Testing Machines for Biaxial Tensile Tests 

A distinctive aspect of materials testing is the biaxial tensile test or two-axis tensile test, used to determine the deformation properties of materials. It is primarily employed in research and development, as it allows defined stress values to be set and investigated at the intersection point of the specimen.

1 kN cruciform testing machine

Key advantages and features

Description

Baxial testing machines are available from Zwick in both standardized and customized versions.

  • Biaxial testing machine with electro-mechanical testing actuators (horizontally oriented) for uniaxial or biaxial tests on films/foils, paper, elastomers and biological materials up to a maximum test force of 2 kN
  • Biaxial testing machine with electro-mechanical testing actuators (vertically oriented) for uniaxial or biaxial tests on sheet metals, elastomers, plastics and components up to a maximum test force of 50 kN
  • Biaxial testing machines with table-top testing machines (horizontally oriented) for uniaxial or biaxial tests on sheet metals, elastomers, plastics and components up to a maximum test force of 150 kN
  • Vertically oriented biaxial testing machines for uniaxial or biaxial tests on sheet metals up to a maximum test force of 250 kN

Advantages & features

Advantages and features

  • employs proven Zwick standard components
  • convenient working height
  • unobstructed view of specimen
  • videoXtens employed for strain measurement and control
  • testControl measurement and control electronics
  • force or displacement control with smooth switching between modes
  • testXpert II Master test program with graphical multiaxial sequence editor for 4 test axes for generation of customer's own test sequences
  • low maintenance costs combined with high life-expectancy
  • safety housing in compliance with CE Machinery Directive depending on application

Strain measurement

Strain measurement in biaxial tensile tests

Strain measurement and strain control are usually on an optical basis via the proven videoXtens extensometer.

Types of control

Control options for biaxial testing machines

Depending on requirements, three types of control are available:

  • master-slave operation with 'electric shaft'
  • strain control
  • strain control with additional mid-point control

Technical overview

up to 2 kN - horizontal

Fmax

2

2

kN

Item No.

004628

073106

Load frame dimensions

height (max.)

2000[1]

2100[1]

mm

width (max.)

2100

2950

mm

depth (max.)

2100

2950

mm

Working height

1100

1200

mm

Diameter of baseplate

1200

-

mm

  1. incl. videoXtens mounting

up to 50 kN - vertical

Fmax

50

kN

Item No.

069104

Load frame dimensions

height (max.)

2700

mm

width (max.)

2600

mm

depth (max.)

420

mm

Working height

1350

mm

Depth of horizontal base of frame

880

mm

up to 150 kN - horizontal

Fmax

20

50

100

100

150

kN

Item No.

059972

091580

3000024

3000021

052685

Load frame dimensions

height (max.)

2600

2600

2600

2600

2600

mm

width (max.)

3200

3500

3600

3600

3900

mm

depth (max.)

3200

3500

3600

3600

3900

mm

Working height

1400

1400

1400

1400

1400

mm

Speed (max.)

1000

600

750

1500

900

mm/min

up to 250 kN - vertical

Fmax

250

kN

Item No.

000661

Load frame dimensions

height (max.)

2400

mm

width (max.)

2200

mm

depth (max.)

1100

mm

Working height

1200

mm

Stroke per axis (max.)

100

mm

Speed (max.)

40

mm/min

Soft robot mimics caterpillar movement

Researchers at Tufts University in the US are using a Zwick biaxial testing machine to test biological and engineered biocompatible materials for the development of the world's first soft-bodied robot. Based on the neuromechanical system of the caterpillar Manduca sexta, the softbot prototype is approximately 30 cm long and made of silicone elastomer. The mechanical material characterization is performed at the Soft Materials Characterization Laboratory at Tufts' Advanced Technology Laboratory, led by Professor Luis Dorfmann.
TUFTS1
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