English translation: stress/stretch ratio curves

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
 German term or phrase: Spannungs/Verstreckgradkurven English translation: stress/stretch ratio curves Entered by:

 23:25 Jan 31, 2003
German to English translations [PRO]
Tech/Engineering - Materials (Plastics, Ceramics, etc.) / plastic
 German term or phrase: Spannungs/Verstrecksgradkurven Text about the stretch-blow moulding technology for plastic bottles Bild 1 zeigt die gemessenen Spannungs/Verstreckgradkurven bei der jeweils höchsten Dehngeschwindigkeit von 10,0 s.
 Local time: 18:47
 stress/stretch ratio curves Explanation:(Asterisks put in by me) "Because of the **stresses involved in stretch-blow molding** PET, flat panels often warp in uncontrollable ways. ... A matching neck finish and part weight are necessary but not sufficient - the preform dimensions must be correct for the bottle dimensions and resin **stretch ratios**." Verstrecken = stretching / drawing (from my plastics processing dictionary)
Selected response from:

John Jory
Germany
Local time: 18:47
 Thank-you. I had not found that site. You also gave a correction on neck ring, Geoffrey Steinherz4 KudoZ points were awarded for this answer

4stress/stretch ratio curves
 John Jory
4stress ratio / draw ratio curves
 EdithK
2stress curve?
 Kim Metzger

23 mins   confidence:
stress curve?

Explanation:
I think stress curve would work for Spannungskurve. I don't know about Verstreckungskurve but maybe stretching curve.

Residual stresses are mechanical stress in the injection moulded part without external load exerted to the part. They are due to the differences in the cooling of the part and orientation of the polymer chains. In the picture is typical stresses in different wall layers. The stress curve is parabolic and as can be concluded the greatest stresses are in the surface of the moulded part. The stress inside the part is tensile stress and in the layer it is compression stress.

Reference: http://www.tut.fi/plastics/tyreschool/tuula/Ruiskuvalu/engla...
 Kim MetzgerMexicoLocal time: 11:47Works in fieldNative speaker of: EnglishPRO pts in category: 300

7 hrs   confidence:
stress ratio / draw ratio curves

Explanation:
is used in stretch-blow moulding

the second term is in Kucera, the first - umpteen hits on google.

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Note added at 2003-02-01 07:09:29 (GMT)
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www.pras.com/pras/materials_and_processes/ processes/vf_details.asp - 25k

gives the draw ratio

 EdithKSwitzerlandLocal time: 18:47Works in fieldNative speaker of: German, EnglishPRO pts in category: 88

9 hrs   confidence:
stress/stretch ratio curves

Explanation:
(Asterisks put in by me)

"Because of the **stresses involved in stretch-blow molding** PET, flat panels often warp in uncontrollable ways.

... A matching neck finish and part weight are necessary but not sufficient - the preform dimensions must be correct for the bottle dimensions and resin **stretch ratios**."

Verstrecken = stretching / drawing
(from my plastics processing dictionary)

 John JoryGermanyLocal time: 18:47Works in fieldNative speaker of: German, EnglishPRO pts in category: 61
 Thank-you. I had not found that site. You also gave a correction on neck ring, Geoffrey Steinherz

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