videoXtens biax 2-150 HP Extensometer

The videoXtens biax 2-150 HP determines the tensile modulus and Poisson’s ratio to ISO 527 with a level of accuracy never before achieved with non-contact extensometers. This level of accuracy is also attained at temperature inside a ZwickRoell temperature chamber. In addition, the videoXtens biax 2-150 HP can test without gauge marks, saving considerable time and money.
206108

Key Advantages and Features

Simple operation

  • Easy to operate
  • Automatic gauge-mark recognition and acquisition of initial gauge-length L0.
  • Tamper-proof: anti-tamper paint is applied to the lenses for the complete system so nothing can be adjusted. An important requirement for reliable test results.
  • Easy alignment to the specimen: videoXtens is centrally aligned to the gauge marks via the connection to the crosshead (option).
  • Compensation for different specimen thicknesses plus testing shear specimens.
  • Wear-free system = low-maintenance. The systems also feature an extremely long service life.
  • Connection to non-ZwickRoell machines via ±10V interface.

High accuracy and repeatability

  • High accuracy and repeatability
  • Extensometers mounted using stable, low-vibration support arms.
  • Housing provides protection against dirt and dust and inadvertent misalignment of the components.
  • Exact synchronization of all measurement channels.
  • Specially developed lighting provides continuous high-quality contrast ratios on the specimen, even with varying environmental conditions.
  • Industrial-quality cameras and high-quality, low-distortion lenses.
  • ZwickRoell extensometers exceed standards requirements, and are calibrated over the entire measurement range to ISO 9513 in the corresponding accuracy class.
  • The videoXtens 2-120 HP and videoXtens biax 2-150 HP are calibrated in accuracy class 0.5 to ISO 9513, with the first calibration point starting at 20 μm.
  • Additional calibration data-points for traceable, standard-compliant Young's modulus determination on plastics to ISO 527 (e.g. via additional calibration value at 25 µm) with the videoXtens 2-120 HP.
  • Compliance with strict requirements for determination of the tensile modulus to ISO 527 Appendix C (videoXtens 2-120 HP and videoXtens biax 2-150 HP).
  • The videoXtens biax 2-150 HP measures the change in width and Poisson’s ratio with an incomparable accuracy never before seen with non-contact extensometers.

Automatic centering

  • Automatic centering adjustment
  • videoXtens tracks at half crosshead speed via the connection to the crosshead, keeping the testing operation automatically in focus and making optimum use of the measuring range (larger measuring range possible).
  • This results in increased system measurement accuracy; the gauge marks shift less in the image and are captured in the center of the lens (low lens distortion).

Testing without gauge marks

  • Pattern recognition: testing with software gauge marks
  • The innovative pattern-recognition algorithm allows virtual gauge marks to be applied to the specimen. The gauge marks can be changed retrospectively and re-calculated (Test Re-Run option). It doesn't get any more convenient!
  • The essential requirement is for a pattern on the specimen - either a natural pattern due to a structured surface or an artificial pattern which can quickly be applied using a marker spray or by stippling.
206119

videoXtens biax 2-150 HP

The videoXtens biax 2-150 HP is the first and only optical measuring system that meets the requirements for the determination of the tensile modulus and the Poisson number according to ISO 527-1 (Appendix B and C). It can also test fiber composites without markings, which saves a great deal of time and money.

This test solution was specially developed for the needs of composite tests. With this one test system you cover the typical applications for composite testing. Due to the high accuracy, you can determine tensile modulus and Poisson number according to the high requirements of ISO 527-1 (Appendix B / C). This is also possible under temperature, as the system offers a unique accuracy of 1 µm below temperature in the ZwickRoell temperature control chamber.

You get comparable test results: Whether tests at ambient temperature or in the ZwickRoell temperature chamber, whether determining a module in the initial range or all values until it breaks, the same test system is always used without hardware changes. This also saves time.

You save even more time and costs because the videoXtens can check without any markings. No sample marking is required for non-transparent fiber composites. Due to the blue contrast light, the structure of the sample surface can be used to set virtual measuring marks via the software.

Typical application videoXtens biax 2-150 HP

Tensile test on fiber-reinforced composites

Tensile test on fiber-reinforced composites to ISO 527-4 /-5, ASTM D 3039, ASTM D 4018

  • Determination of the stress or strain curve up to breakage through a large measuring range with high resolution 
  • Brittle-fracturing fiber composites can be tested up to breakwithout damaging the extensometer.

Determination of the tensile modulus according to ISO 527-1 Appendix C

Determination of the tensile modulus according to ISO 527-1 Appendix C

  • Highly accurate measurement of longitudinal expansion using ZwickRoell array technology
  • Meeting the high requirements of ISO 527-1 Appendix C also in the ZwickRoell temperature chamber

Determination of the Poisson's ratio according to ISO 527-1 Appendix B

Determination of the Poisson's ratio according to ISO 527-1 Appendix B, also under temperature

  • Highly accurate measurement of longitudinal expansion using ZwickRoell array technology
  • Additional camera for high-precision measurement of the change in width integrated in the system
  • Fulfillment of the high requirements according to ISO 527-1 Appendix B also in the ZwickRoell temperature chamber

Determination of the shear modulus or the shear strain InPlane Shear (IPS) ± 45 °

Determination of the shear modulus or the shear strain InPlane Shear (IPS) ± 45 ° according to ASTM D 5318 & ISO 14129

  • Highly accurate measurement of longitudinal expansion using ZwickRoell array technology
  • Additional camera for high-precision measurement of the change in width integrated in the system
  • The large measuring range also enables measurements up to breakage

3/4-point bending test according to DIN EN ISO 14125

3/4-point bending test according to DIN EN ISO 14125

  • A software option is available for the 3/4-point bending test. No hardware expansion or retrofitting is required

Software Options 

testXpert III testing software offers various options for precise, traceable non-contact extension and strain distribution measurement. 

Test re-run

The optional Test ReRun module enables subsequent recalculation of strain on the basis of an image series recorded during a test, using a different initial gauge-length (provided multiple markings are present). This can be particularly advantageous in component testing, for example, when it is necessary to evaluate local strain at different locations, or in standard tensile tests when specimen necking has occurred outside the original initial gauge-length.

Automatic symmetrical adjustment of strain around necking to ISO 6892-1, Annex I

The recalculated strain can, of course, be synchronized subsequently with the other measurement values via the testXpert testing software.

Strain distribution

The Strain Distribution option enables determination of local strains at multiple measuring locations along the specimen gauge-length. These are available as channels in testXpert. Up to 16 measuring locations are automatically recognized and evaluated during the test. This option also allows automatic real-time symmetrical adjustment of the initial gauge-length around the necking (to ISO 6892-1, Annex I).

Video Capturing

Video capture is a recording of the test (without retrospective recalcualation). The recording is synchronized with the measured curve, enabling the test to be viewed retrospectively. The option includes no hardware, as recording and synchronization take place entirely via the videoXtens system.

2D dot matrix

This option allows two-dimensional measurement of dots applied to a planar specimen surface. This enables determination of local strains and specimen inhomogeneities under load. X and Y coordinates, as well as the distances between dots, are available as measured values.

Up to 100 measurement dots can be measured in any desired arrangement or in matrix form. Display in testXpert III is limited to 15 channels.

This option uses only one camera for measurement; any other cameras present are switched off beforehand.

Second measurement axis option 

With this option, biaxial measurements can be performed: In addition to the longitudinal strain, transverse strains can also be recorded—for example the change in width. Alternatively, change in width can of course also be measured alone.

  • Two versions are available for measurement of transverse strain:
  • Direct measurement on the specimen edge without additional markings (required for the determination of the r-value). For this version a backlight is required.
  • Measurement of the specimen surface with dot markings or sprayed-on pattern. For this version the specimen is illuminated with an incident light lamp.

Deflection measurement 

videoXtens can also be used for flexure tests. There are several options for measuring specimen deflection, depending on the type of test and the specimen condition and properties:

  • Measurement using incident light via marks on the specimen
  • Measurement using backlight on the specimen lower edge
  • Measurement of deflection in the test axis or of the polynomial approximation of the curve

Maximum deflection that can be measured: with videoXtens the maximum deflection corresponds to the FOV; with videoXtens Array to 1/3 of the total FOV (in this case deflection is measured with one camera only).

Technical Overview

videoXtens biax 2-150 HP

Type

videoXtens biax 2-150 HP

Item No.

1078869

Longitudinal strain

Field of view (FOV)

With test area width 440 mm, AllroundLine

155 x 55

mm

With test area width 640/1040 mm, AllroundLine

175 x 65

mm

Initial gauge length

With test area width 440 mm, AllroundLine

5 ... 130

mm

With test area width 640/1040 mm, AllroundLine

5 ... 150

mm

Measurement travel, max.

With test area width 440 mm, AllroundLine

140 - initial gauge length

mm

With test area width 640/1040 mm, AllroundLine

160 - initial gauge length

mm

Measurement travel, max. at 50 mm initial gauge length

With test area width 440 mm, AllroundLine

90 (180 % strain)

mm

With test area width 640/1040 mm, AllroundLine

110 (220 % strain)

mm

Measurement travel, max. at 75 mm initial gauge length

With test area width 440 mm, AllroundLine

65 (85 % strain)

mm

With test area width 640/1040 mm, AllroundLine

85 (110 % strain)

mm

Resolution at ambient temperature

0.15

µm

Transverse strain

Field of view (FOV)

With test area width 440 mm, AllroundLine

70 x 50

mm

Specimen width, max.

40

mm

With test area width 640/1040 mm, AllroundLine

85 x 65

mm

Specimen width, max.

55

mm

Resolution at ambient temperature

0.10

µm

General

Resolution to ISO 9513 in the ZwickRoell temperature chamber

At -20 ... +250 °C

Max. 0.4

µm

At -40 °C

Max. 0.6

µm

At -55 °C

Max. 0.8

µm

Frame rate / measured-value acquisition-rate, max.

500

fps / Hz

Accuracy class

To EN ISO 9513

0.5

To ASTM E83

B1 from gauge length 15 mm

Test speed, max.

1000

mm/min

Specimen thickness

0 ... 20

mm

Dimensions

Height

250

mm

Width

455 ... 705

mm

Depth

91

mm

Length of tunnel

90 ... 340

mm

Minimum version

testXpert III V 1.51

Scope of delivery

Measuring head with 3 digital cameras incl. 3 lenses

Tunnel for minimizing negative environmental conditions (e.g. air currents) with integrated blue contrast lighting

Software for image acquisition and evaluation

Accessory case with alignment and marking aids

INC module (for tC: RS module)

New testing technology for plastics laboratory

Raw material manufacturers, processors and users in the field of polymers have trusted the expertise of polymerphys IK for over 12 years. To support further expansion of their testing services, the company chose a testing machine with temperature chamber from ZwickRoell.
polymerphys IK GmbH
Top