Discrete Element Method for Modeling Penetration
Problems Involving Thermal Hydraulics, Liquid Sloshing, and Extreme Loads on Structures
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... ters Services, Directorate for Information Operations and Reports (0704.0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of Information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 15. SUBJECT TERMS Discrete element method, DEM, damage, penetration. 16. SECURITY CLASSIFICATION OF: 17. LIMITATION 18. NUMBER 19a. NAME OF RESPONSIBLE PERSON OF ABSTRACT OF PAGES Michael E. Plesha a. REPORT b. ABSTRACT c. THIS PAGE 19b. TELEPHONE NUMBER (include area Unclassified Unclassified Unclassified 35 code) 608-262-5741 Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std. Z39.18 Abstract This research resulted in the development of the Discrete Element Method (DEM) as a general, robust, and scalable computer technique for unified modeling of the mechanical behavior of solid and particulate materials, including the transition from solid phase to particulate phase. Applications include gross damage of structures due to extreme load events, and high speed penetration of structures, involving materials such as concrete, rock, and novel combinations of these. This computer approach is useful for assessing vulnerability of military and civilian facilities such as nuclear power reactors, transportation facilities, buildings, and so on, and for assessing efficacy of military operations involving such structures. One of the primary accomplishments of this research is the development of interelement potentials for the DEM method such that accurate and convergent results are obtained.