Oluschinski: Created page with "{{Language_sel|LANG=ger|ARTIKEL=Instrumentierter Kerbschlagzugversuch}} {{PSM_Infobox}} Instrumented tensile impact test (ITIT) FORCETOC ==General== The instrumented tensile-impact test (ITIT) is carried out with the aim of determining fracture mechanics values for films and elastomers, as well as for thermoplastics. ==Validity of ITIT== By Electronic Instrumentatio..."

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Created page with "{{Language_sel|LANG=ger|ARTIKEL=Instrumentierter Kerbschlagzugversuch}} {{PSM_Infobox}} Instrumented tensile impact test (ITIT) __FORCETOC__ ==General== The instrumented tensile-impact test (ITIT) is carried out with the aim of determining fracture mechanics values for films and elastomers, as well as for thermoplastics. ==Validity of ITIT== By Electronic Instrumentatio..."

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{{Language_sel|LANG=ger|ARTIKEL=Instrumentierter Kerbschlagzugversuch}}
{{PSM_Infobox}}
Instrumented tensile impact test (ITIT)
__FORCETOC__

==General==

The instrumented tensile-impact test (ITIT) is carried out with the aim of determining fracture mechanics values for films and [[Elastomers|elastomers]], as well as for [[Thermoplastic Material|thermoplastics]].

==Validity of ITIT==

By [[Electronic Instrumentation|electronic instrumentation]] impact-tension pendulum impact test set-ups (see: [[Impact Loading Pendulum Impact Tester|impact loading pendulum impact tester]]), i.e. by fitting [[Strain Gauge|strain gauges]] or a [[Piezoelectric Force Transducer|piezoelectric force transducer]] to record the load--time curve, a better understanding of the [[Toughness|toughness properties]] is achieved. It is possible to define and evaluate different energy contributions to the total deformation, as well as to determine [[Measured Variable|measured variables]] such as the maximum load ''F''max and the corresponding deformation ''l''max. In the context of material comparison or material optimisation, these measured variables provide important insights into the interpretation of the determined [[Material Value|characteristic values]] for [[Crack Toughness|crack toughness]].

==Application of the method==

Test specimens with metal-bladed notches on both sides ([[DENT-Specimen|DENT-specimens]], see '''Fig. 1''') are used for the investigations.

[[File:IKZV.jpg|250px]]
{|
|- valign="top"
|width="50px"|'''Fig. 1''':
|width="600px" |Fig. 1: Double-sided notched [[Specimen|test specimen]] for carrying out the [[Notched Tensile Impact Test|notched tensile impact test]]
|}

The selection of the pendulum hammer to be used – and thus the maximum energy delivered – depends on the properties (see: [[Fracture Mechanical Testing|fracture mechanical testing]]) of the material under investigation. In some cases, the [[Impact Loading Pendulum Impact Tester|pendulum impact testers]] also feature additional units for precisely adjusting the angle of fall and, consequently, the pendulum hammer velocity. This means that, in this case, the fracture mechanics properties of [[Plastics|plastics]] can also be characterised as a function of the loading speed (see: [[Test Speed|test speed]]). The test specimens have the dimensions ''L'' ≥ 64 mm, ''W'' = 10 mm and a total notch depth ''a'' = 2 mm. The clamped length ''l''0 is 30 mm. The test setup is shown in '''Figs. 2''' and '''3''' below.

[[File:InstrTensileImpactTest-Fig2.jpg|250px]]
{|
|- valign="top"
|width="50px"|'''Fig. 2''':
|width="600px" |Schematic diagram of the test setup for the instrumented tensile-impact test (top view)
|}

[[File:IKZV_Foto_Einspannung.jpg|300px]]
{|
|- valign="top"
|width="50px"|'''Fig. 3''':
|width="600px" |Test procedure for the instrumented tensile-impact test (side view)
|}

==Specification of material values==

Based on the results of the instrumented tensile- impact test, fracture mechanics [[Material Value|values]] are calculated from the evaluated load–extension diagrams for the [[Toughness|toughness characterisation]]. These toughness values are primarily ''J''d values, which quantify the resistance of the material under investigation to the propagation of an unstable [[Crack|crack]]. One advantage of these characteristic values compared with the notched tensile-impact toughness ''a''tN determined in the [[Notched Tensile Impact Test|conventional tensile-impact test]] is, for example, their particular sensitivity to microstructure.

==See also==

* [[Fracture Mechanical Testing|Fracture mechanical testing]]
* [[Electronic Instrumentation|Electronic instrumentation]]
* [[MPK-Procedure MPK-ITIT]]
* [[Instrumented Charpy Impact Test|Instrumented Charpy impact test]]
* [[Impact Loading Pendulum Impact Tester|Impact loading pendulum impact tester]]
* [[Impact Loading Plastics|Impact loading plastics]]
* [[Toughness]]

==References==

* [[Reincke,_Katrin|Reincke, K.]]: Testing of polymeric films. In: [[Grellmann,_Wolfgang|Grellmann, W.]], [https://de.wikipedia.org/wiki/Sabine_Seidler Seidler, S.] (Eds.): Polymer Testing. Carl Hanser Munich (2022). 3rd. Edition, p. 643–678 (ISBN 978-1-56990-806-8; e-Book ISBN 978-1-56990-807-5; ePub ISBN 978-1-56990-802-2; see [[AMK-Library]] under A 22)
* [[MPK-Procedure MPK-ITIT]] (2012-06): Testing of Plastics – Instrumented Tensile-Impact Test (ITIT): Procedure for Determining the Crack Resistance Behaviour Using the Instrumented Tensile-Impact Test
* [https://www.researchgate.net/profile/Wolfgang-Grellmann Grellmann, W.]: Instrumented tensile-impact testing for product evaluation. In: [https://de.wikipedia.org/wiki/Wolfgang_Grellmann Grellmann, W.], [https://de.wikipedia.org/wiki/Sabine_Seidler Seidler, S.] (Eds.): Polymer Testing. Carl Hanser, Munich (2022) 3rd Edition, pp. 272–279 (ISBN 978-1-56990-806-8; see [[AMK-Library]] under A 22)
* Reincke, K.: Bruchmechanische Bewertung von gefüllten und ungefüllten Elastomerwerkstoffe. Mensch & Buch Publishing, Berlin (2005), (ISBN 978-3-86664-021-4; see [[AMK-Library]] under B 1-13)
* Reincke, K., Grellmann, W.: Elastomers. Impact loading. In: Grellmann, W., Seidler, S.: Mechanical and Thermomechanical Properties of Polymers. Landolt-Börnstein. Volume VIII/6A3, Springer, Berlin (2014) pp. 502–509, (ISBN 978-3-642-55165-9; see [[AMK-Library]] under A 16)
* Reincke, K., Grellmann, W.: Approaches to characterise the mechanical properties of films and elastomers. In: Grellmann, W., Langer, B.: Deformation and Fracture Behaviour of Polymer Materials. Springer Series in Materials Science 247, Springer, Berlin Heidelberg (2017) 225–336 (ISBN 978-3-319-41877-3; e-Book: ISBN 978-3-319-41879-7; see [[AMK-Library]] under A 19)

For further literature references, see [[Electronic Instrumentation|electronic instrumentation]].

[[Category:Elastomers]]
[[Category:Film Testing]]
[[Category:Impact Tests]]

Instrumented Tensile Impact Test (ITIT) - Revision history