Fatigue Testing Machines For Complex Tensile, Compression and Flexure Tests

These testing machines from Zwick are predominantly used to perform tensile, compression and flexure tests with complex, dynamic stress sequences.

Special Features

  • Extremely rigid, practically resonance-free load frame with manually or hydraulically adjustable crosshead.
  • Continuous rated working cylinder with highly accurate guide mechanisms thus ensuring maximum rigidity on all testing levels
  • Precision strain gauge load cells for continuous operation at maximum dynamic loading
  • LVDT-extensometer (installed centrically in the piston rod) with high resolution, linearity and long service life.
  • Freely positionable hydraulic unit
  • Low noise level through internal geared wheel feed pump
  • Optionally water or air cooling

Servo-hydraulic Testing Machine Amsler HB126/80

Figure 1. Servo-hydraulic Testing Machine Amsler HB126/80

Technical data

See table servohydraulic testing machines (STM)(Table 1)

Measurement and Control Electronics

The digital measurement and control electronics Amsler HydroWin® 9600 offers connections for external transducers and extensive applications software.

High-frequency Testing Machine Amsler HFP 400

Figure 2. High-frequency Testing Machine Amsler HFP 400

High-frequency Testing Machines (Vibrophores) (With Electro-magnetic Resonance Drive)

Application

Force or strain-controlled tests for determining the oscillation stability in the time and fatigue strength range.

  • Fatigue tests according to DIN 50100 (Wöhler curve) in the tensile, compression, pulsating and alternate load range
  • Mechanical fracturing tests on CT and COD specimens
  • Stimulation of oscillations of the flexure specimens
  • Time and fatigue-strength investigations on components such as springs, bolts, crankshafts, connecting rods, steering knuckles etc.
  • Production and quality control of components which are exposed to dynamic stressing during their service life.
  • Tests under various environmental conditions (temperature, aggressive media).

Special features

  • Low energy consumption
  • High test frequencies, short test times
  • No adjustment of excitation air gap
  • High-frequency testing machine

Amsler HFP 5

Figure 3. Amsler HFP 5

Technical Data

See table high-frequency testing machines (HFP)(Table 2)

Measurement and Control System

Measurement and control of these testing machines is taken over by the measurement and control electronics VibroWin®. The data selected by the operator as well as the set values and actual values are digitally displayed on the screen.

Rotary Bending Testing Machines

Application

With the rotary bending test, the fatigue strength of round specimens under reversed bending stresses is determined.

Technical Data

See table rotary bending testing machines (UBM) (Table 3)

Rotary bending testing machine Amsler UBM 200

Figure 4. Rotary bending testing machine Amsler UBM 200

Table 1. Servo-hydraulic testing machines (STM) - Standard design1

Series/type2

HC

HB

HA

Construction type

table top

floor stand

floor stand.

Load frame nominal force – kN

5 – 25

50 – 1000

50 - 500

Test stroke – mm

100

100/250/400

100/250

Specimen length – mm

100 – 700

100 – 1100

250 - 1500

Hydraulic unit

System pressure bar

210/280

210/280

210/280

Flow l/min

4 – 23

9 – 600

9 - 600

Max. power consum. kVA

2.2 – 11

2.2 – 74

2.2 - 74

1 Load frames and actuators for higher nominal forces on request

2 In the HC and HB serie the actuators are situated in the upper crosshead, in the HA serie

in the lower crosshead

Table 2. High-Frequency testing machines (HFP)

Series/type

Amsler HFP 1 – 5

Amsler HFP 20 - 550

Construction type

table top

floor standing

Load frame nominal force kN

1 – 5

20 - 550

Max. force amplitude kN

2.5

275

Max. elast. spec. deform. Mm

± 3

± 2

Frequency range Hz

35 – 300

35 - 300

Frequency levels

5

16/5

Working area width mm

350

530/600

Max. power consum. kVA

2

5

Table 3. Rotary bending testing machines (UBM)

Series/type

AmslerUBM 200

Amsler UBM 2000

Max. bending moment Nm

200

2000

Load reversal frequency min

-1 50 – 5000

600 – 3000

Max. specimen diameter mm

25

50

Max. power consum. kVA

1.6

5.5

This information has been sourced, reviewed and adapted from materials provided by Zwick.

For more information on this source, please visit Zwick.

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