Introduction M14-13655-EN
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Introduction
The Model 8250 drop weight impact test machine is used to test the impact
characteristics of an extensive variety of materials and components over a wide range of
impact velocities. Data from these tests can then be used in the evaluation of material or
component performance.
The Model 8250 drop weight impact test machine consists of the frame, two guide
columns, hoist motor, drop-weight mechanism, control pendant, and accessories. Various
weights are available, providing the ability to reach many impact energy ranges. A tup
secured to the lower crosshead provides the load data for the attached data acquisition
system. A photo-detector/flag system provides velocity information.
Figure 1-1 shows the Dynatup 8250 Drop Tower.
Data Acquisition
Data can be acquired with the Instron Dynatup Model 930-I data acquisition system or
other general-purpose data systems. The data acquisition software runs on a personal
computer connected to the Model 8250. Test parameters, test setup information, test
results and statistics are available from the software program. Further information on data
systems can be obtained from Instron Dynatup.
Modes of Operation
The Model 8250 operates in either manual or automatic modes, and can be supplied with
an optional pneumatically assisted crosshead for high impact velocities.
Fixturing is available to conduct tests on manufactured specimens (Izod, Charpy),
components, sheet specimens (plaques, discs, film) and extruded structural shapes (pipes,
channels), to the following standards, as well as to numerous non-standard specifications:
• ASTM D-3763, Plastic Sheet Penetration
• ASTM E-23, Charpy and Izod
• ASTM D-256, Charpy and Izod
• BOEING BMS-256, Composites Penetration/Damage
• NASA ST-1, Composites Damage
• ASTM D-2444, Plastic Pipe
• BOEING 7260, Composites Damage
• MCDONNELL DOUGLAS MDC-J1938A
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