Fiscal Year	2018
Division	Research & Sponsored Programs
Department	Naval Research Program
Investigator(s)	Didoszak, Jarema M. Kwon, Young W.
Sponsor	NPS Naval Research Program (Navy)
Summary	Navy ships are expected to perform their mission in an arduous combat environment. Shock loading from non-contact explosions is one of many mechanisms that have the potential to cause extensive damage to these vessels. In particular, underwater explosions (UNDEX) resulting from mines, torpedoes, or other waterborne explosive devices pose considerable risk not only in structural failure, but also in terms of equipment damage, personnel casualties and ultimately mission kill. So critical is this issue that the Navy has outlined shock hardening requirements for surface combatants in OPNAVINST 9072.2A. Per this instruction, the Naval Sea Systems Command (NAVSEA) established general guidelines for the verification, validation, and certification of surface ship shock hardness. While there has been much discussion concerning which of the options outlined by the NAVSEA instruction offer the “best” result for ensuring ship shock hardness, there has been less attention given to the actual establishment of standardized criterion that constitute a survivable design. This current effort will focus an investigation into the underlying failure modes and specific failure criteria for shipboard equipment subjected to UNDEX. It will be pursued using Modeling & Simulation (M&S) supported by experimental testing. The outcome is a standardized procedure for the determination of shock related failure in equipment based on criteria derived from shock design space exploration using validated M&S models that can then be applied across various equipment and systems in the evaluation of a shock hardening.
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Publications	Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal
Data	Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal