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Characterization of Aluminum Honeycomb and Experimentation for Model Development and Validation, Volume I: Discovery and Characterization Experiments for High-Density Aluminum Honeycomb

Lu, Wei-Yang L.; Korellis, John S.; Lee, Kenneth L.; Scheffel, Simon S.; Hinnerichs, Terry D.; Neilsen, Michael K.; Scherzinger, William M.

Honeycomb is a structure that consists of two-dimensional regular arrays of open cells. High-density aluminum honeycomb has been used in weapon assemblies to mitigate shock and protect payload because of its excellent crush properties. In order to use honeycomb efficiently and to certify the payload is protected by the honeycomb under various loading conditions, a validated honeycomb crush model is required and the mechanical properties of the honeycombs need to be fully characterized. Volume I of this report documents an experimental study of the crush behavior of high-density honeycombs. Two sets of honeycombs were included in this investigation: commercial grade for initial exploratory experiments, and weapon grade, which satisfied B61 specifications. This investigation also includes developing proper experimental methods for crush characterization, conducting discovery experiments to explore crush behaviors for model improvement, and identifying experimental and material uncertainties.

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TYPE SAND Report YEAR 2006
DOIOSTIDOIOSTI

Validation of a new aluminum honeycomb constitutive model for impact analyses

Proceedings of 2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006 - Transportation

Hinnerichs, Terry D.; Pulling, Eric P.; Neilsen, Michael K.; Lu, Wei-Yang L.

A new constitutive model for large deformation of aluminum honeycomb has been developed. This model has 6 yield surfaces that are coupled to account for the orthotropic behavior of the cellular honeycomb being crushed on-axis and off-axis. Model parameters have been identified to fit uniaxial and biaxial crush test data for high density (38 1b/ft3) aluminum honeycomb. The honeycomb crush model has been implemented in the transient dynamic Presto finite element code for impact simulations. Simulations of calibration and validation experiments will be shown with model predictions compared with test data. Also, the honeycomb model's predictions will be compared with the older Orthotropic Rate Model predictions. Copyright © 2006 by ASME.

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TYPE Conference YEAR 2006
OSTIScopus
Results 76–100 of 110
Results 76–100 of 110