Oluschinski at 13:28, 12 December 2025

2025-12-12T13:28:14Z

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Oluschinski: Created page with "{{Language_sel|LANG=ger|ARTIKEL=Servohydraulische Prüfmaschine}}{{PSM_Infobox}} Servo-hydraulic testing machine FORCETOC ==Fundamentals== In servo-hydraulic high-speed testing machines (see also: high-speed tensile test), the load on the test specimen is not applied according to the principle of force coupling, as is the case in [[Quasi-static Test Methods|quasi-static]..."

2025-12-05T13:18:06Z

Created page with "{{Language_sel|LANG=ger|ARTIKEL=Servohydraulische Prüfmaschine}}{{PSM_Infobox}} <span style="font-size:1.2em;font-weight:bold;">Servo-hydraulic testing machine</span> __FORCETOC__ ==Fundamentals== In servo-hydraulic high-speed testing machines (see also: high-speed tensile test), the load on the test specimen is not applied according to the principle of force coupling, as is the case in [[Quasi-static Test Methods|quasi-static]..."

New page

{{Language_sel|LANG=ger|ARTIKEL=Servohydraulische Prüfmaschine}}{{PSM_Infobox}}
<span style="font-size:1.2em;font-weight:bold;">Servo-hydraulic testing machine</span>
__FORCETOC__

==Fundamentals==

In servo-hydraulic high-speed testing machines (see also: [[High-speed Tensile Test|high-speed tensile test]]), the load on the test [[Specimen|specimen]] is not applied according to the principle of force coupling, as is the case in [[Quasi-static Test Methods|quasi-static]] [[Tensile Test|tensile tests]], but according to the principle of energy transfer. This means that the kinetic energy is suddenly introduced into the test specimen as deformation work [1, 2] (see: [[Drives Materials Testing Machine#Servo-hydraulic drive|servo-hydraulic drive]] for materials testing machines). The selected [[Test Speed|test speed]] is achieved via a run-up distance, whereby a run-up bolt is clamped to the test specimen. At the end of the run-up distance, the test specimen is coupled in a force-fit manner.

The Figure shows a schematic diagram of a servo-hydraulic testing machine. This testing machine can achieve a maximum test speed of 20 m/s and a maximum load of 25 kN.

[[File:Servo-hydraulic Testing Machine-1.jpg]]
{|
|- valign="top"
|width="50px"|'''Figure''':
|width="600px" |Schematic diagram of the Instron VHS 25/25-20 servo-hydraulic testing machine [3, 4]
|}

==Experimental procedure==

The procedure for the [[High-speed Tensile Test|high-speed tensile test]] differs from that of the [[Quasi-static Test Methods|quasi-static experiment]] in that there is no direct coupling between the test specimen and the piston rod. Once the desired [[Test Speed|test speed]] has been reached over the run-up distance, the energy of the system is suddenly transferred to the test specimen [1]. In order to minimise the vibrations occurring during the sudden load (see: [[Impact Loading Plastics|impact loading plastics]]), a damping disc made of 4 mm thick leather was used in the run-up section. The force was measured using a [[Piezoelectric Force Transducer|piezoelectric force transducer]], and the elongation of the test specimen was determined using an [[Tensile Test#Tensile test, path measurement technique|inductive displacement transducer]] (LVDT).

==See also==

* [[Material Testing Machine|Material testing machine]]
* [[High-speed Tensile Test|High-speed tensile test]]
* [[Crosshead Speed|Crosshead speed]]
* [[Drives Materials Testing Machines|Drives materials testing machines]]
* [[Impact Loading High-Speed Testing|Impact loading high-speed testing]]

'''Referecnces'''

{|
|-valign="top"
|[1]
|Bardenheier, R., Rogers, G.: Dynamic Impact Testing. Instron Ltd., High Wycombe, UK (2003)
|-valign="top"
|[2]
|Bardenheier, R., Borsutzki, M.: Anforderungen an Hochgeschwindigkeitsprüfsysteme zur Ermittlung von Kennwerten an Blechwerkstoffen. In: Buchholz, O. W., Geisler, S. (Eds.): Herausforderung durch den industriellen Fortschritt – Proceedings Werkstoffprüfung (2003) pp. 78–87, (ISBN 3-514-00703-9; see [[AMK-Büchersammlung|AMK-Library]] under M 11)
|-valign="top"
|[3]
|Bardenheier, R.: Dynamic Impact Testing – VHS High Rate Testing Systems. Instron Ltd., High Wycombe, UK (2005)
|-valign="top"
|[4]
|Stahl-Eisen-Prüfblätter (SEP) 1230 (2007-02): The Determination of Mechanical Propertiesof Sheet Metal at High Strain Rates in High Speed Tensile Tests
|}

==Weblinks==

Wikipedia – The Free Encyclopedia: Materials Testing Machine https://en.wikipedia.org/wiki/Universal_testing_machine

[[Category:Tensile Test]]

Servo-hydraulic Testing Machine - Revision history

Oluschinski at 13:28, 12 December 2025