Oluschinski: Created page with "{{Language_sel|LANG=ger|ARTIKEL=Instrumentierter Kerbschlagbiegeversuch}} {{PSM_Infobox}} Instrumented Charpy impact test (ICIT) FORCETOC ==General== The instrumented Charpy impact test (ICIT) is a method of mechanical materials testing or experimental fracture mechanics testing (see: fracture mechanical testing) that is increasingly used in Material & Wer..."

2025-12-02T09:42:17Z

Created page with "{{Language_sel|LANG=ger|ARTIKEL=Instrumentierter Kerbschlagbiegeversuch}} {{PSM_Infobox}} Instrumented Charpy impact test (ICIT) __FORCETOC__ ==General== The instrumented Charpy impact test (ICIT) is a method of mechanical materials testing or experimental fracture mechanics testing (see: fracture mechanical testing) that is increasingly used in Material & Wer..."

New page

{{Language_sel|LANG=ger|ARTIKEL=Instrumentierter Kerbschlagbiegeversuch}}
{{PSM_Infobox}}
Instrumented Charpy impact test (ICIT)
__FORCETOC__

==General==

The instrumented Charpy impact test (ICIT) is a method of mechanical [[Materials Testing|materials testing]] or experimental fracture mechanics testing (see: [[Fracture Mechanical Testing|fracture mechanical testing]]) that is increasingly used in [[Material & Werkstoff|materials]] development and optimisation.

==Informativeness of the ICIT==

'''Figure 1''' shows the importance of instrumented testing (see: [[Electronic Instrumentation|electronic instrumentation]]) when performing the [[Notched Impact Test|notched impact test]]. While the notch impact energy ''A'', which is identical for both materials in conventional toughness assessment due to its integral character (''A''1 = ''A''2 and ''a''cN1 = ''a''cN2), the result of the instrumented test shows clear differences in terms of force (''F''max1 > ''F''max2) and deformation component (''f''max1 < ''f''max2). In addition, the instrumented Charpy impact test enables the determination of fracture mechanics toughness parameters ''K''Id, ''δ''Id and ''J''Id, which differ significantly for the two materials compared and thus enable differentiation (see also: [[Levels of Knowledge in Fracture Mechanics|levels of knowledge in fracture mechanics]]).

[[File:ICIT-1.jpg]]
{|
|- valign="top"
|width="50px"|'''Fig. 1''':
|width="600px" |Schematic representation of a load–deflection diagram for two materials with different deformation behaviour
|}

Another case where problems can arise when assessing the [[Toughness|toughness]] of materials using conventional [[Notched Impact Test|notched impact tests]] is shown in '''Fig. 2'''. Here, in the notch impact test on identical materials 1 and 2 (''A''1 = ''A''2), a not insignificant amount of crack propagation energy ''A''R occurs in material 1, which, however, is only visible and quantifiable when the test is performed with instruments. Since this part is not taken into account in a fracture mechanical evaluation, both materials have an identical toughness level for all fracture mechanical characteristics as a result of ''A''1 = ''A''2. If conventional notch impact tests are carried out on these materials, the crack propagation energy, if present, will be included in the evaluation. As a result, material 1 is overrated in terms of its [[Toughness|toughness level]] due to ''A''1+''A''R > ''A''2, even though ''A''1 = ''A''2.

[[File:ICIT-2.jpg]]
{|
|- valign="top"
|width="50px"|'''Fig. 2''':
|width="600px" |Schematic representation of load–deflection diagrams for materials with and without crack propagation energy
|}

==Application==

The instrumented Charpy impact test can therefore be used either to determine the impact strength or Charpy impact strength ''a''cU or ''a''cN, or to evaluate the load–deflection behaviour (see: [[Impact Test|conventional impact test]]). In this case, the ISO 179-2 standard is applied, or the instrumented Charpy impact test is performed as an experimental basis for a fracture mechanical toughness characterisation of materials.

==See also==

* [[Fracture Mechanical Testing|Fracture mechanical testing]]
* [[Electronic Instrumentation|Electronic instrumentation]]
* [http://wiki.polymerservice-merseburg.de/index.php/MPK-Prozedur_MPK-IKBV_englisch MPK-Procedure MPK-ICIT]
* [https://www.polymerservice-merseburg.de/fileadmin/inhalte/psm/veroeffentlichungen/MPK_IKZV_englisch.pdf Instrumented Tensile Impact Test (ITIT)]
* [[Impact Loading Pendulum Impact Tester]]
* [[Impact Loading Plastics]]
* [[Toughness]]

'''References'''

* Blumenauer, H., Schröder, H.: Anwendung des registrierenden Schlagbiegeversuches zur Prüfung von Polymerwerkstoffen. Plaste und Kautschuk 20 (1973) 11, 832–833
* [[Grellmann, Wolfgang|Grellmann, W.]]: Beurteilung der Zähigkeitseigenschaften von Polymerwerkstoffen durch bruchmechanische Kennwerte. Habilitation (1986), [https://de.wikipedia.org/wiki/Technische_Hochschule_Leuna-Merseburg Technische Hochschule Merseburg], Wiss. Zeitschrift TH Merseburg 28 (1986), No. 6, pp. 787–788 ([https://www.polymerservice-merseburg.de/fileadmin/inhalte/psm/veroeffentlichungen/Habil_Grellmann_Inhaltsverzeichnis.pdf Content], Summary)
* [https://www.researchgate.net/profile/Wolfgang-Grellmann Grellmann, W.]: Probleme und Ergebnisse der instrumentierten Kerbschlagbiegeprüfung von Polymerwerkstoffen. In: Henning, K., Michel, B. (Eds.): Fracture Mechanics, Micromechanics and Coupled Fields (FMC). Series (1982) No. 3, pp. 102–111 (see [[AMK-Büchersammlung|AMK-Library]] under E 43)
* [https://de.wikipedia.org/wiki/Wolfgang_Grellmann Grellmann, W.]: Probleme der Ermittlung von Bruch- und Trägheitskräften bei der Bestimmung dynamischer Bruchzähigkeiten von Polymerwerkstoffen. In: Henning, K., Michel, B. (Eds.): Fracture Mechanics, Micromechanics and Coupled Fields (FMC). Series (1982) No. 3, pp. 142–151 (see [[AMK-Büchersammlung|AMK-Library]] under E 43)
* ISO 179-2 (2020-05): Plastics – Determination of Charpy Impact Properties – Part 2: Instrumented Impact Test
* ESIS P2-92 (1992): Procedure for Determining the Fracture Behaviour of Materials
* ESIS TC 4 (2001): A Testing Protocol for Conducting J-Crack Growth Resistance Curve Test on Plastics
* [http://wiki.polymerservice-merseburg.de/index.php/MPK-Prozedur_MPK-IKBV_englisch MPK-Procedure_MPK-ICIT] (2016-08): Testing of Plastics – Instrumented Charpy Impact Test (ICIT): Procedure for Determination the Crack Resistance Behaviour using the Instrumented Impact Test
* [https://www.researchgate.net/profile/Wolfgang-Grellmann Grellmann, W.], Langer, B.: Methods for Polymer Diagnostics for the Automotive Industry. Materialprüfung 55 (2013) 17–22 [https://www.polymerservice-merseburg.de/fileadmin/inhalte/psm/veroeffentlichungen/Methods_for_Polymer_Diagnostics_for_the_Automotive_Industry__Grellmann_Langer_2013_.pdf Download als pdf]

Further literature references, see [[Electronic Instrumentation]]

[[Category:Fracture Mechanics]]
[[Category:Instrumented Impact Test]]
[[Category:Impact Tests]]

Instrumented Charpy Impact Test - Revision history