Rissausbreitung (RDS)

Rissmessstreifen der Serie RDS ermöglichen die Ermittlung der Rissfortpflanzung an Bauteilen.

expand_more

chevron_left

chevron_right

RDS: DMS für die Bestimmung der Rissfortpflanzung

Mit den Rissmessstreifen RDS kann an einem Bauteil die Rissfortpflanzung ermittelt werden. HBK bietet hierzu vier verschiedene Typen an:

RDS20 und RDS40 bestehen aus elektrisch getrennten Leiterbahnen (Widerständen), d. h., wenn sich der Riss ausbreitet, werden einzelne Stromkreise unterbrochen. Werden diese einzeln kontaktiert, so kann auch die Richtung der Rissausbreitung detektiert werden. In diesem Fall werden durch die Rissausbreitung einzelne Schaltkreise unterbrochen.

RDS17.8 und RDS22 bestehen aus parallel geschalteten Leiterbahnen, die reißen, wenn sich der Riss unter dem Rissmessstreifen fortpflanzt. Hierdurch wird der elektrische Widerstand des Messstreifens mit dem Risswachstum stufenweise erhöht.

Filter

Messgitterbreite keyboard_arrow_down
Messgitterbreite keyboard_arrow_down
Messgitterlänge keyboard_arrow_down
Trägerlänge keyboard_arrow_down
Trägerlänge keyboard_arrow_down
Trägerbreite keyboard_arrow_down
Trägerbreite keyboard_arrow_down

Code	Messgitterlänge	Messgitterlänge	Messgitterbreite	Messgitterbreite	Trägerlänge	Trägerlänge	Trägerbreite	Trägerbreite
1-RDS17.8	17.8 mm	0.701 in	38.75 mm	1.526 in	21 mm	0.827 in	41.6 mm	1.638 in
1-RDS 20	20 mm	0.787 in	22.5 mm	0.886 in	28 mm	1.102 in	25 mm	0.984 in
1-RDS 22	22 mm	0.866 in	5 mm	0.197 in	27.8 mm	1.094 in	6.8 mm	0.268 in
1-RDS 40	40 mm	1.575 in	8.4 mm	0.331 in	47 mm	1.85 in	10 mm	0.394 in

RDS - Bedienungsanleitung

Handbuch/Bedienungsanleitung

English

Certificates and Approvals

Strain Gauges - Konformitätserklärung

Konformitätserklärung

English

Crack Propagation (RDS)
Type/technology	Foil strain gauge
Application	Stress Analysis / structural testing
Geometry	3-grid rosette
Measuring grid length	22 mm, 17.8 mm, 20 mm, 40 mm
Measuring grid length	0.866 in, 0.701 in, 0.787 in, 1.575 in
Measuring grid width	5 mm, 38.75 mm, 22.5 mm, 8.4 mm
Measuring grid width	0.197 in, 1.526 in, 0.886 in, 0.331 in
Carrier length	27.8 mm, 21 mm, 28 mm, 47 mm
Carrier length	1.094 in, 0.827 in, 1.102 in, 1.85 in
Carrier width	6.8 mm, 41.6 mm, 25 mm, 10 mm
Carrier width	0.268 in, 1.638 in, 0.984 in, 0.394 in
Temperature range	Limited temperature range
Nominal resistance	Other resistance
Gauge factor (measuring grid material)	Constantan (ca 2.0)
Temperature response	No matching of temperature response
Maximum elongation	Standard
Fatigue life	Standard
Connection configuration	Leads
Mounting	Bondable
Grid protection	Covered

List of accessories available for all variants of this family

Product Code	Beschreibung
K-KAB-ML	Messleitung Meterware

This change in resistance can be measured using a resistance meter or strain gauge amplifier.

Connecting a crack propagation gauge and detecting signals

A resistance measurement can be used to detect the signal of the RDS crack propagation gauges. HBK DAQ systems can be used for this application (e.g. QuantumX or MGCplus).

The resulting resistance (R) of the RDS is dependent on the number of torn links and can easily be calculated. In this case, n identical resistors (Ri) are connected in parallel:

If a grid line is interrupted, this is described by

However, the measurement can be performed just as well with a measuring amplifier for SG measurements. The circuit diagram sketch shows how the RDS has to be complemented to obtain a resistance change that is inside the measuring range of an amplifier for strain gauge quarter bridges.

To minimize the effects of temperature, temperature-stable fixed resistors or SGs should be used as completion resistors. Greater sensitivity can be obtained by selecting a parallel resistor with a higher resistance value.

Do you have special requirements that are not adequately covered by any of the strain gauges in our standard program? Are you looking for an equivalent strain gauge for the product you are currently using? Have you designed your own strain gauge? Contact us, and we will produce customized strain gauges for you.

Recommended for you

Modern Slavery Statement Imprint Cookie Policy Privacy Policy Sitemap Company Profile