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| MPM Double Pendulum Machine |
Introduction
Dynamic Tear testing in accordance with ASTM E604, and Drop Weight Tear
Testing in accordance with ASTM E436, require either pendulum type or drop
tower type test machines. MPM manufactures both drop tower machines (see our
Drop Tower
web page)
and double pendulum machines which satisfy the requirements of E436 and E604.
System Features
As discussed in the ASTM standards, the capacity needed
to conduct tear tests on most steels is 2000 ft-lbs. The double pendulum
machine pictured here is a 2000 ft-lb machine. MPM can provide machines of
any desired capacity (ex, 30,000 ft-lb or higher). Double pendulum machines
are provided with 21,000 count encoders for accurate total absorbed energy
measurement (0.3 ft-lb accuracy). If requested, double pendulum test machines
can be provided with instrumented strikers (see our
Instrumented Impact Testing web page). Some
important features of the MPM double pendulum machine are listed below:
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Rigid frame construction and precision bearings
minimize energy loss
-
Encoder energy measurement accurate to within 0.3 ft-lb
on a 2000 ft-lb machine
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Motorized pendulum return system with computer control
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Velocity setting hardware so the impact velocity can be
varied
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Computer controlled pneumatic release
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Safety latches
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Impact v4.3 software with system control, automatic
data acquisition, and post-processing data base analysis capability
Options
The double pendulum impact test machine can be provided
with several options:
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