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High Strain Rate Testing of Metals
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The Challenge
Crashworthiness is a key part of the design of a
modern automobile. Under crash conditions,
structural materials are subject to very high
rates of strain. Many material properties,
including those of the steel or aluminum used
in the automobile body, are strain-rate
sensitive. Consequently, quasi-static
stress-strain data may not produce accurate
predictions of behavior at high strain rates,
and the use of such data in the analysis and
design of dynamically loaded structures can
lead to cautious overweight designs or
premature structural failure.
Our Solution
The Instron® servohydraulic VHS high rate
systems provides metals researchers
with extensive capabilities for impact and
high strain rate testing. The system
incorporates a very high performance
hydraulic actuator, up to 25 m (81 ft) per
second and resonance-free frame with an
advanced control system and profiler software
to ensure a constant strain rate during the test.
Patented ‘Fastjaw’ grips are utilized to only
grip the specimen once the actuator has
reached the correct velocity for the test.
Testing forces are measured using
high-stiffness piezoelectric load cells
and a high-speed data collection
system that records the entire
stress-strain curve at rates up to
5 MHz. These features allow
metals researchers to evaluate
their materials at a level of detail
never before possible.
About This Solution
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Related Literature:
Our Labs
Instron application labs are used for both research and development, as well as testing customer samples to assist in finding the right equipment.
Contact our Application Specialists to determine the solution that's best for you!
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