Glossary entry (derived from question below)
English term or phrase:
lifing
Polish translation:
analiza/metoda określania/wyznaczania (resztkowej) żywotności (zmęczeniowej) (turbiny)
Added to glossary by
Jacek Kloskowski
Oct 25, 2014 18:06
9 yrs ago
2 viewers *
English term
Poland
metallurgical engineer
Native in: Polish 
Works in: English to Polish, Polish to English
lifing
English to Polish
Tech/Engineering
Engineering (general)
Design, Operation, Materials and Integrity/ Lifing Issues (Both days = 0930-1730h)
Overview of design of hot gas path components: materials, coatings, cooling, damage mechanisms, lifing and deformation models.
Power augmentation by high fogging (wet compression) and evaporative cooling: technology, effects vs. ambient conditions, background considerations.
Specifically it concerns gas turbines, or rather materials used for hot parts of gas turbines. But I understand "lifing" may be applied to any materials in any plant. Does any Polish equivalent exist? Or simply "ocena trwałości"?
Overview of design of hot gas path components: materials, coatings, cooling, damage mechanisms, lifing and deformation models.
Power augmentation by high fogging (wet compression) and evaporative cooling: technology, effects vs. ambient conditions, background considerations.
Specifically it concerns gas turbines, or rather materials used for hot parts of gas turbines. But I understand "lifing" may be applied to any materials in any plant. Does any Polish equivalent exist? Or simply "ocena trwałości"?
Change log
Oct 28, 2014 23:49: Jacek Kloskowski Created KOG entry
Proposed translations
+1
4 hrs
Jacek Kloskowski
United States
United States
Native in English
&
Polish
United States
Law Economy Computing Defense Medical
Native in: Polish 
, English
Works in: English to Polish, Polish to English, Polish, and 1 more.
Related KudoZ points
:
124
Selected
analiza/metoda określania/wyznaczania (resztkowej) żywotności (zmęczeniowej) (turbiny)
In order to analyse the turbine blade life, the damage due to the combined
thermal and mechanical loads should be adequately accounted for. This is more
challenging when detailed component geometry is limited. Therefore, a
compromise between the level of geometric detail and the complexity of the
lifing method to be implemented would be necessary. This thesis therefore
focuses on how the life assessment of aero engine turbine blades can be done,
considering the balance between available design inputs and adequate level of
fidelity. Accordingly, the thesis contributes to developing a generic turbine blade
lifing method that is based on the engine thermodynamic cycle; as well as
integrating critical design/technological factors and operational parameters that
influence the aero engine blade life. To this end, thermo-mechanical fatigue was
identified as the critical damage phenomenon driving the life of the turbine
blade.
https://dspace.lib.cranfield.ac.uk/bitstream/1826/8405/1/Abu...
Wyznaczanie żywotności resztkowej
Cele określania resztkowej żywotności elementów turbin:
minimalizacja ryzyka eksploatacyjnego, w tym:
wyznaczenie bezpiecznych interwałów inspekcyjno-remontowych,
wyznaczenie terminu wymiany zużytych elementów,
optymalizacja parametrów eksploatacji,
weryfikacja uzyskanych wyników badań NDT,
określenie najbardziej niebezpiecznych miejsc
elementów pod kątem monitorowania ich stanu.
https://www.google.pl/url?sa=t&rct=j&q=&esrc=s&source=web&cd...
thermal and mechanical loads should be adequately accounted for. This is more
challenging when detailed component geometry is limited. Therefore, a
compromise between the level of geometric detail and the complexity of the
lifing method to be implemented would be necessary. This thesis therefore
focuses on how the life assessment of aero engine turbine blades can be done,
considering the balance between available design inputs and adequate level of
fidelity. Accordingly, the thesis contributes to developing a generic turbine blade
lifing method that is based on the engine thermodynamic cycle; as well as
integrating critical design/technological factors and operational parameters that
influence the aero engine blade life. To this end, thermo-mechanical fatigue was
identified as the critical damage phenomenon driving the life of the turbine
blade.
https://dspace.lib.cranfield.ac.uk/bitstream/1826/8405/1/Abu...
Wyznaczanie żywotności resztkowej
Cele określania resztkowej żywotności elementów turbin:
minimalizacja ryzyka eksploatacyjnego, w tym:
wyznaczenie bezpiecznych interwałów inspekcyjno-remontowych,
wyznaczenie terminu wymiany zużytych elementów,
optymalizacja parametrów eksploatacji,
weryfikacja uzyskanych wyników badań NDT,
określenie najbardziej niebezpiecznych miejsc
elementów pod kątem monitorowania ich stanu.
https://www.google.pl/url?sa=t&rct=j&q=&esrc=s&source=web&cd...
Peer comment(s):
| agree |
petrolhead
: Są dzę, że w tym kontekście "issues" odnoszą się do trwałości, a nie do metod jej analizowania/oceny. // Rzeczywiście o to chodzi. Dziękuję za lekcję :-)
6 hrs
|
|
Thank you, I still think "lifing" = "predicting (usable) life" || We all learn here every day, and that is what makes this forum so interesting :)
|
4 KudoZ points awarded for this answer.
Comment: "Dziękuję. Też tak to rozumiem, a Ty pomogłeś mi to wyrazić."
1 hr
petrolhead
Poland
Poland
Native in Polish
Specializes in field
Poland
Automotive tEXtPERT
Native in: Polish
Works in: English to Polish, German to Polish, Polish to English, and 2 more.
Related KudoZ points
:
242
czynniki obniżające trwałość
czynniki powodujące obniżenie trwałości
przyczyny obniżenia trwałości
jako odpowiednik "lifing issues"
przyczyny obniżenia trwałości
jako odpowiednik "lifing issues"
3 hrs
Frank Szmulowicz, Ph. D.
United States
United States
Native in English
&
Polish
Works in field
United States
On time, on target, on budget.
Native in: English , Polish
Works in: Polish to English, English to Polish, Russian to Polish, and 1 more.
Related KudoZ points
:
1816
problemy wpływające na cykl życiowy/długotrwałość eksploatacyjną
A couple of proposals based on the material below. I believe "lifing" has to do with estimating the usable life of components based on their properties.
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LIFING ISSUES. HOW LONG SHOULD A PRODUCT LAST OR WHAT SHOULD ITS. ESTIMATED/PREDICTED LIFE BE?
http://www.faside.com/Talk on May 13 SI paradigms-final blac...
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Lifing issues in hot gas path components of heavy duty gas turbines
Author
Yoshioka, Yomei · Saito, Daizo · Ito, Shoko
Published September 2011
Journal Materials at High Temperatures
See all Details
Abstract
Gas turbine hot-gas-path components, which include combustion liners, transition pieces, turbine nozzles and turbine buckets, are exposed to hot gases discharged from combustion systems and suffer from severe materials degradation and damage even in the early stage of operation. The severity of the damage and degradation increases with increasing inlet temperature and size of the gas turbines, which also increase the maintenance cost. 'Lifing' of components is, therefore, becoming a very critical issue. This paper describes several kinds of component damage and material degradation occurring in the 1,100°C- and 1,300°C-class heavy-duty gas turbines and then shows how we revised those component lives from the original design ones. Analytical-based assessment methods associated with condition-based assessment ones, some examples of assessment results, and component life extension technologies are also described.
http://scholar.qsensei.com/content/1qnnm1
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Module 1- Design, Operation, Materials and Integrity/ Lifing Issues
-Workshop: Case studies on damage and service life taken from GT
Lifing Methodologies / Available Tools
Analytical assessment methods
Assessment of defect– free components
Assessment of cracked components
Metallographic methods
Hardness measurement method
Strain measurement method
Methods based on temperature estimation
Post exposure (ex-service) creep rupture testing
Workshop and Worked Examples
Miniature specimen testing techniques
Creep Fatigue life consumption software
Advanced techniques
https://static.squarespace.com/static/5304e62de4b00674c06afd...
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An achievable near term goal is the integration of
computational structural models with probabilistic
microstructural lifing models to design gearbox
components with an ICME technology developed
by VEXTEC know as Virtual Life Management®
(VLM®) as shown in Figure 1. The primary goal of
the gear designer is to optimize the component for
lowest cost, lightest weight and longest life.
http://www.interfacialmultiphysics.com/uploads/2/3/7/9/23793...
Discussion
Lifing "has issues" because it is not easy to predict how long an element of the turbine (or jet engine which is also a turbine) can stay operational before before it must be replaced no matter how good it looks for the safety reasons.
There is a lot of scholarly articles dealing with various "lifing" methods and algorithms, both computational and statistical ones (based on historical tracking of components (down to the batch of steel a part was made from) that deal with this issue.
Many vendors (e.g. for example airlines) use their own algorithms for determining life expectancies and resulting from it "maintenance schedules".
Why it is so important? Because these components are usually very expensive. Changing them too early means much greater economic impact to the bottom line. Replacing them too late means a catastrophe, and possible demise of a company.
Hence, everybody dealing in that space (look up for example one of NASA's divisions/labs dealing solely with that subject and providing "lifing" services to third parties) has "lifing issues"
po polsku - szacowanie życia krytycznych komponentów
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.. if this is to happen, an accurate fatigue lifing methodology needs to be established. - http://goo.gl/tClhYA
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Fatigue lifing methodology to enhance the structural integrity of critical components in gas turbine engines. - http://www.gruppofrattura.it/ocs/index.php/esis/ECF10/paper/...
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