View source for Peel Force – Fracture Path Diagram

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<span style="font-size:1.2em;font-weight:bold;">Peel force–fracture path diagram, peel force–elongation diagram”</span>

or simplified in short: '''“peel curve”'''
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==Registration of peel curves==

The peel force–fracture path diagram (peel curve) refers to the force–elongation diagram ('''Fig. 1''') recorded during the [[Peel Process|peel process]] in a peel test ([[T-Peel Test|T-peel test]] or [[Fixed-arm Peel Test|fixed-arm peel test]]). The peel force is usually determined from the peel force–fracture path diagram as the mean value of the forces measured between 20 % and 80 % of the fracture path ''l''<sub>B</sub>.

[[File:Peel_Force_Fracture_Diagram_Fig-1.jpg|300px]]
{| 
|- valign="top"
|width="50px"|'''Fig. 1''': 
|width="600px" |Peel force–fracture path diagram (peel curve) from the peel test, ''F''<sub>peel</sub> – peel force; ''l''<sub>B</sub> – fracture path; ''E''<sub>G</sub> – total peel energy
|}


==Material example PE-LD/iPB-1==

Using the example of the peel system low-density polyethylene blended with isotactic polybutene-1 ([[Plastics – Symbols and Abbreviated Terms|abbreviation]]: PE-LD/iPB-1), the peel force–fracture path diagrams (peel curves) recorded during the T-peel test for different iPB-1 contents of 6, 10, and 20 m.-% are shown in '''Fig. 2'''. The peel curves shown typically exhibit two local maxima, the presence of which is due to the concave cross-section of the [[Sealed Seam|sealed seam]]. Furthermore, the plateau range used to determine the [[Measured Variable|measured variable]] [[Peel Force|peel force]] is clearly visible in the peel curves. The force level of this plateau range and also the fracture path ''l''<sub>B</sub> are reduced with increasing iPB-1 mass content.

[[File:Peel_Force_Fracture_Diagram_Fig-2.jpg|300px]]
{| 
|- valign="top"
|width="50px"|'''Fig. 2''': 
|width="600px" |Representation of selected peel force–fracture path diagrams
|}


==See also==

* [[Peel Force|Peel force]]
* [[T-Peel Test|T-Peel test]]
* [[Fixed-arm Peel Test|Fixed-arm peel test]]
* [[Peel Angle|Peel angle]]
* [[Peel Properties of Peel Systems|Peel properties of peel systems]]

==References==

* [[Nase, Michael|Nase, M.]], Langer, B., [[Grellmann,_Wolfgang|Grellmann, W.]]: Bruchmechanische Kennwertermittlung im T-Peeltest und im Fixed-Arm Peeltest. In: Frenz, H., [https://www.researchgate.net/profile/Wolfgang-Grellmann Grellmann, W.] (Eds.): 26. Tagung Werkstoffprüfung „Herausforderung neuer Werkstoffe an die Forschung und Werkstoffprüfung“, Berlin (2008) Proceedings pp. 223–228, (ISBN 978-3-00-026399-6; see [[AMK-Library]] under A 10) [https://www.polymerservice-merseburg.de/fileadmin/inhalte/psm/veroeffentlichungen/Bruchmechanische_Kennwertermittlung_im_T_Peelttest_WP2008.pdf Download as pdf]
* Nase, M., Langer, B., [https://de.wikipedia.org/wiki/Wolfgang_Grellmann Grellmann, W.]: Fracture Mechanics on Polyethylene/polybutene-1 Peel Films. Polymer Testing 27 (2008) 1017–1025; [https://doi.org/10.1016/j.polymertesting.2008.09.002 https://doi.org/10.1016/j.polymertesting.2008.09.002]
* Nase, M.: Zusammenhang zwischen Herstellungsbedingungen, übermolekularer Struktur und Eigenschaften von Peelfolien. Shaker Publishing (2010) (ISBN 978-3-8322-9099-3; see [[AMK-Library]] under B 1-17)

[[Category:Peel Test]]