The Effect of Environment on Both the Stress Corrosion and Fracture Toughness Reduction
Project goals
Annual losses caused by metal corrosion in CR are estimated up to 3,5 % of GDP (ca 120 bil. CZK). Very dangerous type of damage to construction caused by corrosion, in terms of its reliability, is a stress corrosion (SC) cracking. SC cracking is initiated by coaction of corrosive aggressive environment and mechanical stress. The result of this process is damage to construction integrity by cracks. Fracture mechanics is the basic tool for evaluating the safety of such damaged construction. Specifically,it concerns the fracture toughness (FT), which describes the resistance against fracture. The crucial question of the effect of SC crack on FT of material is not completely explained so far. The basis of the project is to carry out, with the use of experimental work and fracture-mechanical evaluation, the quantitative evaluation of the effect of aggressive environment on the change of FT of material. The aim of this project is to evaluate, both qualitatively and quantitatively, the level of dangerousness of prediction of fracture parameters for a structure with SC crack, as for as the prediction comes from FT determined on specimens with fatigue cracks.
Keywords
lomová houževnatost materiálukorozní agresivní mediumkorozně napěťová trhlina
Public support
Provider
Czech Science Foundation
Programme
Post-graduate (doctorate) grants
Call for proposals
Postdoktorandské granty 10 (SGA02010GA1PD)
Main participants
—
Contest type
VS - Public tender
Contract ID
P105/10/P555
Alternative language
Project name in Czech
Vliv prostředí na korozi pod napětím a snížení lomové houževnatosti
Annotation in Czech
Cílem projektu je kvantitativní posouzení vlivu agresivního prostředí při procesu koroze pod napětím na změnu lomové houževnatosti materiálu. Na základě toho lze posoudit míru nebezpečnosti predikce lomových parametrů u konstrukce s korozně-napěťovou trhlinou oproti predikci pro únavové trhliny.
Scientific branches
R&D category
ZV - Basic research
CEP classification - main branch
JL - Fatigue and fracture mechanics
CEP - secondary branch
JM - Structural engineering
CEP - another secondary branch
JK - Corrosion and material surfaces
20102 - Construction engineering, Municipal and structural engineering
20306 - Audio engineering, reliability analysis
20506 - Coating and films
Completed project evaluation
Provider evaluation
U - Uspěl podle zadání (s publikovanými či patentovanými výsledky atd.)
Project results evaluation
The project gone according to plan both in terms of expertise and in terms of disbursement of funds.
Solution timeline
Realization period - beginning
Jan 1, 2010
Realization period - end
Dec 31, 2011
Project status
U - Finished project
Latest support payment
Apr 16, 2011
Data delivery to CEP
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data delivery code
CEP12-GA0-GP-U/03:3
Data delivery date
May 2, 2016
Finance
Total approved costs
350 thou. CZK
Public financial support
350 thou. CZK
Other public sources
0 thou. CZK
Non public and foreign sources
0 thou. CZK
Basic information
Recognised costs
350 CZK thou.
Public support
350 CZK thou.
100%
Provider
Czech Science Foundation
CEP
JL - Fatigue and fracture mechanics
Solution period
01. 01. 2010 - 31. 12. 2011