Novel Crash Sled with a Translating Support Mass

Novel Crash Sled with a Translating Support Mass

Background: A novel crash sled has been developed with a translating support, incorporating transducers that allow multiple methods of measuring energy absorption to fully characterize the dynamic crush response of composite components. Objective: The main goal of the current investigation was to de...

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Bibliographic Details
Published in:Experimental mechanics Vol. 62; no. 4; pp. 715 - 728
Main Authors: Haluza, R T, Ruggeri, C R, Pereira, J M, Miller, S G, Bakis, C E, Koudela, K L
Format: Journal Article
Language:English
Published: Glenn Research Center Springer 01-04-2022
Springer US
Springer Nature B.V
Subjects:
Accelerometers
Algorithms
Aluminum
Biomedical Engineering and Bioengineering
Characterization and Evaluation of Materials
Composite Materials
Control
Crush tests
Data reduction
Dynamical Systems
Energy absorption
Engineering
Fiber reinforced plastics
Fiber reinforced polymers
Impact velocity
Lasers
Measurement methods
Measuring instruments
Optical Devices
Optics
Photonics
Reproducibility
Research Paper
Sleds
Solid Mechanics
Specimen geometry
Transducers
Vibration
Composite Materials
Crashworthiness
Dynamic Crush
Crash sled
Crush behavior
Energy absorption
Fiber composite
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Summary:Background: A novel crash sled has been developed with a translating support, incorporating transducers that allow multiple methods of measuring energy absorption to fully characterize the dynamic crush response of composite components. Objective: The main goal of the current investigation was to demonstrate functionality, repeatability, and accuracy of crush testing using a crash sled with a translating support mass. Methods: A semi-automated algorithm for data reduction was developed based on impact mechanics principles. A preliminary set of tests was initially conducted using aluminum honeycomb specimens with a specified stable crushing force to quantify the accuracy and repeatability of the crush data. Following the success of these tests, triaxially-braided fiber-reinforced polymer (FRP) specimens were evaluated. Results: Crush tests with the aluminum honeycomb specimens showed excellent outcomes for all three specimens. These data provided close agreement with cumulative energy absorption between individual instruments and stable crushing forces at expected values. For the FRP specimens, specific energy absorption (SEA) and force-displacement curves were successfully measured; however, data from the translating support mass accelerometer was excluded from the dataset due to clipping. The SEA of the corrugated specimens was greater than the SEA for the C-channel specimens at both test speeds. Conclusions: The crash sled functionality was verified, the specimen geometry was found to contribute more to SEA than the impact speed in the speed range tested, and the support mass accelerometer will be upgraded to prevent clipping in future tests.
Bibliography:Glenn Research Center
GRC
ISSN:0014-4851
1741-2765
DOI:10.1007/s11340-021-00812-8