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Crash Experiments
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Circular Tube Crush Tests, TMAC [+]
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Dynamic axial compression tests have been conducted on circular tube
specimens using the intermediate strain rate servo-hydraulic test
machine. These tests are conducted on different AISI material grades:
DQSK (1.6mm), HSLA340 (1.6 mm), DP590 (1.6 mm), DP780 (1.2 mm), BH300
(1.6 mm), TRIP600 (1.6 mm), TRIP780 (1.6 mm), 440WGA (1.2 mm) and DP780
HDGI Steel (1.2 mm). For each of these materials, nine tests were run,
corresponding to three replicates at three different test
velocities. In each case, minimum two out of the three replicates were
instrumented with a maximum of sixteen strain gages in locations of
crush fold formation. The inner diameter (100 mm) and the height (180
mm) of all the tubes were the same for all material grades to allow
for comparison and common tube fixturing.
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Octagonal Tube Crush Tests, TMAC [+]
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In support of developing standard test methods for characterizing the
behavior of sheet metal at high strain rates, dynamic axial
compression tests were conducted on octagonal tube specimens using the
intermediate strain rate servo-hydraulic test machine. The tests were
conducted on three different AISI material grades: DP590 (t=1.6mm, GI
coating), DP780 (t=1.2mm, GA coating), HSLA340 (1.6mm, GA
coating). For each of these materials, nine tests were run,
corresponding to three replicates at three different test velocities
(0.06 m/s, 0.6 m/s and 6 m/s). In each case, two out of the three
replicates were instrumented with a maximum of nine strain gages. The
geometry of all the tubes were the same for all material grades to
allow for comparison and common tube fixturing.
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Spotweld Tests, Drop Tower [+]
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Download PDF version of the spot weld test
report.
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Base Material Tests, High Speed Hydraulics [+]
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In support of the Auto/Steel Partnership (A/S-P), Strain Rate
Characterization Project, ORNL we have conducted high rate
experimental tensile tests and analysis of base materials. The
objective of the test program is to provide the necessary experimental
data in support of the A/S-P efforts to determine high-strain-rate
mechanical properties of Advanced High Strength Steels (AHSS). The
experiments and data also enable better predictive modeling of base
materials for finite element crash modeling. The test program
consists of testing tensile specimens under strain rates of
quasi-static, 0.1/s, 1/s, 10/s, 100/s, and maximum strain rates
achievable in full open loop configuration. The tests were conducted
on the new hydraulic test equipment at the Oak Ridge National
Laboratory. All the tests have been conducted using the same
apparatus. If an effective gage length for the chosen specimen is
known the equipment can be programmed to run non-linear velocities in
the drive file to achieve global strain control (engineering or true
strain rate as desired). High-speed video recording provide detailed
record of the test as well as displacement data for strain
measurements.
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