initialisation en fond de filets
English translation: initiation at the thread roots
| 16:54 Oct 2, 2009 |
| French to English translations [PRO] Tech/Engineering - Engineering: Industrial / Valves | |||||||
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|  Selected response from: Bourth (X) Local time: 22:49 | ||||||
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| 4 +3 | initiation at the thread roots |
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| 2 +1 | began around the base of the weld joints |
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| 2 | initiated by permeation or seepage |
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Answers
8 mins confidence: 
initiated by permeation or seepage Explanation: is how you say this in dam structures....water seeping or trickling through and beginning to damage the structure....just an idea... -------------------------------------------------- Note added at 44 mins (2009-10-02 17:38:08 GMT) -------------------------------------------------- this sounds perfectly reasonable to me (being an engineer)...let me try to explain....if the cracks (and the water/liquid seeping through them under pressure), reach specific spots with irregular shapes, where they come out or become apparent under an angle that is particularly damaging (depending on the area and the already present constraints, this can vary!), they can be desastrous for the part...if the situation / angle / pressure is particularly annoying, this pressure of the liquid can crack open the part in question, once the crack is fully developed and the pressure can exert it´s effect on the two halves of the part in question....hope this explains some of it! -------------------------------------------------- Note added at 45 mins (2009-10-02 17:39:43 GMT) -------------------------------------------------- so it starts with something quite harmless, and if one is out of luck and the cracks reach an annoying spot, the structure of the part can be destroyed.... |
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1 hr confidence: peer agreement (net): +1
peer agreement (net): +1began around the base of the weld joints Explanation: Far from certain, but the welded area is one that is under stress and if it is not perfect then seapage can occur. You mention 'angles vifs', i.e. a sharp corner which is more prone to damage due to the water pressure. |
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2 hrs confidence: peer agreement (net): +3
peer agreement (net): +3initiation at the thread roots Explanation: Thread roots are a place of predilection for stress corrosion cracking. If not specially rounded, the "V notch" between threads has a sharp point from which cracking can easily start. STRESS-CORROSION CRACKING initiated from the THREAD BOTTOM. Localized pits and branching cracks are visible. Magnification: 1209 ... www.springerlink.com/index/V44WL6864632130M.pdf Also, the orientations of STRESS CORROSION CRACKS within THREAD ROOTS can be correlated with the locations of maximum stress http://www.osti.gov/bridge/servlets/purl/837670-jCU577/nativ... STRESS CORROSION CRACKING (SCC) behavior of cut (machined) vice thread rolled ... beneficial residual stresses in CRITICALLY STRESSED THREAD ROOT REGION, ... adsabs.harvard.edu/abs/1993STIN...9422001K and promotion of SCC AT THE THREAD ROOT above the nut. ... in cross-sectional area resulting from the presence of peripheral stress corrosion cracks. ... books.google.com/books?isbn=0849323142... A photomicrograph of the 11th THREAD ROOT, showing FISSURES TYPICAL OF STRESS CORROSION CRACKING is shown in Figure 9. Al- ... doi.wiley.com/10.1002/jbm.820080305 THREAD ROOT The THREAD ROOT IS THE BOTTOM OF THE THREAD, on external threads the roots are usually rounded so that fatigue performance is improved. http://www.boltscience.com/pages/glossary.htm Glossary - 16 THREAD ROOT - THE BOTTOM SURFACE JOINING THE SIDES OF TWO ADJACENT THREADS... www.scribd.com/.../Glossary-US-Armys-Fundamentals-of-Machin... |
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