a fatigue overload event
Abstract
The mechanisms responsible for the transient retardation or acceleration of fatigue crack growth subsequent to overloading are a matter of intense debate. Plasticity-induced closure and residual stresses have often been invoked to explain these phenomena, but closure mechanisms are disputed, especially under conditions approximating to generalised plane strain. In this paper we exploit synchrotron radiation to report very high spatial resolution two-dimensional elastic strain and stress maps at maximum and minimum loading measured under plane strain during a normal fatigue cycle, as well as during and after a 100% overload event, in ultra-fine grained AA5091 aluminium alloy. These observations provide direct evidence of the material stress state in the vicinity of the crack-tip in thick samples. Significant compressive residual stresses were found both in front of and behind the crack-tip immediately following the overload event. The effective stress intensity at the crack-tip was determined directly from the local stress field measured deep within the bulk (plane strain) by comparison with linear elastic fracture mechanical theory. This agrees well with that nominally applied at maximum load and 100% overload. After overload, however, the stress fields were not well described by classical K fields due to closure-related residual stresses. Little evidence of overload closure was observed sometime after the overload event, in our case possibly because the overload plastic zone was very small. Crown Copyright © 2010 Published by Elsevier Ltd. on behalf of Acta Materialia Inc. All rights reserved.