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Crash Experiments
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Circular Tube Crush Tests, TMAC [+]
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Circular tube html.
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Octagonal Tube Crush Tests, TMAC [+]
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Octgonal tube html.
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Spotweld Tests, Drop Tower [+]
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Static and dynamic strength tests were performed for spot welded
specimens made of dual-phase (DP780) and mild steels (DQSK). Steels
were provided by A/SP members and welds were made by RoMan
Engineering. Lap-shear (LP) and cross-tension (CT) as well as a newly
designed mixed mode specimens were tested using MTS hydraulic
universal testing machine for static and drop weight tower for dynamic
tests. Three weld nugget sizes for each steel and specimen geometry
(LP and CT) were made. In the mixed mode test, only DP780 of one weld
size was tested. Load and displacement as functions of time and
failure mode of the spot welds were recorded in the tests.
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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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