Model 833 Triaxial Test System
Dynamic characterization and fatigue testing of elastomers

The Model 833 Triaxial Elastomer Test
System is a second generation of true
triaxial test systems for fatigue andcharacterization testing of elastomericmaterials and components.
This system was developed to meet thedemanding test requirements of theautomotive industry. It is designed to use anoptional software package that will accurately
reproduce road load data on three axes.
Thus, with MTS Remote Parameter Control™
(RPC®) software or Component RPC, thissystem will provide true simulation forfatigue and durability testing.
While this technology will be used
extensively for testing engine mounts, it isalso appropriate for other triaxial simulationneeds requiring excitation in a frequency
range of 0.0l to a minimum of 80 Hz. The
MTS Model 833 can be used for triaxial
durability studies for detection of the onset
and progression (degradation) of component
failures and for dynamic characterizationin each of three axes.

This new triaxial test system willaccommodate most elastomer specimen
sizes, up to 400 mm diameter. The moveableload frame crosshead provides easy loadingand permits a variety of specimen heights,
up to 550 mm.
Force capacity of the system is ±25 kN on
each axis. The displacement is ±25 mm oneach axis. Static and dynamic forcestransmitted through the specimen can bemeasured during all phases of fatigue andcharacterization testing. Sequencing fatigueand characterization test steps allows thecomponent or material to be closely
monitored as it fails.
A unique MTS force transducer provides
simultaneous multiaxial measurements(Fx, Fy, Fz, Mx, My, Mz). Cross coupling
compensation minimizes possible errorscaused by off axis loading. In addition,geometric compensation minimizes
further errors caused by off axis loading.

transparent controller. All interaction withthe test and test system is done with a PC.
MTS RPC simulation software is theindustry standard for fatigue and durability
testing of ground vehicles and components.
Together, these technologies provide
unmatched power, capability and versatility
for triaxial elastomer testing.

The force transducer is mounted to themoveable crosshead assembly. Hydrauliclifts and locks control the crosshead for easy
specimen mounting and ready access totest space. Large diameter, hollow columns
and a light but stiff crosshead load unit
pro­vide more accurate displacementmea­surement than other designs. Anotherattribute is the fact that the load frame
resonance is outside of the operating
frequency range, providing better phase,load, and displacement resolution within
the system’s wide operating range. Strutand flexure assemblies are also lightweightand stiff. The unique software provided
with this unit incorporates a sophisticatedmass and load path stiffness compensation
directly into the control loop.
Software and Test Control
Application and control software for theMTS Triaxial Elastomer Test Sys­tem wasdeveloped to allow maximum utilizationof the capabilities of the sys­tem. Thus, it
provides a wide range of measurement
and system control.
The system is unique in that it offers asoft­ware package that includes both
TestStar™ and Remote Parameter Control(RPC) appli­cation and analysis software.
TestStar is the name for the control systemused on most MTS elastomer test systems.
It features software control of the test andtest system working through an essentially

MTS Systems Corporation
14000 Technology Drive
Eden Prairie, MN 55344-2290 USA
ISO 9001 Certified QMS

For example, the system pro­vides
measurement of static stiffness in threeaxes. Dynamic stiffness/­damping prop­erties
can be either sequentially or simultaneously
measured in the three axes. The operator
specifies the desired sequence and test
parameters during test set-up.
The system gives you the ability to separately
control any combination of the following:
Mean Amplitude

Dynamic Amplitude

Force
Displacement

Force
Displacement
Acceleration

It also will let you automatically con­trol thephase between the three channels witha patented control algo­rithm speciallydesigned to minimize phase andamplitude errors.
The MTS Triaxial Elastomer Test System
is designed to provide exact excitation
amplitudes in each axis at the specimen
for repeatability. For easier testing, all test
setup parameters are readily recalled, as
are specific test procedures. Further­more,
the system lets you analyze specific dynamic,
static or fatigue data, on-the-­fly, without
interrupting the test.
System software allows the operator tosequence between fatigue-durability
excitation and measurement of static ordynamic properties. It also lets you employ
traditional, repetitive sinusoidal waveforms
for fatigue durability excitation, as wellas road-load data using MTS Remote
Parameter Control Techniques.
The MTS Triaxial Elastomer Test System
software employs standard spreadsheet
formats for graphical and tabular display

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Toll Free: 1.800.328.2255
E-mail: info@mts.com
www.mts.com

of measured and calcu­lated parameters.
In addition, you can call-up time-based(hysteresis-loop) or frequency-based(spectral analysis) pre­sentation of dynamicdata. Advanced macros are included toprovide easy graphical presentation of test
data that are poten­tially very complex.
Environmental Simulation
An optional environmental chamber allows
accurate simulation of the com­ponent
or material service environment. The
range of the chamber is -50 to l50
degrees C. Control and monitoring of
the environmental chamber are completely
integrated into the system’s application
software. The chamber dimensions willaccommodate a range of specimen sizes.
Interior dimensions are 436 mm wide by
468 mm deep. Height is 268 mm on the rightside of the chamber and 199 mm on the left.
Door and window allow visual inspection.
For More Information
If you would like more information onthe MTS Triaxial Elastomer Test System,
contact your local MTS Sales Engineer.
You can also contact the company at theaddress below or visit our web site atwww.mts.com.

MTS and RPC are registered trademarks and Remote
Parameter Control and TestStar are trademarks of MTS
Systems Corporation. These trademarks may be protected
in other countries. RTM No. 211177.
©2024 MTS Systems Corporation
100-015-996b Triaxial833 • Printed in U.S.A. • 01/24